Endstops

[sfuelberth]

So when I put the endstops on i had them on backwards (the physical switch could not be reached) but I had the white wire on the post closest to the center of the top assembly, so the endstops were essentially wired backwards. I realized this when the z-axis would only lower but not raise. So I pulled the top apart switched the endstop orientation and re-hooked up the wire. However through octoprint using the terminal and issuing the M119 command the endstops are always registering as high. So have I somehow fried the RAMBo or damaged the endstops? Occasionally the endstops register correctly but 90% of the time they are all showing an on reading.

Recv: x_max:H y_max:H z_max:H

The RAMBo seems to be still functioning correctly. Powers the bed, hotend heats up, have not tested the extruder. Any ideas before I reach out to support are appreciated. Thanks.

[Xenocrates]

It is unlikely you've damaged the RAMBO. If you had the NC and NO terminals connected together, there would never be any signal. If you had the wrong and common terminal, then they would output exactly opposite. However, if you accidentally hooked + to sig, that might do bad things (If you didn't redo the crimped ends, which as I recall come pre-done with the Rambo (Or at least I think they did for the V2), then you should be fine). Could you post the specific response you get when you query the endstop status, as sometimes it may show both Min (which will never change), and max endstops, which will.

It is also possible the endstops are damaged. I know that they can be surprisingly fragile and finicky at times, and that the little nub that is the switch can become misaligned and stick in the body in the closed position.

[sfuelberth]

Alright I figured the Rambo is fine. I came home from lunch and unbundled the wires and then the endstops were working correctly. However rebooting the printer again got incorrect reading showing closed when open. I think I may have possibly tightened them to tight originally and possibly damaged the endstops. I think I will just order some replacements and see if that helps.

[sfuelberth]

Actually after finally finding an entry on the RepRap Wiki I re-braided the ends of my endstop wires and this currently seems to have helped with the signal interference that I must have been getting from the motors. I think the importance of the braiding should be emphasised that it is to help reduce signal interference.

[sfuelberth]

So just to update this in case anyone reads this, I did get this working. Double check you wiring, it seems that my ends to the RAMBo from the endstops was not quite good enough. After re-seating the ends going into the RAMBo for the endstops I am now happily printing, I do love the delta.