--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Josh,
>
> It looks like the TB6560 has a minimum Step Pulse time of 30us.  KFLOP has a max step pulse time of 3.78us. 
>
>
> http://www.toshiba.com/taec/components2/Datasheet_Sync/382/27885.pdf
>
> I can't think of a simple solution.
>
>
> When you were driving with the LPT what pulse width were you using?
>
>
> Regards
> TK
>
>
>
>
> ________________________________
> From: inbilla <inbilla@...>
> To: DynoMotion@yahoogroups.com
> Sent: Friday, June 22, 2012 11:27 PM
> Subject: [DynoMotion] KFLOP issues driving an LPT driver board TB6560
>
>
>  
> Hi There,
>
> I am currently having issues getting the KFLOP to drive my stepper motors for my CNC. The driver board is based on the TB6560 amplifier, and is usually connected to an LPT Port.
>
> I have created a board to map JP7 to the LPT port header appropriately, and all the signals look fine. However, when I attempt to step the motors using KMotionCNC, the steppers seem to stutter back and forth, and don't work properly.
>
> I have found that stepping at slower speeds tends to result in stutter. Stepping at higher speeds will stall the motors (expected). And stepping at medium speeds will sometimes work nicely.
>
> I currently have one axis configured. The following is the C code for that:
>
> ch0->InputMode=NO_INPUT_MODE;
> ch0->OutputMode=STEP_DIR_MODE;
> ch0->Vel=3000;
> ch0->Accel=2e+005;
> ch0->Jerk=1e+008;
> ch0->P=0;
> ch0->I=0.01;
> ch0->D=0;
> ch0->FFAccel=0;
> ch0->FFVel=0;
> ch0->MaxI=200;
> ch0->MaxErr=1e+006;
> ch0->MaxOutput=200;
> ch0->DeadBandGain=1;
> ch0->DeadBandRange=0;
> ch0->InputChan0=0;
> ch0->InputChan1=0;
> ch0->OutputChan0=8;
> ch0->OutputChan1=0;
> ch0->MasterAxis=-1;
> ch0->LimitSwitchOptions=0x7070020;//0x7070003;
> ch0->InputGain0=1;
> ch0->InputGain1=1;
> ch0->InputOffset0=0;
> ch0->InputOffset1=0;
> ch0->OutputGain=-1;
> ch0->OutputOffset=0;
> ch0->SlaveGain=1;
> ch0->BacklashMode=BACKLASH_OFF;
> ch0->BacklashAmount=549;
> ch0->BacklashRate=1;
> ch0->invDistPerCycle=1;
> ch0->Lead=0;
> ch0->MaxFollowingError=1000000000;
> ch0->StepperAmplitude=20;
>
> ch0->iir[0].B0=1;
> ch0->iir[0].B1=0;
> ch0->iir[0].B2=0;
> ch0->iir[0].A1=0;
> ch0->iir[0].A2=0;
>
> ch0->iir[1].B0=1;
> ch0->iir[1].B1=0;
> ch0->iir[1].B2=0;
> ch0->iir[1].A1=0;
> ch0->iir[1].A2=0;
>
> ch0->iir[2].B0=0.000769;
> ch0->iir[2].B1=0.001538;
> ch0->iir[2].B2=0.000769;
> ch0->iir[2].A1=1.92076;
> ch0->iir[2].A2=-0.923833;
>
> I thought perhaps the step pulse width, and/or polarity weren't right for this board, so I added the following line too:
>
> FPGA(STEP_PULSE_LENGTH_ADD)= 62;// + 0x80;
>
> I have tried both with and without bit 7 to change the polarity. But it doesn't seem to make any difference.
>
> I have also thought perhaps the LVTTL output of 3.3v isn't enough, so I've even tried converting the voltage up to 5v, however it doesn't seem to have made any difference.
>
> I can only imagine that either my KFLOP is faulty? Or the above configuration of the axis is incorrect?
>
> Does anyone have any thoughts on where I should go from here? I've come up against a wall now...
>
> I have also posted on the forum from where I got the driver board/CNC kit. The forum post there is:
> http://forums.zentoolworks.com/viewtopic.php?f=11&t=2042
>
> Any help or suggestions would be appreciated!
> Thanks
>
> Josh
>

--- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@...> wrote:
>
> Hi Tom,
>
> Thanks for your diagnosis, I had a feeling it was going to be something like that. I've been looking for somewhere to get that information from. Thanks for hunting it down!
>
> I guess the question is... Is it possible to get a version of the kflop firmware that supports a broader range of pulse widths?
>
> Thanks Tom
>
> Josh
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi Josh,
> >
> > It looks like the TB6560 has a minimum Step Pulse time of 30us.  KFLOP has a max step pulse time of 3.78us. 
> >
> >
> > http://www.toshiba.com/taec/components2/Datasheet_Sync/382/27885.pdf
> >
> > I can't think of a simple solution.
> >
> >
> > When you were driving with the LPT what pulse width were you using?
> >
> >
> > Regards
> > TK
> >
> >
> >
> >
> > ________________________________
> > From: inbilla <inbilla@>
> > To: DynoMotion@yahoogroups.com
> > Sent: Friday, June 22, 2012 11:27 PM
> > Subject: [DynoMotion] KFLOP issues driving an LPT driver board TB6560
> >
> >
> >  
> > Hi There,
> >
> > I am currently having issues getting the KFLOP to drive my stepper motors for my CNC. The driver board is based on the TB6560 amplifier, and is usually connected to an LPT Port.
> >
> > I have created a board to map JP7 to the LPT port header appropriately, and all the signals look fine. However, when I attempt to step the motors using KMotionCNC, the steppers seem to stutter back and forth, and don't work properly.
> >
> > I have found that stepping at slower speeds tends to result in stutter. Stepping at higher speeds will stall the motors (expected). And stepping at medium speeds will sometimes work nicely.
