yes i agree with you guys on the timings of mach3, but the stepper motor doesn't know anything about synchronization.
when you tell it to turn, it turns. i want to increase the intensity of the laser in the same time i get the turn command.
i can control the increment and decrement in arduino to have a good intensity modulation.
i could be saying nonsense .
what do you suggest as alternative?!
i am sure there is workaround.
what about this post that i just found :
http://www.machsupport.com/forum/index.php/topic,12444.0.html