Belt issues on Z axis

[julius rosen]

Any one can give me tips to get the belt aligned so it doesn't come off the bearings ?  Tension is good. 

I moved the stepper motor belt gear both in and out but it doesn't seem to help.. I also tighened the middle roller bearings up...

THANKS 

[Derek the Admin]

Hey. I'd be happy to help you.

Which was is it slipping off? It is most likely that your anchor points (where you zip tied the belt to the screws) is too far inbound. Also please confirm that you used 10mm long spacers on the Z idlers and the idler at the bottom of the X plate instead of 6.35mm spacers like are used for the V wheels.