> >
> > I currently have one axis configured. The following is the C code for that:
> >
> > ch0->InputMode=NO_INPUT_MODE;
> > ch0->OutputMode=STEP_DIR_MODE;
> > ch0->Vel=3000;
> > ch0->Accel=2e+005;
> > ch0->Jerk=1e+008;
> > ch0->P=0;
> > ch0->I=0.01;
> > ch0->D=0;
> > ch0->FFAccel=0;
> > ch0->FFVel=0;
> > ch0->MaxI=200;
> > ch0->MaxErr=1e+006;
> > ch0->MaxOutput=200;
> > ch0->DeadBandGain=1;
> > ch0->DeadBandRange=0;
> > ch0->InputChan0=0;
> > ch0->InputChan1=0;
> > ch0->OutputChan0=8;
> > ch0->OutputChan1=0;
> > ch0->MasterAxis=-1;
> > ch0->LimitSwitchOptions=0x7070020;//0x7070003;
> > ch0->InputGain0=1;
> > ch0->InputGain1=1;
> > ch0->InputOffset0=0;
> > ch0->InputOffset1=0;
> > ch0->OutputGain=-1;
> > ch0->OutputOffset=0;
> > ch0->SlaveGain=1;
> > ch0->BacklashMode=BACKLASH_OFF;
> > ch0->BacklashAmount=549;
> > ch0->BacklashRate=1;
> > ch0->invDistPerCycle=1;
> > ch0->Lead=0;
> > ch0->MaxFollowingError=1000000000;
> > ch0->StepperAmplitude=20;
> >
> > ch0->iir[0].B0=1;
> > ch0->iir[0].B1=0;
> > ch0->iir[0].B2=0;
> > ch0->iir[0].A1=0;
> > ch0->iir[0].A2=0;
> >
> > ch0->iir[1].B0=1;
> > ch0->iir[1].B1=0;
> > ch0->iir[1].B2=0;
> > ch0->iir[1].A1=0;
> > ch0->iir[1].A2=0;
> >
> > ch0->iir[2].B0=0.000769;
> > ch0->iir[2].B1=0.001538;
> > ch0->iir[2].B2=0.000769;
> > ch0->iir[2].A1=1.92076;
> > ch0->iir[2].A2=-0.923833;
> >
> > I thought perhaps the step pulse width, and/or polarity weren't right for this board, so I added the following line too:
> >
> > FPGA(STEP_PULSE_LENGTH_ADD)= 62;// + 0x80;
> >
> > I have tried both with and without bit 7 to change the polarity. But it doesn't seem to make any difference.
> >
> > I have also thought perhaps the LVTTL output of 3.3v isn't enough, so I've even tried converting the voltage up to 5v, however it doesn't seem to have made any difference.
> >
> > I can only imagine that either my KFLOP is faulty? Or the above configuration of the axis is incorrect?
> >
> > Does anyone have any thoughts on where I should go from here? I've come up against a wall now...
> >
> > I have also posted on the forum from where I got the driver board/CNC kit. The forum post there is:
> > http://forums.zentoolworks.com/viewtopic.php?f=11&t=2042
> >
> > Any help or suggestions would be appreciated!
> > Thanks
> >
> > Josh
> >
>

--- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@...> wrote:
>
> On your advice, I've tried hooking up an Arduino instead of the KFLOP to the pins. You're right, the min pulse width for this particular board appears to be around 90us with 16x microstepping, and much higher with no microstepping enabled.
>
> I guess my only hope is to find custom firmware? or find a stepper driver that supports 4us?
>
>
> --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> >
> > Hi Tom,
> >
> > Thanks for your diagnosis, I had a feeling it was going to be something like that. I've been looking for somewhere to get that information from. Thanks for hunting it down!
> >
> > I guess the question is... Is it possible to get a version of the kflop firmware that supports a broader range of pulse widths?
> >
> > Thanks Tom
> >
> > Josh
> >
> > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > >
> > > Hi Josh,
> > >
> > > It looks like the TB6560 has a minimum Step Pulse time of 30us.  KFLOP has a max step pulse time of 3.78us. 
> > >
> > >
> > > http://www.toshiba.com/taec/components2/Datasheet_Sync/382/27885.pdf
> > >
> > > I can't think of a simple solution.
> > >
> > >
> > > When you were driving with the LPT what pulse width were you using?
> > >
> > >
> > > Regards
> > > TK
> > >
> > >
> > >
> > >
> > > ________________________________
> > > From: inbilla <inbilla@>
> > > To: DynoMotion@yahoogroups.com
> > > Sent: Friday, June 22, 2012 11:27 PM
> > > Subject: [DynoMotion] KFLOP issues driving an LPT driver board TB6560
> > >
> > >
> > >  
> > > Hi There,
> > >
> > > I am currently having issues getting the KFLOP to drive my stepper motors for my CNC. The driver board is based on the TB6560 amplifier, and is usually connected to an LPT Port.
> > >
> > > I have created a board to map JP7 to the LPT port header appropriately, and all the signals look fine. However, when I attempt to step the motors using KMotionCNC, the steppers seem to stutter back and forth, and don't work properly.
> > >
> > > I have found that stepping at slower speeds tends to result in stutter. Stepping at higher speeds will stall the motors (expected). And stepping at medium speeds will sometimes work nicely.
> > >
> > > I currently have one axis configured. The following is the C code for that:
> > >
> > > ch0->InputMode=NO_INPUT_MODE;
> > > ch0->OutputMode=STEP_DIR_MODE;
> > > ch0->Vel=3000;
> > > ch0->Accel=2e+005;
> > > ch0->Jerk=1e+008;
> > > ch0->P=0;
> > > ch0->I=0.01;
> > > ch0->D=0;
> > > ch0->FFAccel=0;
> > > ch0->FFVel=0;
> > > ch0->MaxI=200;
> > > ch0->MaxErr=1e+006;
> > > ch0->MaxOutput=200;
> > > ch0->DeadBandGain=1;
> > > ch0->DeadBandRange=0;
> > > ch0->InputChan0=0;
> > > ch0->InputChan1=0;
> > > ch0->OutputChan0=8;
> > > ch0->OutputChan1=0;
> > > ch0->MasterAxis=-1;
> > > ch0->LimitSwitchOptions=0x7070020;//0x7070003;
> > > ch0->InputGain0=1;
> > > ch0->InputGain1=1;
> > > ch0->InputOffset0=0;
> > > ch0->InputOffset1=0;
> > > ch0->OutputGain=-1;
> > > ch0->OutputOffset=0;
> > > ch0->SlaveGain=1;
> > > ch0->BacklashMode=BACKLASH_OFF;
> > > ch0->BacklashAmount=549;
> > > ch0->BacklashRate=1;
> > > ch0->invDistPerCycle=1;
> > > ch0->Lead=0;
> > > ch0->MaxFollowingError=1000000000;
> > > ch0->StepperAmplitude=20;
> > >
> > > ch0->iir[0].B0=1;
> > > ch0->iir[0].B1=0;
> > > ch0->iir[0].B2=0;
> > > ch0->iir[0].A1=0;
> > > ch0->iir[0].A2=0;
> > >
> > > ch0->iir[1].B0=1;
> > > ch0->iir[1].B1=0;
> > > ch0->iir[1].B2=0;
> > > ch0->iir[1].A1=0;
> > > ch0->iir[1].A2=0;
> > >
> > > ch0->iir[2].B0=0.000769;
> > > ch0->iir[2].B1=0.001538;
> > > ch0->iir[2].B2=0.000769;
> > > ch0->iir[2].A1=1.92076;
> > > ch0->iir[2].A2=-0.923833;
> > >
> > > I thought perhaps the step pulse width, and/or polarity weren't right for this board, so I added the following line too:
> > >
> > > FPGA(STEP_PULSE_LENGTH_ADD)= 62;// + 0x80;
> > >
> > > I have tried both with and without bit 7 to change the polarity. But it doesn't seem to make any difference.
