X gantry has a "sine"-like resistance variance when moving along Y
I don't know how else to describe it, but when I move the X gantry along the Y axis, the resistance follows a sort of sine wave.
This only started to occur after I followed the X alignment guide: https://ratrig.dozuki.com/Guide/10.+X-Axis+Gantry+Alignment/210
Prior, it was a linear (and negligible) change in resistance along the Y axis.
Is it something I should be concerned about?
Rat Rig
10. X-Axis Gantry Alignment
8 Replies
Has me worried I've bent a bearing or a stepper motor pole. Can't imagine anything else that would cause that.
It does appear one of my CoreXY steppers has maybe a half millimeter of runout. Is this a major problem?
I don't know how that even happened
Though that runout doesn't seem correlated with the varying resistance
Is it the stepper or the pulley attached to the stepper?
I was gonna diagnose that today, ran out of time last night
I'm having a hard time being able to tell for sure, but looks like it may be the gear attached to the stepper not the stepper itself
I swapped with one of the Z motors and found it running out at the same spot. So I guess it must be the pulley. Hrmm.
I've tried installing the pulley with multiple tactics (including pushing against the apogee of the runout when installing) but nothing's fixing it. I'm ordering replacement pulleys and hoping that does the trick.
check the belts
For what? Being aligned vertically with the bearings? They seem to be.
Though as of now the variance in resistance is low. But still kinda wavy in variance.
if you havent moved a belts for some time, or if they were cold, the places where the idlers are causing some weird behaviour for some time
So it's normal & goes away with some "warm up"?
normaly yes