Cannot Home towers

[Ligerzero_942]

Hi I'm having an issue with my Rostock Max v2

When I try to Home Towers the right and rear towers home correctly, however the left tower will travel to the top, press up on the sensor bar, lower, but then begin vibrating rapidly for a few seconds before stopping. I have also noticed that while pushing the carriages down the cheapskates manually, the two correctly functioning carriages will travel down the cheapskates smoothly, whereas the left carriage will periodically stop every few inches.

I have tried turning the printer off and then on but the problem persists.

My Rostock has the wooden carriages and is equipped with the Kysan type stepper motors.

[thedoble]

Check the cheapskate bearings and see if they aren't gripping the pylons too firmly.
Check your belt tension and inspect the belt for indications of wear.
Check in the base near the steppers to see if there's a pile of black dust that could indicate the belt is being chewed up.

[geneb]

That sounds to me like "classic" crosstalk on the end stop wires. Are there any other wires running down the tower that the end stop wires occupy?

g.