Combined CNC Engraving Technologies. Spindle + Laser

[JJWMACHINECO]

We only drive each Nichia at 1.7a each. That is the max the Data sheet recommends. We never tried wiring 2 diodes in series to one driver, so I can not answer that question. LD's are expensive to replace, so experiment at your own risk. We only have used a dual driver or two single drivers for driving the two Nichia's.

We have Lasorbs on all of our Laser Diode engravers.

Here is our new updated PDF if it will help you any. It has a schematic for the DAC and where to buy the Digital Potentiometer.

http://www.picengrave.com/Pic%20Prog...r%20Setups.pdf

Search here for Laser Diode driver schematics. There is allot of information in the Sam's Laser FAQ.

http://lmgtfy.com/?q=analog+modulati...iver+schematic

The DAC is 8bit (256) resolution for modulation voltage change between the 0-5v. The encoder is 10bit (1024) That's four times finer incremental voltage changes. It must be one of these US Digital MA3 absolute magnetic shaft encoders. We are not familiar with the Galil board, but if it has step and direction pins/ports, a DAC can be wired to it or another stepper/servo motor and controller to drive a MA3 encoder.