Hi All - Just completed build of my MPCNC and doing the movement test with the LCD connected to Rambo 1.4. Z works fine, but on X and Y, only the first motor is moving as expected on each axis, the Second ones connected to E0 and E1are not moving at all. I do have the 4 ends tops wired in. I am Using the Rambo 1.4 Kit ordered from V1.
Historically this problem would occur when the wrong firmware was installed. Serial wiring and serial firmware only use three drivers (X, Y & Z). It is my understanding that V1 is no longer shipping any sort of serial firmware or wiring harness, so if you made the purchase recently, this is unlike to be the problem. Still, you should take a look at the version on the display when you boot the control board. It should have a ‘D’ at the end meaning dual endstop firmware.
Another thing you can do to troubleshoot the problem is to swap X1 and X2 as well as Y1 and Y2 connections at the control board and re-run your test. If the problem stays with the same motor, then it is highly likely a wiring issue. If the problem moves to a different motor, then you have a firmware or possibly driver issue.
I’m on that list Replacing broken Rambo with new and was struggling with the same thing. E0/E1 motors would not move. Checked now and the version is also 510S. Off to figure out how to flash now.
I sent an email out to every person I shipped one of those boards to and it has a list of options and all the links you will need. Have a look at your spam box.