> > >
> > > I have also thought perhaps the LVTTL output of 3.3v isn't enough, so I've even tried converting the voltage up to 5v, however it doesn't seem to have made any difference.
> > >
> > > I can only imagine that either my KFLOP is faulty? Or the above configuration of the axis is incorrect?
> > >
> > > Does anyone have any thoughts on where I should go from here? I've come up against a wall now...
> > >
> > > I have also posted on the forum from where I got the driver board/CNC kit. The forum post there is:
> > > http://forums.zentoolworks.com/viewtopic.php?f=11&t=2042
> > >
> > > Any help or suggestions would be appreciated!
> > > Thanks
> > >
> > > Josh
> > >
> >
>

--- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@...> wrote:
>
> That will also limit you to relatively slow step rates, which may mean slow rapid speeds....
>
> Regards,
> Ray L.
>
> --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> >
> > On your advice, I've tried hooking up an Arduino instead of the KFLOP to the pins. You're right, the min pulse width for this particular board appears to be around 90us with 16x microstepping, and much higher with no microstepping enabled.
> >
> > I guess my only hope is to find custom firmware? or find a stepper driver that supports 4us?
> >
> >
> > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > >
> > > Hi Tom,
> > >
> > > Thanks for your diagnosis, I had a feeling it was going to be something like that. I've been looking for somewhere to get that information from. Thanks for hunting it down!
> > >
> > > I guess the question is... Is it possible to get a version of the kflop firmware that supports a broader range of pulse widths?
> > >
> > > Thanks Tom
> > >
> > > Josh
> > >
> > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > >
> > > > Hi Josh,
> > > >
> > > > It looks like the TB6560 has a minimum Step Pulse time of 30us.  KFLOP has a max step pulse time of 3.78us. 
> > > >
> > > >
> > > > http://www.toshiba.com/taec/components2/Datasheet_Sync/382/27885.pdf
> > > >
> > > > I can't think of a simple solution.
> > > >
> > > >
> > > > When you were driving with the LPT what pulse width were you using?
> > > >
> > > >
> > > > Regards
> > > > TK
> > > >
> > > >
> > > >
> > > >
> > > > ________________________________
> > > > From: inbilla <inbilla@>
> > > > To: DynoMotion@yahoogroups.com
> > > > Sent: Friday, June 22, 2012 11:27 PM
> > > > Subject: [DynoMotion] KFLOP issues driving an LPT driver board TB6560
> > > >
> > > >
> > > >  
> > > > Hi There,
> > > >
> > > > I am currently having issues getting the KFLOP to drive my stepper motors for my CNC. The driver board is based on the TB6560 amplifier, and is usually connected to an LPT Port.
> > > >
> > > > I have created a board to map JP7 to the LPT port header appropriately, and all the signals look fine. However, when I attempt to step the motors using KMotionCNC, the steppers seem to stutter back and forth, and don't work properly.
> > > >
> > > > I have found that stepping at slower speeds tends to result in stutter. Stepping at higher speeds will stall the motors (expected). And stepping at medium speeds will sometimes work nicely.
> > > >
> > > > I currently have one axis configured. The following is the C code for that:
> > > >
> > > > ch0->InputMode=NO_INPUT_MODE;
> > > > ch0->OutputMode=STEP_DIR_MODE;
> > > > ch0->Vel=3000;
> > > > ch0->Accel=2e+005;
> > > > ch0->Jerk=1e+008;
> > > > ch0->P=0;
> > > > ch0->I=0.01;
> > > > ch0->D=0;
> > > > ch0->FFAccel=0;
> > > > ch0->FFVel=0;
> > > > ch0->MaxI=200;
> > > > ch0->MaxErr=1e+006;
> > > > ch0->MaxOutput=200;
> > > > ch0->DeadBandGain=1;
> > > > ch0->DeadBandRange=0;
> > > > ch0->InputChan0=0;
> > > > ch0->InputChan1=0;
> > > > ch0->OutputChan0=8;
> > > > ch0->OutputChan1=0;
> > > > ch0->MasterAxis=-1;
> > > > ch0->LimitSwitchOptions=0x7070020;//0x7070003;
> > > > ch0->InputGain0=1;
> > > > ch0->InputGain1=1;
> > > > ch0->InputOffset0=0;
> > > > ch0->InputOffset1=0;
> > > > ch0->OutputGain=-1;
> > > > ch0->OutputOffset=0;
> > > > ch0->SlaveGain=1;
> > > > ch0->BacklashMode=BACKLASH_OFF;
> > > > ch0->BacklashAmount=549;
> > > > ch0->BacklashRate=1;
> > > > ch0->invDistPerCycle=1;
> > > > ch0->Lead=0;
> > > > ch0->MaxFollowingError=1000000000;
> > > > ch0->StepperAmplitude=20;
> > > >
> > > > ch0->iir[0].B0=1;
> > > > ch0->iir[0].B1=0;
> > > > ch0->iir[0].B2=0;
> > > > ch0->iir[0].A1=0;
> > > > ch0->iir[0].A2=0;
> > > >
> > > > ch0->iir[1].B0=1;
> > > > ch0->iir[1].B1=0;
> > > > ch0->iir[1].B2=0;
> > > > ch0->iir[1].A1=0;
> > > > ch0->iir[1].A2=0;
> > > >
> > > > ch0->iir[2].B0=0.000769;
> > > > ch0->iir[2].B1=0.001538;
> > > > ch0->iir[2].B2=0.000769;
> > > > ch0->iir[2].A1=1.92076;
> > > > ch0->iir[2].A2=-0.923833;
> > > >
> > > > I thought perhaps the step pulse width, and/or polarity weren't right for this board, so I added the following line too:
> > > >
> > > > FPGA(STEP_PULSE_LENGTH_ADD)= 62;// + 0x80;
> > > >
> > > > I have tried both with and without bit 7 to change the polarity. But it doesn't seem to make any difference.
