PROBLEM: when HOMING, Z moves only UP

Before printing Z carriage was at the top, I did not pay attention and start printing. After warming, the Z carriage began to rise up to the top and was not able to move more. In that moment I turn off the power to stop printer self-destroying.

After rebooting printer I run auto-homing, X&Y works perfect, but Z moves only up.
All endstops working correctly (checked with M119 command).

I tried to disable ABL in firmware, but Z HOMING still not working ;(

PS: I have makerfarm i3 + marlin + enchanced ABL.

Z axis cable is probably backwards. Just flip it to the opposite where it plugs into the ramps board.
Well that is if I am understanding your problem correctly.

Quote:

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Originally Posted by Cameron

Z axis cable is probably backwards. Just flip it to the opposite where it plugs into the ramps board.
Well that is if I am understanding your problem correctly.

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I'm not sure.
The fact that the printer worked fine last few months without any changes to the settings, firmware and mechanics.
Until yesterday, when it was trying to self-destruct raising Z up when Z position already at MAX.

check to make sure your Z-endstop wires aren't broken, it's a safety feature to prevent bed crashes when no endstops are detected

you can check your enstops status with a M119 command , that happened to me when i installed the ABL and it was a loose cable.