1 Topic by bradjshannon (edited by bradjshannon 2016-06-15 05:05:45)

  • bradjshannon
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Topic: New carriage designs in progress. Feedback appreciated! [pics]

https://www.thingiverse.com/thing:1626895

http://soliforum.com/i/?MjdJabn.jpg
http://soliforum.com/i/?xUFZFpE.jpg
http://soliforum.com/i/?jTavops.jpg

This is a completely original set of carriages for the Solidoodle 2. They were inspired by Lawsy's carriages, and additional work by CHAMP and others.

I decided to make these because other solutions weren't nicely compatible with string-drive systems (fishing line instead of timing belts). Also, I had issues with the Y-Left carriage's stepper-holder warping due to heat. And I don't like the X carriage solutions available for bowden extruders. Too many pieces.

Should be fully compatible with both belt-driven and string-driven setups, and original SD2 idlers, pulleys, gears, stepper placements, etc.

X carriage
The X carriage combines a mount for a J-head or E3D or Prometheus or similar hotend. It is intended for use with a bowden setup, as there is no mounting point for a direct drive stepper on the carriage.

It uses 3x LM8-UU linear bearings. Hold them in place with tightened cable ties.

Y-Left carriage
The Y-Left carriage holds the NEMA-14 stepper in the same position as Lawsy's carriages and the original Solidoodle design (IIRC). My design differs from Lawsy's in that there's more clearance for the belt/string-tightening bolts, allowing for the use of these "line-length control washers."

This part is designed to "capture" M3 hex nuts for (I think?) all the points where M3 bolts are necessary. Not the NEMA-14 mounting points, but everywhere else.

It uses 2x LM8-UU linear bearings. Hold them in place with tightened cable ties.

Y-Right carriage
The Y-Right carriage does not exist yet. SOON.

See Also:
For a strong, reliable bowden connection from the extruder to the hotend, I recommend my own variation of Lawsy's bowden extruder, which completely captures a push-fit connector at the cold end. You can pump up the e-stepper's torque and stop worrying about your bowden line bursting free.

I recommend these "line-length control washers" for relatively easy tightening of fishing line.

To Do:
make Y Right carriage
update X carriage to "capture" M3 nuts
figure out a nice way to mount fans/accessories on the X carriage
??

Send me feedback! Updates ongoing.

2 Reply by pirvan

  • pirvan
  • pirvan
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Re: New carriage designs in progress. Feedback appreciated! [pics]

Nice design, I like the simplicity of it.

To print or, 3D print, that is the question...
SD3 printer w/too many mods,  Printrbot Simple Maker Ed.,  FormLabs Form 1+
AnyCubic Photon, Shining 3D EinScan-S & Atlas 3D scanners...
...and too much time on my hands.

3 Reply by wardjr

  • wardjr
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Re: New carriage designs in progress. Feedback appreciated! [pics]

I also like the simplicity of the design.  I've been running a very similar set up for my Bowden for the last couple of years.  And as most here know I am a huge fan of fish line over belts.
Nice work!!!

Maybe you have seen this before on my write up of the Cyclops.  I set them up so they could be fed from top or bottom.

http://i.imgur.com/nbYRjuh.jpg

http://i.imgur.com/B0bNfRV.jpg

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Thanks to all for your contributions

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