Summary

The Acetone Smoothie spins ABS-printed objects inside an Acetone-vapor vessel, resulting in a uniformly glossy surface without base scars. Acetone Smoothie can be made as simple or as sophisticated as you like. https://www.youtube.com/watch?v=qZ2M2RDUTAQ

SELL PRINTS OF MY DESIGNS! License available here:
https://cults3d.com/en/3d-model/various/commercial-license-for-all-my-models

The Smoothie is designed avoid pressure buildup by providing a vent in the 1st flange. Make sure you leave enough clearance between the spinning rod and the lid of your vessel. This means, that Acetone vapour will escape, which may be a hazard with DC BRUSHED MOTORS which produce sparks. STEPPER MOTORS do NOT produce sparks. USE IN WELL VENTILATED AREA

The simple version

If you want the simplest implementation and still get 90% of the benefit, this is for you.

• A $4 geared DC motor (http://bit.ly/2gGYym8) - READ NOTE ABOUT SPARKS ABOVE
• No bearings. You can modify the Smoothie_Flange1 and Smoothie_Flange2 STLs so that the axis hole is 5mm or print plastic bushings to fit in the flanges.

The advanced version

If you want to precisely control the rotation speed, pausing, changing of direction, timing etc., then this is for you. You could control the heating if you wanted to - not covered here - with a silicone heating pad, if you wanted to!

• $3 stepper motor such as 28YBJ-48 (http://bit.ly/2gY0zbK)
• $3 Arduino Nano (http://bit.ly/2g2g54g)
• $5 Ball Bearings (http://bit.ly/2h5SFMu) or Brass Bearings $4 (http://bit.ly/2gYxSxH)

You will also need

• 2x 15mm M3 Hex bolts and matching nuts
• A glass jar (size depends on your projects)
• A 5mm rod or tube (length depends on your projects)

Notes

I use hot glue to attach the Smoothie to jar's lid.

As heat source I use the printer's heated bed.

I found out that attaching the part to the rod with Hot Glue works the best. To make life easier, I sometimes incorporate tabs with a 5mm hole inside the object. Then just insert the rod inside the object and secure it with hot glue on the exposed end.

The Moai used in the rendering is from http://www.thingiverse.com/thing:149271