> > > >
> > > > I have also thought perhaps the LVTTL output of 3.3v isn't enough, so I've even tried converting the voltage up to 5v, however it doesn't seem to have made any difference.
> > > >
> > > > I can only imagine that either my KFLOP is faulty? Or the above configuration of the axis is incorrect?
> > > >
> > > > Does anyone have any thoughts on where I should go from here? I've come up against a wall now...
> > > >
> > > > I have also posted on the forum from where I got the driver board/CNC kit. The forum post there is:
> > > > http://forums.zentoolworks.com/viewtopic.php?f=11&t=2042
> > > >
> > > > Any help or suggestions would be appreciated!
> > > > Thanks
> > > >
> > > > Josh
> > > >
> > >
> >
>

--- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@...> wrote:
>
> Yeah, it's really strange.
>
> I can view the pulses coming from Mach3 in Parallel port mode, and they're 4us. The stepper appears to work fine, and is quite smooth...
>
> This isn't really making sense.
>
> --- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@> wrote:
> >
> > That will also limit you to relatively slow step rates, which may mean slow rapid speeds....
> >
> > Regards,
> > Ray L.
> >
> > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > >
> > > On your advice, I've tried hooking up an Arduino instead of the KFLOP to the pins. You're right, the min pulse width for this particular board appears to be around 90us with 16x microstepping, and much higher with no microstepping enabled.
> > >
> > > I guess my only hope is to find custom firmware? or find a stepper driver that supports 4us?
> > >
> > >
> > > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > > >
> > > > Hi Tom,
> > > >
> > > > Thanks for your diagnosis, I had a feeling it was going to be something like that. I've been looking for somewhere to get that information from. Thanks for hunting it down!
> > > >
> > > > I guess the question is... Is it possible to get a version of the kflop firmware that supports a broader range of pulse widths?
> > > >
> > > > Thanks Tom
> > > >
> > > > Josh
> > > >
> > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > > >
> > > > > Hi Josh,
> > > > >
> > > > > It looks like the TB6560 has a minimum Step Pulse time of 30us.  KFLOP has a max step pulse time of 3.78us. 
> > > > >
> > > > >
> > > > > http://www.toshiba.com/taec/components2/Datasheet_Sync/382/27885.pdf
> > > > >
> > > > > I can't think of a simple solution.
> > > > >
> > > > >
> > > > > When you were driving with the LPT what pulse width were you using?
> > > > >
> > > > >
> > > > > Regards
> > > > > TK
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > ________________________________
> > > > > From: inbilla <inbilla@>
> > > > > To: DynoMotion@yahoogroups.com
> > > > > Sent: Friday, June 22, 2012 11:27 PM
> > > > > Subject: [DynoMotion] KFLOP issues driving an LPT driver board TB6560
> > > > >
> > > > >
> > > > >  
> > > > > Hi There,
> > > > >
> > > > > I am currently having issues getting the KFLOP to drive my stepper motors for my CNC. The driver board is based on the TB6560 amplifier, and is usually connected to an LPT Port.
> > > > >
> > > > > I have created a board to map JP7 to the LPT port header appropriately, and all the signals look fine. However, when I attempt to step the motors using KMotionCNC, the steppers seem to stutter back and forth, and don't work properly.
> > > > >
> > > > > I have found that stepping at slower speeds tends to result in stutter. Stepping at higher speeds will stall the motors (expected). And stepping at medium speeds will sometimes work nicely.
> > > > >
> > > > > I currently have one axis configured. The following is the C code for that:
> > > > >
> > > > > ch0->InputMode=NO_INPUT_MODE;
> > > > > ch0->OutputMode=STEP_DIR_MODE;
> > > > > ch0->Vel=3000;
> > > > > ch0->Accel=2e+005;
> > > > > ch0->Jerk=1e+008;
> > > > > ch0->P=0;
> > > > > ch0->I=0.01;
> > > > > ch0->D=0;
> > > > > ch0->FFAccel=0;
> > > > > ch0->FFVel=0;
> > > > > ch0->MaxI=200;
> > > > > ch0->MaxErr=1e+006;
> > > > > ch0->MaxOutput=200;
> > > > > ch0->DeadBandGain=1;
> > > > > ch0->DeadBandRange=0;
> > > > > ch0->InputChan0=0;
> > > > > ch0->InputChan1=0;
> > > > > ch0->OutputChan0=8;
> > > > > ch0->OutputChan1=0;
> > > > > ch0->MasterAxis=-1;
> > > > > ch0->LimitSwitchOptions=0x7070020;//0x7070003;
> > > > > ch0->InputGain0=1;
> > > > > ch0->InputGain1=1;
> > > > > ch0->InputOffset0=0;
> > > > > ch0->InputOffset1=0;
> > > > > ch0->OutputGain=-1;
> > > > > ch0->OutputOffset=0;
> > > > > ch0->SlaveGain=1;
> > > > > ch0->BacklashMode=BACKLASH_OFF;
> > > > > ch0->BacklashAmount=549;
> > > > > ch0->BacklashRate=1;
> > > > > ch0->invDistPerCycle=1;
> > > > > ch0->Lead=0;
> > > > > ch0->MaxFollowingError=1000000000;
> > > > > ch0->StepperAmplitude=20;
> > > > >
> > > > > ch0->iir[0].B0=1;
> > > > > ch0->iir[0].B1=0;
> > > > > ch0->iir[0].B2=0;
> > > > > ch0->iir[0].A1=0;
> > > > > ch0->iir[0].A2=0;
> > > > >
> > > > > ch0->iir[1].B0=1;
> > > > > ch0->iir[1].B1=0;
> > > > > ch0->iir[1].B2=0;
> > > > > ch0->iir[1].A1=0;
> > > > > ch0->iir[1].A2=0;
> > > > >
> > > > > ch0->iir[2].B0=0.000769;
> > > > > ch0->iir[2].B1=0.001538;
> > > > > ch0->iir[2].B2=0.000769;
> > > > > ch0->iir[2].A1=1.92076;
> > > > > ch0->iir[2].A2=-0.923833;
> > > > >
> > > > > I thought perhaps the step pulse width, and/or polarity weren't right for this board, so I added the following line too:
> > > > >
> > > > > FPGA(STEP_PULSE_LENGTH_ADD)= 62;// + 0x80;
> > > > >
> > > > > I have tried both with and without bit 7 to change the polarity. But it doesn't seem to make any difference.
