I actually knew about the different cabling on the board - in fact I made the cable for the RAMPS with the signal on one end. At the endstop end, the ultimaker endstops' pins have exactly the same configuration of the reprap endstops' pins, that's why I assumed they were the same. My testing says that they are not the same, and only the ultimakers' endstops work with the ultimaker. I have not tby syncra - RAMPS Electronics
Many thanks guys, I really appreciate the ideas. I actually assumed that some reprap endstops I had where identical to the one I bought from Ultimaker - and they were not!! they look the same and the connections are the same, but the reprap ones I had do not work with RAMPS (also if they worked with other GEN3), whether the ones shipped by Ultimaker (with the RAMPS) actually work. I feel a bitby syncra - RAMPS Electronics
Hi there, I've just built a Huxley type of reprap and connected the x,y,z motors and relative end opto stops to RAMPS. The bot moves axis in the positive direction but not in the negative, as if the opto stops where interrupted by something in the middle. I double checked the wire connections and they are right. Any idea why this might happen? Many thanks to anybody that can help!by syncra - RAMPS Electronics