Originally Posted by tessen  thanks a lot, but in the first place i´m trying to control the trigger of the laser, i´m read that mach3 can´t engrave because it have slow signal response i would ask if someone can help me about PWM signal or how to do to control the laser like a "Z" axis
thanks |
Hi,
From the images you posted, the laser can be controlled by a 0-5V dc signal or a 0-5V PWM signal. THis means that the laser control input circuitry has a low pass filter in it and a PWM signal as low as 50Hz should be fine.
MAch3 can generate this PWM signal, but the question to be asked is whether the control voltage to the laser needs to be isolated from the Mach3 signals. If it does and you connect the laser input to the parallel port, you may destroy your computer.
So unless you know, it is better to opto-isolate the control signal.
The DigiSpeed DC-03 will convert the Mach3 PWM signal to an isolated 0-5Vdc voltage suitable for controlling the laser.
http://homanndesigns.com/store/index...products_id=21
The manual on the page above shows how to set up Mach for it. If you are specifing the laser powe as a %, say 0-100%, then set up the max spindle speed in Mach to 100rpm. That way id you want 60% power you can use the spindle speed code of: S60
Cheers,
Peter.
Cheers,
Peter.