> > > > >
> > > > > I have also thought perhaps the LVTTL output of 3.3v isn't enough, so I've even tried converting the voltage up to 5v, however it doesn't seem to have made any difference.
> > > > >
> > > > > I can only imagine that either my KFLOP is faulty? Or the above configuration of the axis is incorrect?
> > > > >
> > > > > Does anyone have any thoughts on where I should go from here? I've come up against a wall now...
> > > > >
> > > > > I have also posted on the forum from where I got the driver board/CNC kit. The forum post there is:
> > > > > http://forums.zentoolworks.com/viewtopic.php?f=11&t=2042
> > > > >
> > > > > Any help or suggestions would be appreciated!
> > > > > Thanks
> > > > >
> > > > > Josh
> > > > >
> > > >
> > >
> >
>

--- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@...> wrote:
>
> Have you tried flipping the polarity?
>
> Regards,
> Ray L.
>
> --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> >
> > Yeah, it's really strange.
> >
> > I can view the pulses coming from Mach3 in Parallel port mode, and they're 4us. The stepper appears to work fine, and is quite smooth...
> >
> > This isn't really making sense.
> >
> > --- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@> wrote:
> > >
> > > That will also limit you to relatively slow step rates, which may mean slow rapid speeds....
> > >
> > > Regards,
> > > Ray L.
> > >
> > > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > > >
> > > > On your advice, I've tried hooking up an Arduino instead of the KFLOP to the pins. You're right, the min pulse width for this particular board appears to be around 90us with 16x microstepping, and much higher with no microstepping enabled.
> > > >
> > > > I guess my only hope is to find custom firmware? or find a stepper driver that supports 4us?
> > > >
> > > >
> > > > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > > > >
> > > > > Hi Tom,
> > > > >
> > > > > Thanks for your diagnosis, I had a feeling it was going to be something like that. I've been looking for somewhere to get that information from. Thanks for hunting it down!
> > > > >
> > > > > I guess the question is... Is it possible to get a version of the kflop firmware that supports a broader range of pulse widths?
> > > > >
> > > > > Thanks Tom
> > > > >
> > > > > Josh
> > > > >
> > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > > > >
> > > > > > Hi Josh,
> > > > > >
> > > > > > It looks like the TB6560 has a minimum Step Pulse time of 30us.  KFLOP has a max step pulse time of 3.78us. 
> > > > > >
> > > > > >
> > > > > > http://www.toshiba.com/taec/components2/Datasheet_Sync/382/27885.pdf
> > > > > >
> > > > > > I can't think of a simple solution.
> > > > > >
> > > > > >
> > > > > > When you were driving with the LPT what pulse width were you using?
> > > > > >
> > > > > >
> > > > > > Regards
> > > > > > TK
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > ________________________________
> > > > > > From: inbilla <inbilla@>
> > > > > > To: DynoMotion@yahoogroups.com
> > > > > > Sent: Friday, June 22, 2012 11:27 PM
> > > > > > Subject: [DynoMotion] KFLOP issues driving an LPT driver board TB6560
> > > > > >
> > > > > >
> > > > > >  
> > > > > > Hi There,
> > > > > >
> > > > > > I am currently having issues getting the KFLOP to drive my stepper motors for my CNC. The driver board is based on the TB6560 amplifier, and is usually connected to an LPT Port.
> > > > > >
> > > > > > I have created a board to map JP7 to the LPT port header appropriately, and all the signals look fine. However, when I attempt to step the motors using KMotionCNC, the steppers seem to stutter back and forth, and don't work properly.
> > > > > >
> > > > > > I have found that stepping at slower speeds tends to result in stutter. Stepping at higher speeds will stall the motors (expected). And stepping at medium speeds will sometimes work nicely.
> > > > > >
> > > > > > I currently have one axis configured. The following is the C code for that:
> > > > > >
> > > > > > ch0->InputMode=NO_INPUT_MODE;
> > > > > > ch0->OutputMode=STEP_DIR_MODE;
> > > > > > ch0->Vel=3000;
> > > > > > ch0->Accel=2e+005;
> > > > > > ch0->Jerk=1e+008;
> > > > > > ch0->P=0;
> > > > > > ch0->I=0.01;
> > > > > > ch0->D=0;
> > > > > > ch0->FFAccel=0;
> > > > > > ch0->FFVel=0;
> > > > > > ch0->MaxI=200;
> > > > > > ch0->MaxErr=1e+006;
> > > > > > ch0->MaxOutput=200;
> > > > > > ch0->DeadBandGain=1;
> > > > > > ch0->DeadBandRange=0;
> > > > > > ch0->InputChan0=0;
> > > > > > ch0->InputChan1=0;
> > > > > > ch0->OutputChan0=8;
> > > > > > ch0->OutputChan1=0;
> > > > > > ch0->MasterAxis=-1;
> > > > > > ch0->LimitSwitchOptions=0x7070020;//0x7070003;
> > > > > > ch0->InputGain0=1;
> > > > > > ch0->InputGain1=1;
> > > > > > ch0->InputOffset0=0;
> > > > > > ch0->InputOffset1=0;
> > > > > > ch0->OutputGain=-1;
> > > > > > ch0->OutputOffset=0;
> > > > > > ch0->SlaveGain=1;
> > > > > > ch0->BacklashMode=BACKLASH_OFF;
> > > > > > ch0->BacklashAmount=549;
> > > > > > ch0->BacklashRate=1;
> > > > > > ch0->invDistPerCycle=1;
> > > > > > ch0->Lead=0;
> > > > > > ch0->MaxFollowingError=1000000000;
> > > > > > ch0->StepperAmplitude=20;
> > > > > >
> > > > > > ch0->iir[0].B0=1;
> > > > > > ch0->iir[0].B1=0;
> > > > > > ch0->iir[0].B2=0;
> > > > > > ch0->iir[0].A1=0;
> > > > > > ch0->iir[0].A2=0;
> > > > > >
> > > > > > ch0->iir[1].B0=1;
> > > > > > ch0->iir[1].B1=0;
> > > > > > ch0->iir[1].B2=0;
> > > > > > ch0->iir[1].A1=0;
> > > > > > ch0->iir[1].A2=0;
> > > > > >
> > > > > > ch0->iir[2].B0=0.000769;
> > > > > > ch0->iir[2].B1=0.001538;
> > > > > > ch0->iir[2].B2=0.000769;
> > > > > > ch0->iir[2].A1=1.92076;
> > > > > > ch0->iir[2].A2=-0.923833;
> > > > > >
> > > > > > I thought perhaps the step pulse width, and/or polarity weren't right for this board, so I added the following line too:
> > > > > >
> > > > > > FPGA(STEP_PULSE_LENGTH_ADD)= 62;// + 0x80;
> > > > > >
> > > > > > I have tried both with and without bit 7 to change the polarity. But it doesn't seem to make any difference.
