simple 2 axis lathe initial lathe set up

[TomKerekes]

I suspect there is noise or the hall signal doesn’t do a clean transition so a transition is being counted multiple times. Do you have an oscilloscope to check it?

Approximately how many degrees is the signal high?

You might add something like a 0.01 second delay in the loop so multiple transitions within that time period will only be counted once.

[turbothis]

i do have a scope but are terrible at setting it up
looks to be about 10 degrees worth of rotation
i am using the bolt head for this. i can mill it down to a much smaller point! makes sense.....
the delay did work but it definitely feels sloppy on the reading

[TomKerekes]

What min max RPM range will you be using?

I don’t think making the sensor target smaller would be helpful.

What do you mean by sloppy?

Because of only 1 pulse per rev the Update and Filter times will need to be set long to have stable readings.

Do you plan to do single point threading?

[turbothis]

ok so it may be the worst looking thing ever! lol
0-1000RPM
just watching the rpm read speed is jumping all sloppy like.
my digital reader is rock solid like the spindle speed

huge yes on threading
i am not afraid of machining out a toothed wheel with like 36 or 72 teeth or what ever divides nicest

[turbothis]

same settings with nothing on
only powered pieces are computer, kflop, and VFD at idle

[TomKerekes]

Multiple teeth would be helpful. With 2 hall sensors with one shifted N + 1/4 pitch from the other would generate a quadrature signal like an encoder so a hardware encoder input could be used.

You might add a ceramic capacitor and a resistor to reduce high frequency noise. Also consider shielded cables.

60/1000 RPM * 10/360 = 1.6 millisecond minimum pulse length

[turbothis]

it is a shielded cable with one end of the drain wire to the ground on JP11

i can pull another encoder from a servo and get that on the spindle for 2000 count and Z pulse. the hall was just a supper simple and easy install so i wanted to try it first

[turbothis]

ok so i am stopping the first idea of a single pulse hall on the spindle. it was a plan of minimal parts and tech but was not hammering out

NOW plan 2!
i am going to just mount my FANUC 10M servo to the spindle by a timing belt. this was the long term idea and is now seems to be the right time
straight 1 to 1 ratio timing belt drive
it has the same 2000 count encoder and now will be an axis right?

does the spindle ( A axis? ) get axis parameters or does the spindle jog C codes do this? or both?

Code: Select all

#include "KMotionDef.h"



int main() {

   
	ch0->InputMode=ENCODER_MODE;
	ch0->OutputMode=DAC_SERVO_MODE;
	ch0->Vel=100;
	ch0->Accel=1000;
	ch0->Jerk=10000;
	ch0->P=1;
	ch0->I=0;
	ch0->D=0;
	ch0->FFAccel=0;
	ch0->FFVel=0;
	ch0->MaxI=200;
	ch0->MaxErr=200;
	ch0->MaxOutput=200;
	ch0->DeadBandGain=1;
	ch0->DeadBandRange=0;
	ch0->InputChan0=0;
	ch0->InputChan1=0;
	ch0->OutputChan0=0;
	ch0->OutputChan1=0;
	ch0->MasterAxis=-1;
	ch0->LimitSwitchOptions=0x100;
	ch0->LimitSwitchNegBit=0;
	ch0->LimitSwitchPosBit=0;
	ch0->SoftLimitPos=1e+09;
	ch0->SoftLimitNeg=-1e+09;
	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=0;
	ch0->BacklashRate=0;
	ch0->invDistPerCycle=1;
	ch0->Lead=0;
	ch0->MaxFollowingError=1000000000;
	ch0->StepperAmplitude=250;

	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=1;
	ch0->iir[2].B1=0;
	ch0->iir[2].B2=0;
	ch0->iir[2].A1=0;
	ch0->iir[2].A2=0;
    

