Qidi Plus 4 poop chute sledge shim
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A shim to decrease the vertical slop in the poop chute sledge system, in hopes that it would decrease nozzle breakage.
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- Creative Commons — Attribution — Noncommercial
[Edit: Note that there seems to be a lot of variances unit to unit, so this shim will only work for some users.]
The Qidi Plus 4 nozzle cleaning system leaves quite a bit to desired, but I hope I can alleviate some of the issues with this small and simple mod. Together with my nozzle cleaning procedure (check my profile) I believe that I can decrease the number of nozzle breakages.
I already sanded my chute sledge frame down so I can't test this model myself. But if you do and it doesn't do it's job or if it's too tight, I will change the model accordingly as fast as I can.
The uploaded version is an improved one from the one in the photos. Check the Makes section for up to date photos.
It might be a good idea to lubricate the sledge shaft before installing this. A thin layer of candle wax should work well, as well as any grease suitable for plastics. Silicone might be a bad idea though.
PRINT SETTINGS:
I've uploaded three thicknesses, 0.3mm, 0.35mm and 0.4mm. I suggest starting with the 0.35mm one. The target is to have the thin part out of 2 layers. Use:
- 0.15mm layer heights for 0.3mm shim,
- 0.175mm layer heights for 0.35mm shim, and
- 0.2mm layer heights for 0.4mm shim.
- Rectilinear top and bottom layers, and make sure the infill lines are printed perpendicular to one another.
- At least 2 walls.
- Not sure if it matters, but I'd enable “Precise Z height” if available. Orca has the setting in Process → Quality → Precision settings.
TO INSTALL:
(If you want to try without lubing first, skip steps 2-4.)
- Remove the back plate of your Plus 4.
- Scratch off some candle with the top of your nail, then warm it up and massage between your fingers until it turns into a see through grease.
- Rub the grease on the sledge shaft.
- Reinstall the chute sledge mechanism.
- Push the printed shim into place as in the photos.
- Check that the sledge returns with the force of the spring if you push it back by hand.
If the sledge doesn't return on it's own, remove the shim and message me! If it does, check whether the vertical movement of the sledge is better in control when it's at it's resting state.