Dynomotion

Group: DynoMotion Message: 1700 From: granado_granado Date: 8/18/2011
Subject: Kflop & Gecko drivers
I don't understand really well how to configure kflop to work in open loop with steppers and gecko driver.
I have read in the "Step an Direction Set up": "Setting Bit-7 hight will invert the step output...", but where and how I can configure that?

Could someone post an example of .mot configuration file for gecko drivers.

THanks!
Group: DynoMotion Message: 1704 From: Tom Kerekes Date: 8/18/2011
Subject: Re: Kflop & Gecko drivers
 
Hi Granado,
 
The older Geckos work best with a wide 4us negative going Step Pulse as they step on the rising edge and this also gives more than 4us of setup for the Direction signal.  To configure for this you must execute the following line of C code which can be added to your Init.c Program.  Once executed the Step/Dir Generators will remain in this mode until the next power cycle.

 FPGA(STEP_PULSE_LENGTH_ADD)=63 + 0x80;   // set the pulse time to ~ 4us and pulse the Step low
You can use the SimpleStepDirAxis0.mot axis channel configuration for Geckos to drive them in open collector (sink current) mode.
 
HTH
TK 
 

--- On Thu, 8/18/11, granado_granado <granado@...> wrote:

From: granado_granado <granado@...>
Subject: [DynoMotion] Kflop & Gecko drivers
To: DynoMotion@yahoogroups.com
Date: Thursday, August 18, 2011, 5:21 AM

 
I don't understand really well how to configure kflop to work in open loop with steppers and gecko driver.
I have read in the "Step an Direction Set up": "Setting Bit-7 hight will invert the step output...", but where and how I can configure that?

Could someone post an example of .mot configuration file for gecko drivers.

THanks!
Group: DynoMotion Message: 1708 From: granado_granado Date: 8/19/2011
Subject: Re: Kflop & Gecko drivers
Thanks!

--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
>  
> Hi Granado,
>  
> The older Geckos work best with a wide 4us negative going Step Pulse as they step on the rising edge and this also gives more than 4us of setup for the Direction signal.  To configure for this you must execute the following line of C code which can be added to your Init.c Program.  Once executed the Step/Dir Generators will remain in this mode until the next power cycle.
>
>  FPGA(STEP_PULSE_LENGTH_ADD)=63 + 0x80;   // set the pulse time to ~ 4us and pulse the Step low
>
> You can use the SimpleStepDirAxis0.mot axis channel configuration for Geckos to drive them in open collector (sink current) mode.
>  
> HTH
> TK 
>  
>
> --- On Thu, 8/18/11, granado_granado <granado@...> wrote:
>
>
> From: granado_granado <granado@...>
> Subject: [DynoMotion] Kflop & Gecko drivers
> To: DynoMotion@yahoogroups.com
> Date: Thursday, August 18, 2011, 5:21 AM
>
>
>  
>
>
>
> I don't understand really well how to configure kflop to work in open loop with steppers and gecko driver.
> I have read in the "Step an Direction Set up": "Setting Bit-7 hight will invert the step output...", but where and how I can configure that?
>
> Could someone post an example of .mot configuration file for gecko drivers.
>
> THanks!
>