I’m making an engraving machine with a larger area than the original k40.
I have a k40 from which I take the laser tube, the power supply and the front panel.
My idea was to also take the engines of the original (the frame is in 30x30 aluminum profiles like the workbee or the x-carve) but unfortunately the transverse structure is too heavy (about 2-3 kg) and only one engine to the y axis it generates friction.
I tried with two larger external 3d printer engines connected to a single a4988 driver with arduino ramps controller and it seems to work properly but I do not trust this controller and it seems really slow
So I ordered a cohesion board but before it comes as I think I would like to confirm that everything is right and that there are no problems or fry the board
Here my pinout diagram
1- Can it work without the motors losing step or power?
2- I wanted to replace the optical end stops with the mechanical ones, is it OK to connect them like that?
3- if you take the 24v from the external power supply and the 5v from the usb connected to the computer do I have to remove the 24v and 5v cable from the k40?
4- Do I have to change the firmware if I have this connection?
thanks a lot