(Switched) Filament guide for Prusa MK4 #build123d

A simple frame mounted filament guide for the MK4 with the mounting system for best stability and pull-off effect
1h 0m
1× print file
0.20 mm
0.40 mm
9.00 g
6
68
4
374
updated January 9, 2025

Description

PDF

Warning

IMPORTANT:

Using the switched fillament guide with very high models crashes the extruder!

Please be aware of that! 

I am planning to update the model as soon as possible to remove this issue.

 

Motivation

After my original and reprinted filament guide broke I was searching for a better filament guide which could endure more force in the case of a filament knot. https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4-hardware-firmware-and-software-help/filament-guide-broken-twice

I found and made the great model here with a short arm that is directly mounted on the frame similar to the filament holder (see https://www.printables.com/model/517659-filament-guide-for-prusa-mk4/comments/1584025).

After installation I found that a modification of the holder orientation would give even more stability, though reality proofed my wrong the knot in the filament will apply a force that pulls my switched version of the frame. 

IMPORTANT:

The guide will NOT be damaged though. 

 

Creation 

So I used my Code-CAD tool ([build123d]https://build123d.readthedocs.io) to cut the model in half and turn the foot 180 degrees.

There is another model that does a similar thing but only rotating it 90 degrees.
I hope this gives everybody a quick and easy choice of the best use-case.
 

You can use the model file 789198a-filament-guide-MK4.py to experiment with the angle

Printing

  • I used the Prusa PLA Galaxy Black to match my other printer parts.
  • I added autogenerated lightning supports (see screenshot in make)
  • Printing took around an hour. 
  • Installation is easy - you can reuse the PFTE insets from the original filament guide or a tube with reverse bowden

 

Random Douglas Adam Quote

The Vogon demolition ships hang in the sky exactly like bricks  don't.

 

Tags



Model origin

The author remixed this model.

Differences of the remix compared to the original

Foot is turned 180 degrees to have the best result if force is applied to the upper arm.

 

I thought this would be to more stable version, though reality proofed my wrong.

A filament knot will pull ov my switched version. Though the guide will NOT be damaged!

License


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