MPCNC dual xxyy endstops + 3D/laser/spindle

Mostly Printed CNC - MPCNC Hardware Development
1

Hi all,

 

I’m needing to work a bit on my electronics.

At the moment I use frequently 3D/laser/cnc tools on my MPCNC but:

1- need to drop 12v to 5v on fan extender D11 to use TTL on my laser (max is 5v)

2- external driver for the spindle uses a pot that I want to replace with pwm control

3- ramps boar is short of one stepper driver to use dual xx and yy and still have an extruder

 

So my idea is shown on the attached image. I am unsure of the layout and would like to ask if it makes sense.

 

Thank you all,

Joao

mpcncdualxxyydrive-3d-laser-spindle-layout.jpg
mpcncdualxxyydrive-3d-laser-spindle-layout.jpg2326×1630 1.27 MB

2

a) is your spindle PSU 12V tolerant?
b) what does the little red board with D2 do?
c) the big red board is just a breakout for the drivers?

That all seems reasonable with the right pins.h. I’m not familiar enough to know which of those aux pins can be used for what.

3

Hello Jeff,

The spindle runs from 12 to 48v. The actual psu that came with it is a 12v 50A. The pwm input to drive it is a 12v one too.

The small red board is a fan extender for ramps. Currently I run a fan and the laser from it but that gives me a 12v pwm pin that I have to step down to 5vmax

The big red board is a cnc board for arduino that is described in reprap wiki as a cheap way to add more extruder drivers to ramps.

I will have to learn about how to map the pins but at the moment I’m just trying to see if it all makes sense.

I will probably also add a switch between the psu 12v and the spindle and another between psu 12v and laser just as a safety measure.

 

Joao

4

any news