> > > > > >
> > > > > > I have also thought perhaps the LVTTL output of 3.3v isn't enough, so I've even tried converting the voltage up to 5v, however it doesn't seem to have made any difference.
> > > > > >
> > > > > > I can only imagine that either my KFLOP is faulty? Or the above configuration of the axis is incorrect?
> > > > > >
> > > > > > Does anyone have any thoughts on where I should go from here? I've come up against a wall now...
> > > > > >
> > > > > > I have also posted on the forum from where I got the driver board/CNC kit. The forum post there is:
> > > > > > http://forums.zentoolworks.com/viewtopic.php?f=11&t=2042
> > > > > >
> > > > > > Any help or suggestions would be appreciated!
> > > > > > Thanks
> > > > > >
> > > > > > Josh
> > > > > >
> > > > >
> > > >
> > >
> >
>

--- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@...> wrote:
>
> Thanks for the thoughts,
>
> Yeah, I've tried flipping the polarity (both when trying to get Mach3/LPT to work, and getting KMotionCNC/KFLOP to work).
>
> Having it inverted (idle high, pulse low) does give better results. But they still aren't reliable results. Especially at low speeds the motors tend to stutter.
>
> The more I think about it and attempt to get it to work, the more it seems I need to increase the pulse width. The Arduino output was so smooth when the pulse was wider. I'm beginning to wonder if I can put a circuit between the boards and convert the pulse widths?
>
> Josh
>
> --- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@> wrote:
> >
> > Have you tried flipping the polarity?
> >
> > Regards,
> > Ray L.
> >
> > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > >
> > > Yeah, it's really strange.
> > >
> > > I can view the pulses coming from Mach3 in Parallel port mode, and they're 4us. The stepper appears to work fine, and is quite smooth...
> > >
> > > This isn't really making sense.
> > >
> > > --- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@> wrote:
> > > >
> > > > That will also limit you to relatively slow step rates, which may mean slow rapid speeds....
> > > >
> > > > Regards,
> > > > Ray L.
> > > >
> > > > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > > > >
> > > > > On your advice, I've tried hooking up an Arduino instead of the KFLOP to the pins. You're right, the min pulse width for this particular board appears to be around 90us with 16x microstepping, and much higher with no microstepping enabled.
> > > > >
> > > > > I guess my only hope is to find custom firmware? or find a stepper driver that supports 4us?
> > > > >
> > > > >
> > > > > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > > > > >
> > > > > > Hi Tom,
> > > > > >
> > > > > > Thanks for your diagnosis, I had a feeling it was going to be something like that. I've been looking for somewhere to get that information from. Thanks for hunting it down!
> > > > > >
> > > > > > I guess the question is... Is it possible to get a version of the kflop firmware that supports a broader range of pulse widths?
> > > > > >
> > > > > > Thanks Tom
> > > > > >
> > > > > > Josh
> > > > > >
> > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > > > > >
> > > > > > > Hi Josh,
> > > > > > >
> > > > > > > It looks like the TB6560 has a minimum Step Pulse time of 30us.  KFLOP has a max step pulse time of 3.78us. 
> > > > > > >
> > > > > > >
> > > > > > > http://www.toshiba.com/taec/components2/Datasheet_Sync/382/27885.pdf
> > > > > > >
> > > > > > > I can't think of a simple solution.
> > > > > > >
> > > > > > >
> > > > > > > When you were driving with the LPT what pulse width were you using?
> > > > > > >
> > > > > > >
> > > > > > > Regards
> > > > > > > TK
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > ________________________________
> > > > > > > From: inbilla <inbilla@>
> > > > > > > To: DynoMotion@yahoogroups.com
> > > > > > > Sent: Friday, June 22, 2012 11:27 PM
> > > > > > > Subject: [DynoMotion] KFLOP issues driving an LPT driver board TB6560
> > > > > > >
> > > > > > >
> > > > > > >  
> > > > > > > Hi There,
> > > > > > >
> > > > > > > I am currently having issues getting the KFLOP to drive my stepper motors for my CNC. The driver board is based on the TB6560 amplifier, and is usually connected to an LPT Port.
> > > > > > >
> > > > > > > I have created a board to map JP7 to the LPT port header appropriately, and all the signals look fine. However, when I attempt to step the motors using KMotionCNC, the steppers seem to stutter back and forth, and don't work properly.
> > > > > > >
> > > > > > > I have found that stepping at slower speeds tends to result in stutter. Stepping at higher speeds will stall the motors (expected). And stepping at medium speeds will sometimes work nicely.
