Y axis moves only one direction

K8200 3D Printer K8200 - Assembly and user manual
1

I’ve just built the printer, connected to Repetier and I have a problem. I have tried swapping X and Y motor connection at the controller board and then the Y motor works fine in both directions and the X motor only goes one way. I have checked the wiring of the Y motor - all is the right way around. All voltages are at about 0.44v on each motor board. Any ideas please?

SOLVED
OK, sorry, 2 found errors in wiring. The key is the “Y Stop”, brown and red. These are the same colours as the Thermistor on the bed. Replaced the Y Stop to Microswitch, problem solved, until I tried to heat the bed. Checked the resistance of the red and brown that I disconnected from the Microswitch and it was 100k ohms - the penny dropped, I’d reversed the brown and red when I connected the plugs at the controller board end. Now all working well.

I hope this helps someone else with Y motor issues.

2

check wiring of endstop for Y axe

3

The end-stop is closed when not actuated (bed far from it) and open when you push the lever.

Try swapping the X and Y end-switches and see if your Y axis moves both ways (don’t hit the home button as there will be no end-stop for that axis).

The wiring can be faulty but also the plug (bent contact).