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Bowden clamp for Rostock

by Johann, published

Bowden clamp for Rostock by Johann Aug 2, 2012

Description

Rostock is a delta robot 3D printer.

This part can hold a MakerGear PEEK insulator (GrooveMount) and a bowden tube with 4 mm outside diameter. The M8 nut allows adjusting the clamp pressure so that the bowden tube won't pop out.

Newer versions of the OpenSCAD source files will be published here: http://github.com/jcrocholl/rostock

Recent Comments

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Does the M8 nut pop out with time as there is no thread to hold it?
Same here. I have a adjusted model I can upload but I ended up redrilling my holes because I wanted the hotend to be centered.

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License

GNU - GPL
Bowden clamp for Rostock by Johann is licensed under the GNU - GPL license.

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Instructions

Print with ABS to make it more heat resistant. The original Rostock prototype uses PLA and it works okay too. Just make sure you don't pre-heat your hotend for too long without a fan pointing at it.

The top is very thin so you may need to print slowly to allow each layer to cool enough before you print the next layer. If this is a problem, use bowden_hotend_cooldown.stl to add extra cooling time for each layer.

  • Drill the clamp hole open to 4 mm.
  • Cut the three slots open with a sharp knife if necessary.
  • Add a stainless steel M8 nut on top but don't tighten it yet.
  • Push the PFA bowden tube all the way into the clamp.
  • Tighten the M8 nut, but not too tight. Hand tight should be enough.
  • Drill the inside of the PFA tube open to 2 mm if necessary.
  • Attach with two M4 nuts and Wade style plywood GrooveMount.

I recommend flexible clear metric PFA (Teflon) tubing with 2 mm inside and 4 mm outside diameter, e.g. http://www.mcmaster.com/#catalog/118/137

Does the M8 nut pop out with time as there is no thread to hold it?
I ordered a wade style plywood groovemount from makergear and got a rectangular shaped piece with offset mount. It's obviously not the right piece. Looking at their website it looks like I should have ordered a Brut/mk4 mount. Anyone have any thoughts?
Here is a modified version:

thingiverse.com/thing:27963
Rostock Bowden clamp offset
Same here. I have a adjusted model I can upload but I ended up redrilling my holes because I wanted the hotend to be centered.
thingiverse.com/thing:26355 is an awesome, printable mount that tightens down.
J Head Mounting Plate
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