> > > > > > >
> > > > > > > I currently have one axis configured. The following is the C code for that:
> > > > > > >
> > > > > > > ch0->InputMode=NO_INPUT_MODE;
> > > > > > > ch0->OutputMode=STEP_DIR_MODE;
> > > > > > > ch0->Vel=3000;
> > > > > > > ch0->Accel=2e+005;
> > > > > > > ch0->Jerk=1e+008;
> > > > > > > ch0->P=0;
> > > > > > > ch0->I=0.01;
> > > > > > > ch0->D=0;
> > > > > > > ch0->FFAccel=0;
> > > > > > > ch0->FFVel=0;
> > > > > > > ch0->MaxI=200;
> > > > > > > ch0->MaxErr=1e+006;
> > > > > > > ch0->MaxOutput=200;
> > > > > > > ch0->DeadBandGain=1;
> > > > > > > ch0->DeadBandRange=0;
> > > > > > > ch0->InputChan0=0;
> > > > > > > ch0->InputChan1=0;
> > > > > > > ch0->OutputChan0=8;
> > > > > > > ch0->OutputChan1=0;
> > > > > > > ch0->MasterAxis=-1;
> > > > > > > ch0->LimitSwitchOptions=0x7070020;//0x7070003;
> > > > > > > ch0->InputGain0=1;
> > > > > > > ch0->InputGain1=1;
> > > > > > > ch0->InputOffset0=0;
> > > > > > > ch0->InputOffset1=0;
> > > > > > > ch0->OutputGain=-1;
> > > > > > > ch0->OutputOffset=0;
> > > > > > > ch0->SlaveGain=1;
> > > > > > > ch0->BacklashMode=BACKLASH_OFF;
> > > > > > > ch0->BacklashAmount=549;
> > > > > > > ch0->BacklashRate=1;
> > > > > > > ch0->invDistPerCycle=1;
> > > > > > > ch0->Lead=0;
> > > > > > > ch0->MaxFollowingError=1000000000;
> > > > > > > ch0->StepperAmplitude=20;
> > > > > > >
> > > > > > > ch0->iir[0].B0=1;
> > > > > > > ch0->iir[0].B1=0;
> > > > > > > ch0->iir[0].B2=0;
> > > > > > > ch0->iir[0].A1=0;
> > > > > > > ch0->iir[0].A2=0;
> > > > > > >
> > > > > > > ch0->iir[1].B0=1;
> > > > > > > ch0->iir[1].B1=0;
> > > > > > > ch0->iir[1].B2=0;
> > > > > > > ch0->iir[1].A1=0;
> > > > > > > ch0->iir[1].A2=0;
> > > > > > >
> > > > > > > ch0->iir[2].B0=0.000769;
> > > > > > > ch0->iir[2].B1=0.001538;
> > > > > > > ch0->iir[2].B2=0.000769;
> > > > > > > ch0->iir[2].A1=1.92076;
> > > > > > > ch0->iir[2].A2=-0.923833;
> > > > > > >
> > > > > > > I thought perhaps the step pulse width, and/or polarity weren't right for this board, so I added the following line too:
> > > > > > >
> > > > > > > FPGA(STEP_PULSE_LENGTH_ADD)= 62;// + 0x80;
> > > > > > >
> > > > > > > I have tried both with and without bit 7 to change the polarity. But it doesn't seem to make any difference.
> > > > > > >
> > > > > > > I have also thought perhaps the LVTTL output of 3.3v isn't enough, so I've even tried converting the voltage up to 5v, however it doesn't seem to have made any difference.
> > > > > > >
> > > > > > > I can only imagine that either my KFLOP is faulty? Or the above configuration of the axis is incorrect?
> > > > > > >
> > > > > > > Does anyone have any thoughts on where I should go from here? I've come up against a wall now...
> > > > > > >
> > > > > > > I have also posted on the forum from where I got the driver board/CNC kit. The forum post there is:
> > > > > > > http://forums.zentoolworks.com/viewtopic.php?f=11&t=2042
> > > > > > >
> > > > > > > Any help or suggestions would be appreciated!
> > > > > > > Thanks
> > > > > > >
> > > > > > > Josh
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>

--- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@...> wrote:
>
> But if it works with a narrow pulse on Mach3, there's no reason it should not work with KFlop, unless there's an electrical problem. Have you looked at the waveforms with an o-scope? Perhaps stiff pull-up resistors might help?
>
> Regards,
> Ray L.
>
> --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> >
> > Thanks for the thoughts,
> >
> > Yeah, I've tried flipping the polarity (both when trying to get Mach3/LPT to work, and getting KMotionCNC/KFLOP to work).
> >
> > Having it inverted (idle high, pulse low) does give better results. But they still aren't reliable results. Especially at low speeds the motors tend to stutter.
> >
> > The more I think about it and attempt to get it to work, the more it seems I need to increase the pulse width. The Arduino output was so smooth when the pulse was wider. I'm beginning to wonder if I can put a circuit between the boards and convert the pulse widths?
> >
> > Josh
> >
> > --- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@> wrote:
> > >
> > > Have you tried flipping the polarity?
> > >
> > > Regards,
> > > Ray L.
> > >
> > > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > > >
> > > > Yeah, it's really strange.
> > > >
> > > > I can view the pulses coming from Mach3 in Parallel port mode, and they're 4us. The stepper appears to work fine, and is quite smooth...
> > > >
> > > > This isn't really making sense.
> > > >
> > > > --- In DynoMotion@yahoogroups.com, "himykabibble" <jagboy@> wrote:
> > > > >
> > > > > That will also limit you to relatively slow step rates, which may mean slow rapid speeds....
> > > > >
> > > > > Regards,
> > > > > Ray L.
> > > > >
> > > > > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > > > > >
> > > > > > On your advice, I've tried hooking up an Arduino instead of the KFLOP to the pins. You're right, the min pulse width for this particular board appears to be around 90us with 16x microstepping, and much higher with no microstepping enabled.
> > > > > >
> > > > > > I guess my only hope is to find custom firmware? or find a stepper driver that supports 4us?
> > > > > >
> > > > > >
> > > > > > --- In DynoMotion@yahoogroups.com, "inbilla" <inbilla@> wrote:
> > > > > > >
> > > > > > > Hi Tom,
> > > > > > >
> > > > > > > Thanks for your diagnosis, I had a feeling it was going to be something like that. I've been looking for somewhere to get that information from. Thanks for hunting it down!
