(Greg's Accessible) Wade's Extruder Bowden Adapter

by summetj, published

(Greg's Accessible) Wade's Extruder Bowden Adapter by summetj Apr 14, 2013
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This is a small adapter plate that allows you to attach a bowden tube to a (Greg's Accessible) Wade's extruder. I hacked it together based off of Mark's very nice bowden adapter and mount. (I just didn't need the M8 rod mount part... I use it with my own mounting block found here:http://www.thingiverse.com/thing:73763 )

I have included STL files for using an M4 nut, or a commercial Push To Connect tube adapter. The SCAD file can make either.


Nut version:
Print the part. Drill out the M4 holes to the proper size (11/64 drill works). I also recommend drilling a 3-4mm deep 4-5mm hole (I used drills from a 1/8th up to an 11/64th one at a time to make sure I didn't go to deep) into your extruder body so that the 4mm OD tube can be threaded past the end of the nut and top of the adapter plate (and fit into the hole).

Screw an M4 nut onto your (4mm OD) Bowden Tube. Slip the tube into the slot, push the nut into the cutout. Stick a piece of filament through your Wade's extrder, slip it into the bowden tube, then using the filament as an aligning tool, bolt the adapter to the bottom of your Wade's Extruder. (Note, I also have a base mounting plate that holds the stepper at the correct angle to use this part on a Rostock-mini printer, see http://www.thingiverse.com/thing:73763 )

PTC Version:
Note: unless your Push To Connect adapter is a good one (i.e. that will actually release the tube without breaking) you may as well just use an M4 not screwed onto the tube. This part is simpler, but you'll have to drill out and tap the hole in the center to match your PTC adapter.

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My bowden had a lot of lag in the filament. It left the models covered with strings. So what is the inside diameter of your tube? Is is hardware store flexable hose or something different?

I found a tube that is part of an aleron assembly at a airplane hobby store is about 2mm ID 36" long and for about $5.79 you get 2. Paradise hobbies inc. part# DUB500.

My tube has a 2mm ID (4mm OD) and I'm using it with 1.75mm filament. I got it from McMaster-Carr " Super-Smooth Clear Mfa Tubing, 2 mm ID, 4 mm OD, 1 mm Wall Thickness" It still has more lag than a direct drive extruder and leaves some strings here and there you have to rub off, bu I've found that by setting my retract distance to 2mm it has been working reasonably well.

Ok. This makes since. Good Idea on the retraction.