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Thing-O-Matic Cooling Nozzle

by Jamie, published

Thing-O-Matic Cooling Nozzle by Jamie Mar 15, 2012
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Summary

This is a simple cooling nozzle that uses compressed air to quickly chill a print.

Instructions

I was having some problems printing up a cube gear as well as some beveled gears and some folks suggested the cooling would help minimize curling on the fine details so I put together a simple setup that uses my shop compressed air.

The tube is 1/8" Stainless Steel and is connected to a regulator and a needle valve by flexible tubing.

The mount snuggles in between the bottom of the Z-Carriage and the metal plate that holds the Mk7 extruder and is held in place by a 4-40 screw.

First print the mount, and tap the #4-40 hole.
Bend and trim the tubing
Slide the tube into the hole in the mount - it's almost a press fit

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Why not use an aquarium pump? Silent.

Based on what I have read and tried myself over th elast year, active cooling is only recommended for PLA (in fact it's pretty much necessary to get anything to print properly with a ToM it seems). If you are printing ABS, cooling is generally the exact opposite of what you want. It will tend to give you poor interlayer adhesion leading to brittle parts that split before they're even printed. A better solution for ABS to reduce or limit curling on the corners of your object is the calibrate your Z height and level your build platform VERY well and perhaps add mouse-ears to your prints. You may also benefit from reducing the number of facets for your corners (if they are rounded) or enabling some of the plugins for acceleration etc.

Please let us know if that helps with the curling problem you are seeing. I to have had a lot of problems with that on my ToM. I have visited the makerbot help page and tried a number of their suggestions with varying success. I am ready to try anything at this point. //Dylan

Hi Dylan -

It made a huge difference - I looked at using some of the fan duct designs as well, but since I have an air compressor decided to go this route. It doesn't take much flow, so having a small/fine needle valve is important too.

Cheers

Jamie

Have you tried http://www.thingiverse.com/thing:15430www.thingiverse.com/thing:1543... ? Going slow and quickly cooling the ABS to a warm (NOT cool) temperature will help with curling on corners and other fine details.

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I hadn't seen or tried that yet, but I will test it out now. Thanks!

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