> > > > > > >
> > > > > > > I guess the question is... Is it possible to get a version of the kflop firmware that supports a broader range of pulse widths?
> > > > > > >
> > > > > > > Thanks Tom
> > > > > > >
> > > > > > > Josh
> > > > > > >
> > > > > > > --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> > > > > > > >
> > > > > > > > Hi Josh,
> > > > > > > >
> > > > > > > > It looks like the TB6560 has a minimum Step Pulse time of 30us.  KFLOP has a max step pulse time of 3.78us. 
> > > > > > > >
> > > > > > > >
> > > > > > > > http://www.toshiba.com/taec/components2/Datasheet_Sync/382/27885.pdf
> > > > > > > >
> > > > > > > > I can't think of a simple solution.
> > > > > > > >
> > > > > > > >
> > > > > > > > When you were driving with the LPT what pulse width were you using?
> > > > > > > >
> > > > > > > >
> > > > > > > > Regards
> > > > > > > > TK
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > ________________________________
> > > > > > > > From: inbilla <inbilla@>
> > > > > > > > To: DynoMotion@yahoogroups.com
> > > > > > > > Sent: Friday, June 22, 2012 11:27 PM
> > > > > > > > Subject: [DynoMotion] KFLOP issues driving an LPT driver board TB6560
> > > > > > > >
> > > > > > > >
> > > > > > > >  
> > > > > > > > Hi There,
> > > > > > > >
> > > > > > > > I am currently having issues getting the KFLOP to drive my stepper motors for my CNC. The driver board is based on the TB6560 amplifier, and is usually connected to an LPT Port.
> > > > > > > >
> > > > > > > > I have created a board to map JP7 to the LPT port header appropriately, and all the signals look fine. However, when I attempt to step the motors using KMotionCNC, the steppers seem to stutter back and forth, and don't work properly.
> > > > > > > >
> > > > > > > > I have found that stepping at slower speeds tends to result in stutter. Stepping at higher speeds will stall the motors (expected). And stepping at medium speeds will sometimes work nicely.
> > > > > > > >
> > > > > > > > I currently have one axis configured. The following is the C code for that:
> > > > > > > >
> > > > > > > > ch0->InputMode=NO_INPUT_MODE;
> > > > > > > > ch0->OutputMode=STEP_DIR_MODE;
> > > > > > > > ch0->Vel=3000;
> > > > > > > > ch0->Accel=2e+005;
> > > > > > > > ch0->Jerk=1e+008;
> > > > > > > > ch0->P=0;
> > > > > > > > ch0->I=0.01;
> > > > > > > > ch0->D=0;
> > > > > > > > ch0->FFAccel=0;
> > > > > > > > ch0->FFVel=0;
> > > > > > > > ch0->MaxI=200;
> > > > > > > > ch0->MaxErr=1e+006;
> > > > > > > > ch0->MaxOutput=200;
> > > > > > > > ch0->DeadBandGain=1;
> > > > > > > > ch0->DeadBandRange=0;
> > > > > > > > ch0->InputChan0=0;
> > > > > > > > ch0->InputChan1=0;
> > > > > > > > ch0->OutputChan0=8;
> > > > > > > > ch0->OutputChan1=0;
> > > > > > > > ch0->MasterAxis=-1;
> > > > > > > > ch0->LimitSwitchOptions=0x7070020;//0x7070003;
> > > > > > > > ch0->InputGain0=1;
> > > > > > > > ch0->InputGain1=1;
> > > > > > > > ch0->InputOffset0=0;
> > > > > > > > ch0->InputOffset1=0;
> > > > > > > > ch0->OutputGain=-1;
> > > > > > > > ch0->OutputOffset=0;
> > > > > > > > ch0->SlaveGain=1;
> > > > > > > > ch0->BacklashMode=BACKLASH_OFF;
> > > > > > > > ch0->BacklashAmount=549;
> > > > > > > > ch0->BacklashRate=1;
> > > > > > > > ch0->invDistPerCycle=1;
> > > > > > > > ch0->Lead=0;
> > > > > > > > ch0->MaxFollowingError=1000000000;
> > > > > > > > ch0->StepperAmplitude=20;
> > > > > > > >
> > > > > > > > ch0->iir[0].B0=1;
> > > > > > > > ch0->iir[0].B1=0;
> > > > > > > > ch0->iir[0].B2=0;
> > > > > > > > ch0->iir[0].A1=0;
> > > > > > > > ch0->iir[0].A2=0;
> > > > > > > >
> > > > > > > > ch0->iir[1].B0=1;
> > > > > > > > ch0->iir[1].B1=0;
> > > > > > > > ch0->iir[1].B2=0;
> > > > > > > > ch0->iir[1].A1=0;
> > > > > > > > ch0->iir[1].A2=0;
> > > > > > > >
> > > > > > > > ch0->iir[2].B0=0.000769;
> > > > > > > > ch0->iir[2].B1=0.001538;
> > > > > > > > ch0->iir[2].B2=0.000769;
> > > > > > > > ch0->iir[2].A1=1.92076;
> > > > > > > > ch0->iir[2].A2=-0.923833;
> > > > > > > >
> > > > > > > > I thought perhaps the step pulse width, and/or polarity weren't right for this board, so I added the following line too:
> > > > > > > >
> > > > > > > > FPGA(STEP_PULSE_LENGTH_ADD)= 62;// + 0x80;
> > > > > > > >
> > > > > > > > I have tried both with and without bit 7 to change the polarity. But it doesn't seem to make any difference.
> > > > > > > >
> > > > > > > > I have also thought perhaps the LVTTL output of 3.3v isn't enough, so I've even tried converting the voltage up to 5v, however it doesn't seem to have made any difference.
> > > > > > > >
> > > > > > > > I can only imagine that either my KFLOP is faulty? Or the above configuration of the axis is incorrect?
> > > > > > > >
> > > > > > > > Does anyone have any thoughts on where I should go from here? I've come up against a wall now...
> > > > > > > >
> > > > > > > > I have also posted on the forum from where I got the driver board/CNC kit. The forum post there is:
> > > > > > > > http://forums.zentoolworks.com/viewtopic.php?f=11&t=2042
> > > > > > > >
> > > > > > > > Any help or suggestions would be appreciated!
> > > > > > > > Thanks
> > > > > > > >
> > > > > > > > Josh
> > > > > > > >
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