Rambo 1.3 end stop wiring

Sorry, I am a noob here. I am back working on the MPCNC Primo and have the Rambo 1.3. I am trying to figure out the correct wiring and polarity for this board. Do I have to put different firmware on the board as well and how do I tell what I have in the first place as I bought this project used?

I am definitely not saying RTFM, but did you know this exists? I think a lot of your questions are answered there. If they aren’t easily answered, then definitely ask here and we will help you and know more about the docs.

https://docs.v1e.com/electronics/ultimachine/#rambo-13-14

thanks, for some reason I did not know that page existed because I did not know the Rambo was an ultimachine so thanks for the link!!

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The docs aren’t perfect or complete. The forums fill in the gaps. So feel free to post questions here. We don’t bully newbs.

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Sorry, this may be a silly question but I have 4 mechnical endstops hooked up on my MPCNC primo. I have them hooked up correctly to the S and - on my Rambo 1.3 board in a normally closed configuration. Now what are you doing with the Z axis for end stops? First of all do you just use one? do you have a picture of where you mount the limit switch? thanks

Ended up going with just the 4 end stops on both the x and y. Wired normally closed and everything checks out with a multimeter at the end of the wire where it plugs into the board but the end stops do not seem to do anything? what am I missing?

Well, some more progress today. the x and y end stops are working.

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