	ch1->InputMode=ENCODER_MODE;
	ch1->OutputMode=DAC_SERVO_MODE;
	ch1->Vel=100;
	ch1->Accel=1000;
	ch1->Jerk=10000;
	ch1->P=1;
	ch1->I=0;
	ch1->D=0;
	ch1->FFAccel=0;
	ch1->FFVel=0;
	ch1->MaxI=200;
	ch1->MaxErr=200;
	ch1->MaxOutput=200;
	ch1->DeadBandGain=1;
	ch1->DeadBandRange=0;
	ch1->InputChan0=1;
	ch1->InputChan1=0;
	ch1->OutputChan0=1;
	ch1->OutputChan1=0;
	ch1->MasterAxis=-1;
	ch1->LimitSwitchOptions=0x100;
	ch1->LimitSwitchNegBit=0;
	ch1->LimitSwitchPosBit=0;
	ch1->SoftLimitPos=1e+09;
	ch1->SoftLimitNeg=-1e+09;
	ch1->InputGain0=1;
	ch1->InputGain1=1;
	ch1->InputOffset0=0;
	ch1->InputOffset1=0;
	ch1->OutputGain=1;
	ch1->OutputOffset=0;
	ch1->SlaveGain=1;
	ch1->BacklashMode=BACKLASH_OFF;
	ch1->BacklashAmount=0;
	ch1->BacklashRate=0;
	ch1->invDistPerCycle=1;
	ch1->Lead=0;
	ch1->MaxFollowingError=1000000000;
	ch1->StepperAmplitude=250;

	ch1->iir[0].B0=1;
	ch1->iir[0].B1=0;
	ch1->iir[0].B2=0;
	ch1->iir[0].A1=0;
	ch1->iir[0].A2=0;

	ch1->iir[1].B0=1;
	ch1->iir[1].B1=0;
	ch1->iir[1].B2=0;
	ch1->iir[1].A1=0;
	ch1->iir[1].A2=0;

	ch1->iir[2].B0=1;
	ch1->iir[2].B1=0;
	ch1->iir[2].B2=0;
	ch1->iir[2].A1=0;
	ch1->iir[2].A2=0;
	
	
	ch0->InputMode=ENCODER_MODE;
	ch2->OutputMode=DAC_SERVO_MODE;
	ch2->Vel=100;
	ch2->Accel=1000;
	ch2->Jerk=10000;
	ch2->P=1;
	ch2->I=0;
	ch2->D=0;
	ch2->FFAccel=0;
	ch2->FFVel=0;
	ch2->MaxI=200;
	ch2->MaxErr=200;
	ch2->MaxOutput=200;
	ch2->DeadBandGain=1;
	ch2->DeadBandRange=0;
	ch2->InputChan0=2;
	ch2->InputChan1=0;
	ch2->OutputChan0=2;
	ch2->OutputChan1=0;
	ch2->MasterAxis=-1;
	ch2->LimitSwitchOptions=0x100;
	ch2->LimitSwitchNegBit=0;
	ch2->LimitSwitchPosBit=0;
	ch2->SoftLimitPos=1e+09;
	ch2->SoftLimitNeg=-1e+09;
	ch2->InputGain0=1;
	ch2->InputGain1=1;
	ch2->InputOffset0=0;
	ch2->InputOffset1=0;
	ch2->OutputGain=1;
	ch2->OutputOffset=0;
	ch2->SlaveGain=1;
	ch2->BacklashMode=BACKLASH_OFF;
	ch2->BacklashAmount=0;
	ch2->BacklashRate=0;
	ch2->invDistPerCycle=1;
	ch2->Lead=0;
	ch2->MaxFollowingError=1000000000;
	ch2->StepperAmplitude=250;

	ch2->iir[0].B0=1;
	ch2->iir[0].B1=0;
	ch2->iir[0].B2=0;
	ch2->iir[0].A1=0;
	ch2->iir[0].A2=0;

	ch2->iir[1].B0=1;
	ch2->iir[1].B1=0;
	ch2->iir[1].B2=0;
	ch2->iir[1].A1=0;
	ch2->iir[1].A2=0;

	ch2->iir[2].B0=1;
	ch2->iir[2].B1=0;
	ch2->iir[2].B2=0;
	ch2->iir[2].A1=0;
	ch2->iir[2].A2=0;
	
	EnableAxis(0);
    EnableAxis(1);
    EnableAxis(2);

	DefineCoordSystem(0,-1,1,2);
    
    }

[TomKerekes]

does the spindle ( A axis? ) get axis parameters or does the spindle jog C codes do this? or both?

If the Axis is included in the Coordinate System as you have shown it will operate like an A Axis and Spindle Jog Commands should not be used.

If it is excluded from the Coordinate System then it can be operated as a Spindle with Jog Commands.

You can create M Codes to add or remove it from the Coordinate System to switch modes on the fly.

[turbothis]

excellent
i am excited to murder my next code together with chatbot
thanks tom!