Combined CNC Engraving Technologies. Spindle + Laser

[Boyan Silyavski]

Thanks Neale,
Meanwhile I have soldered everything as per second diagram.

Now i wonder how to test and adjust everything without burning my BOB or the laser driver. I still dont have the diodes. It seems i have to install the program and start from there.

I still don't understand what these pots do. The one at the output seems to adjust the max voltage output, right? I mean its still not clear how to adjust them.

I am frustrated at the point of freelancing sb to make PCB drawing and even revising all and making me a PCB where double laser driver and this is integrated in one so its very simple to connect and operate. Not sure if there would be enough public for this but i am ready to jump and sale it slowly later or some kickstarter campain.

[Neale]

I still don't understand what these pots do. The one at the output seems to adjust the max voltage output, right? I mean its still not clear how to adjust them.

The pot connected to the input of the 741 is to adjust the output to zero, and the pot at the output is (as you say) to reduce the nominal 0-5V output range to 0-something less, that is, reduce the output swing. I assume that the "digital pot" device has an output range of 0-5V and the output of the 741 will follow this.