Laser Control by Spindle PWM

Success.... I can now, via g code, control the intensity of the Laser.

I started with the M67 command but later changed to the M68 command(instant), I am actually trying both to see if there is an appreciable difference.
In the M68 code guild it says:- not synchronized with movement, and they will break blending. ???What is break blending??
Is this a good reason to use the M67 over M68 or would either do??

Yes, I will be editing the Cam Post to accommodate these changes.

Am now working on putting in the DE-bounce coding into the .hal file. have found the entries necessary for this with 3 limit/home switch input pins, eg 10,11+12 the challenge i have is that i only use 1 input for the 3 axis IE pin13. all limit/homes are strung together.
i understand the coding for 3 independent limit/home switches but I'm not even sure it's possible to do this with only 1 pin as the coding seems to be axis specific eg for X axis ...debounce.0.0.out etc . Have tried several variations but no results yet. have you come across this 1 Pin setup with de-bounce before??

Thanks again for the guidance.
Doug

Thanks Andy that clears it up. I will alter the Post to produce the required code.

Any thoughts on the 2nd part . IE:

Am now working on putting in the DE-bounce coding into the .hal file. have found the entries necessary for this with 3 limit/home switch input pins, eg 10,11+12 the challenge i have is that i only use 1 input for the 3 axis IE pin13. all limit/homes are strung together.
i understand the coding for 3 independent limit/home switches but I'm not even sure it's possible to do this with only 1 pin as the coding seems to be axis specific eg for X axis ...debounce.0.0.out etc . Have tried several variations but no results yet. have you come across this 1 Pin setup with de-bounce before??

It may be that I have to use 3 independent limit/home pins instead of just the one.
Thanks again
Doug

thanks Andy will look at that .
will be away with work for a couple of days , will implement when i get back.
Thanks Doug

Hey, may I sneak a quick question in to this topic?

I would like to adjust diode laser power with M67 too - but as it is called analog output do I need additional hardware like a DAC? Or is there an easier way to get PWM out of a parallel port pin without slowing the step planner?

EDIT: Ah, it is hal slang isn't it? I am supposed to net the analog output to a pwmgen and then that to an actual physical parallel output pin right? Any examples where something similar is done?

Am I on the right track with something like this in custom.hal?

Thanks anyway
I have tried it now and it seems to work great. By omitting the frequency and scaling I get



from M67 E0 Q0.5