Rigidbot Side Spool Rig w/Filament Runout Switch

Holds filament spools on the side of the Rigidbot and guides the filament into a pneumatic fitting and Teflon guide tube with a filament runout switch.

3D printer parts and enhancements

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After rearranging my Rigidbots on my wire rack, I needed a side spool rig to lower the vertical profile.

The side spool holder fits on the left top rear corner of a Rigidbot (either original or RB2 or Big), and the guide fits on the left top crossbar. A push fit pneumatic connector screws into the guide arm, 5mm thread. A 2mm ID/4mm OD teflon guide tube guides the filament to the RB hot end (I drilled a hole in the spring arm and threaded another fitting into that hole).

A 6" piece of 3/4" PVC goes into the end of the spool holder. In my case, I had to sand down the PVC a bit and it is a friction fit, but it could be glued in as well if desired. The tension nut goes on the end and holds the spool in place.

Works like a charm and the feed is so smooth that I haven't yet had any coils fall off the spool and jam. I'm using this on both my RB2 and RB Big. This rig allows you to stack same size Rigidbots as well (with a spacer).

I used M3-12mm screws to assemble, but any length longer than 10mm will do. The holes are sized so you can screw them in directly but if you want to use longer screws with nuts, you'll need to drill them out and use M3-30mm screws.

I used 4mm pneumatic fittings with 5mm threads (specifically http://www.amazon.com/uxcell®-Thread-Pneumatic-Connector-Fittings/dp/B009ITFXDI)

The limit switch arm uses the Sparkfun microswitch: (https://www.sparkfun.com/products/13119https://www.sparkfun.com/products/13119) The limit switch and code has not been tested yet but the guide arm can be used without it. If your printer board and software support it, you can wire the switch in and have the printer pause when the end of the filament is detected. That is DIY, however.

Materials and methods

[Updated 5/7/16] There are 4 printed parts in all, Side Spool A and B (or Side Spool All), Side Guide Switch Bolton, and the tension nut. Print in ABS or PLA, 25-35% infill, 5 @ M3 x 10-15mm machine screws, 6" section of 3/4" Sch 40 PVC pipe, and a tie wrap. You may need to ream out the guide hole with a 5/64" or 3/32" drill bit to clean it up after printing.

The limit switch arm needs to be rotated in Y by 270 degrees to lay flat on the bed (see CAD rendering).



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Mini screen shot 2013 09 30 at 16.40.44a.mediumClint commented ago

@FilaMentor, done and thank you for the suggestion. Clint

96ef82efcf78f5f8e90b744d09115dbb?default=blank&size=40FilaMentor commented ago

Hey, very clever design, however, I'd try renaming your guide to something like, "Guide with Filament RunOut Detector", etc.

Cheers, FilaMentor

7a2e976bc55c3d0ef8a22642d1bc52e4?default=blank&size=40Droone added this to the Accessoires Imprimante 3D collection ago
Bf11e375b9c096adeb6ff37e66091c04?default=blank&size=40rsfresco added this to the 3D Printer Accessories collection ago
Mini screen shot 2013 09 30 at 16.40.44a.mediumClint published this design ago