Y-axis belt slipping (Page 1 of 4)

Have you tried removing the screw yet? it may just need some cleaning and lube... there could be a burr inside of the gear where the setscrew threads are and this may have galled up the idler screw because the idler screw itself should not be turning.

EDIT: Grob beat me to it

Kinda reminds me of the local hardware stores around here, you aren't in the door five minutes and already at least 5 people have offered to help you find something

Hello. Did you ever solved your problem? After a bunch of upgrades on my printer my Y-axis is slipping

Well that's not good.  Adjust the VREF for that axis.  I would bet if you grabbed it with your hand while it's moving you can make it skip fairly easily.   Turn it up just a hair.

I would highly doubt speed had anything to do with it.  150% of slow is still slow

Clockwise.
Don't break it

This seems an appropriate place to post this little story:

About a week ago I upgraded to ball bearing carriages and M5 z rod, and after the big reassembly (every moving part was removed from the frame at one point...) I had a weak y-axis, which I finally fixed by realising that I hadn't tightened up the set screws on my direct-drive coupler. I'd spent a whole afternoon chasing VREF, alignment, cleaning of rails, belt tension... Felt like such a fool!

After a bit of a break, flash forward to last night - I had the m3x50mm problem with lawsy's carriage, so the extruder was held on mainly with tape. Last night I was trying to print a variation to replace it, but somehow couldn't get rid of slips in the x axis. Now this never happened before, so I thought maybe the ball bearings were still wearing in a bit and a bit sticky, was feeling like I might have bitten off a bit much all at once.

Starting to worry a bit, given I'm trying to print a case for a clock as a present by wednesday, and I've already been in trouble for late delivery, so every hour counts...

This in mind, I tuned VREF to get a good sound and a bit more force (figuring the bearings may have changed the sweet spot), and being overzealous / in a hurry nearly cooked the x motor - but it was still slipping (particularly badly when the driver tripped out on thermal).

I then added a desk fan and a heatsink to the x driver, as a matter of desperation. Still slipping.

Let everything cool off (more time wasted), retuned VREF back down to run cool as possible, looked good for a bit then... Still slipping.

Sliced the model at 30 mm/s (SimCity Turtle Mode - so useless) to reduce the forces (good for the wobbly extruder though). Still Slipping.

While leaving the x motor to cool back down another couple of tries later I thought I might jam a multimeter thermocouple in there to see how it was doing (too hot to touch still).

At this point I noticed the x pulley was riding right against the flange, so decided to lift it up a little. When I put the allen key in the set screw to loosen it, I notice it's already loose. DUUUUUUUHHHHHHH!!!!

I think I need a label on the front of the case: "CHECK YOUR SET SCREWS."
Also: "IT'S LATE, YOU'RE TIRED, GO TO BED."

I think adjusting the Y-Axis VREF seemed to help, well thus far. At first it made it way, way off. Seems now I am just getting the slightest y-wobble on my prints. Is there an easy way to Y-Axis VREF besides keeping printing objects as you tweek the VREF?

No fan on the board, never seemed to need it before. I have lubed the Y-axis rods with the recommonded white lithium grease a few times recently and made sure there was no gunk messing with it.

The wobble in the X-axis started after I turned the speed up for my testing of nylon. I suppose there is an off possbility that the VREF was accidently bumped maybe and adjusted it slighty at the time.

I think I'm almost there. I am just getting a slight Y-wobble at times rather then great shifting. I just can't figure if I need to turn it up or down yet.

Well I haven't lubed them. I can try that.

Argg that y-axis shift is back after a week and a half....curses! Maybe I need to switch to the replacement Y carriages I have seen around.