Acetone vapor is highly flammable, use this project at your own risk, the driver motor I used is not brushless, therefor it can generate sparks and ignite the Acetone vapor, to avoid this I designed a cap over the motor so it is not in the open, but still use with caution!!!
When you try to smooth a tall ABS print, top part of the print won’t be equally smoothed as lower part of the print, to solve this issue I made this smoothing chamber with a motorized shaft.
You have to add 4mm hole in your designs, but be sure to make it larger since the holes get smaller while printing, I use 4.3mm holes.
Parts are easy to get, the jar is from IKEA and other parts you can get from Aliexpress or check on Amazon, part list is at the bottom.
Total costs are below €20, you get 10 pieces 4mm rods for €8.60 in this price but you only need one. Filament used for all parts is around 225 gram, this includes the jar base which is 100 gram.
The lid is made with Polypropylene and it won’t be affected by Acetone, but gluing the PLA print is really hard on the lid, sand the lid slightly with fine sandpaper and use 2 component glue, if that won’t work for you, I also uploaded a version with holes so you can attach it with M4 bolts and nuts.
The prints can be attached together, everything fits tightly, the lid print and driver housing are twist fitted, but once it is attached it is hard to get it off again, if you want to be able remove again, use little bit silicone spray in the slots. Glue the part first on the lid and when it is dry you can drill the hole in lid.
There are 2 684 bearings in the print, press fit it with a M4 nut and bolt, don’t hammer it in, that will damage the bearing!
Drill a 2mm hole in the lid as shown in the picture to keep the pressure low in the chamber, Acetone expands when it’s in vapor shape.
I also ordered couplers to attach the 4mm shaft to 5mm motor shaft, but those did not arrive on time, so I designed a coupler for it, I still recommend using a brass coupler (link below)
Model used: https://www.thingiverse.com/thing:2718906
Video in action:
IKEA 3.3L Jar with lid: 192.777.67
IKEA 3.3L Jar only: 203.932.47
IKEA Lid: 703.617.86
S30K 12VDC 14rpm motor: https://www.aliexpress.com/item/DC-12V-14RPM-2-Wires-High-Torque-Electric-Geared-Box-S30K-Reduction-Motor/32819069437.html
684ZZ Bearings: https://www.aliexpress.com/item/10-PCS-set-Miniature-684ZZ-4-9-4-mm-693ZZ-3-8-4-mm-Ball-Bearings/32877954557.html
4mm Stainless Steel rod 200mm long: https://www.aliexpress.com/item/Stainless-Steel-Rods-shaft-Linear-Rail-Round-Shaft-Length-200mm-Diameter-3mm-2mm-2-5mm-4mm/32963540832.html
5.5x2.1mm Power Supply Jack: https://www.aliexpress.com/item/5Pcs-3A-12V-For-DC-Power-Supply-Jack-Socket-Female-Panel-Mount-Electrical-Socket-Connector-5/32804739048.html
M4 M3 bolts nuts
Brass 4mm to 5mm Coupler: https://www.aliexpress.com/item/New-Brass-Flexible-Motor-Shaft-Coupling-Coupler-Motor-Transmission-Connector-Drive-Shaft-2mm-5-Connector-Boat/32870242574.html
Low wattage heating pad 220V: https://www.aliexpress.com/item/1-PC-Heat-Mat-Reptile-Brooder-Incubator-Pet-Heating-Pad-Brew-EU-Plug-7W-14W-20W/32909592021.html
Low wattage heating pad 110V: https://www.aliexpress.com/item/Pet-Heat-Mat-20W-Warmer-Amphibians-Dog-Cat-Bed-Reptile-Brooder-Incubator-Heating-Pad-100-120V/32849290638.html
If the motor spins to hard for your liking get a PWM speed controller: