Snapmaker U1 - Revised Filament Path Extruder Cover
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An attempt at both constraining the filament path upon leaving the extruder gears, and lower friction with ptfe tube
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9-5-26 Update: v11 non PTFE model
-added 0.5mm to side facing hotend to close gap
-added significant material to attempt increased strength of filament path section
-assembly may now require inserting idler bearing first, and main drive gear/extruder arm before inserting into extruder housing
-verified it fits into extruder housing, but untested in actual printing
6-11-26 Update: v10 models
-Reduced overall model thickness by 0.5mm (attempt to reduce retention slider friction)
-Increased rounded relief (attempt to reduce retention slider friction)
-Added corner radius to bottom of guide path overhang (attempt to increase rigidity, report back if this causes docking interference)
******Design Flaw in existing design. if you've printed the existing parts in the past week or two, do not install. it is missing a clearance pocket for the tool retention pin****
Working on correcting it asap - 5-21-16
New models uploaded with clearance pocket for tool retention pin - 5-21-26 Part-2
revised version
***This is a WIP, I tested static fitment on an extra toolhead i have. But I dont print tpu, so i need folks to test it and report back. This is my best first round stab to help reduce the spaghetti, but need feedback for further revisions. Use at own risk***
Print it with 0.1mm layers, choose wall counts and infill at your discretion. I would recommend atleast petg of better for long term use.
For short test pla should be fine. but consider a more robust material if we determine this helps. (like cf-petg, abs, cf-abs, asa etc)
Fitment; this is tight, and fiddly to get together, use patience, but it does need cautious percussive persuasion to send her home the last little bit. this is by design as we are trying to keep the path tight.
You will need to manually apply tree supports to the underside on the overhang for the tapered section.
For the ptfe, you will need to cut a section approx 10.4-10.6mm in length.
Edit: added a non PTFE lined version if you are having trouble with the thin upper wall on the ptfe hole