Spacer for holding the UM2+ Upgrade kit drive gear in place

3D printer parts and enhancements

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Print this in case your drive gear moves towards the stepper.

Materials and methods

I have printed it with colorfabbs XT with a 0.15mm layer height. The spacer has a tight fitting so print it not too fast.



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Mini leLee added this to the Well, slap my thigh... collection ago
269c77b576d6f30b92552d48c7bba569?default=blank&size=40gr commented ago

I have the opposite problem - my stepper gear moves away from the stepper motor. I open the cover - push it back on - and then the printer works for just another 30 minutes or so.

Will this spacer work on the other side as well? I guess I need to take it apart again and check :(

Mini logo neotkoNeotko / Sugarpop! commented ago

Yeah I suppose but I don't think the grease should reach since it's just a bit around the gear that contacts. Anyway if works, it works.

Mini carsten m ller 111Carsten Müller commented ago

Jep, that would have done it too, BUT what would prevent the grease from reaching the axle again after a couple of 5+ hour prints?

Mini logo neotkoNeotko / Sugarpop! commented ago

Could you try to use wd40 on the tip of the nylon part (without hitting on the motor) and left it to dry? The green Grease could be re-applied in a minute but this time just on the gear not all around. Maybe on the assembly they overdid it a bit.

Mini carsten m ller 111Carsten Müller commented ago

It is for the UM2+ upgrade kit feeder, the geared one. The nylon gears of the feeder are totally intact and showed not visible signs of stress or damage also the fitting of the drive gear is perfect. No wiggling, only slipping.

I think this whole issue was caused by some grease from the feeders gear train that has managed to reach the steppers axle. Before the issue i had a couple of 5+ hour prints with ABS.

Mini logo neotkoNeotko / Sugarpop! commented ago

Sorry just wondering this it's for the um2 or um2+ feeder? Just wondering because if the nylon gear slips it might be a issue on your nylon gear part?

Mini logo neotkoNeotko / Sugarpop! commented ago

Ahh I see, indeed if didn't 'wiggle' and just slide it should work. Cool men!

Mini carsten m ller 111Carsten Müller commented ago

Hi Neotko, you are right in case the unintended movement were around the stepper axle. But you wouldn't lose any steps if the movement is only along the axle. The drive gear had slipped along the axle towards the stepper cause grease from the feeder made its onto the axle. In this case the rotary motion is perfectly transmitted to the gear but the gear could slip along the axle. In my case it moved always towards the stepper - reproducibly so a simple spacer fixed the problem.

Mini logo neotkoNeotko / Sugarpop! commented ago

If it moves, you really new a new screw men! It if moves it really means that you can loose steps and it actually slips!

Mini carsten m ller 111Carsten Müller published this design ago