CR-10 Z+ & Z- both move downward

And while the Z axis is moving, I hit the limit switch and nothing happens.

Is this a double failure mode or just a single?

Hey Devout,
Welcome to the forums!

There are a few things that may be causing the issue, if you could try a couple of things for me we may be able to figure out what’s going on and hopefully get it fixed for you.

  • Try (with the printer off) to manually spin the z-axis rod and see if there’s any severe binding that may be present.
  • Try and decouple the z-axis rod and see with manual control if the motor can spin both ways freely.
  • Ensure that your z-axis rod is properly greased so that it is turning through the hotend gantry freely.

Hopefully, the outcome of those things will give us a better idea of what’s going on or if it is due to a faulty part.


Hi Devout,

Welcome to the forum :slight_smile:

I’ve not used a CR-10 before so I am assuming it only has a single limit switch on the z-axis.
Do you have a digital multimeter handy? It would be good to test the continuity of the limit switch where it connects to your printers main board and see what signal is getting back to the mainboard.