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Air cooling system for hot-end

by fma, published

Air cooling system for hot-end by fma Dec 13, 2012
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9162Views 1031Downloads Found in 3D Printer Accessories
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Summary

This is a new kind of cooling system for hot-ends, based on a little air pump.

The ring is designed for a ORD Bot Hadron, but can be adapted for other 3D printers.

Instructions

Print:

  • 1x ring
  • 3x tube clips
  • 1x tube split

You need:

  • 3x M2.5x12 screws + nuts
  • 1x air pump (one of these little things for aquarium)
  • 3x50mm brass tube (ext. D 4mm)
  • flexible tube (ext. D 6mm, int. D 4mm)
  • 3x 5mm leds (opt.)

I didn't make tests, as I'm waiting for my new hot-end (sold the previous one with my first 3D printer, a nice Prusa, replaced by a ORD Bot Hadron), but I tried by maintaining the tube from the air pump by hand, and it seems to work fine.

My pump says it can reach 100l/min when the tube is 45cm below the surface of the water. Don't know yet if it is enough for printing at high speed. I plan to design a custom centrifugal pump, like this cute one: http://www.thingiverse.com/thing:4839. Another way to go is to use a little compressor, but this will need a pressure regulator!

The ring has 3 holes for leds.

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how well is it working and which kind of pump do you use? is a electric membrane pump for fish tanks sufficient?

fma - in reply to wthlee

As I changed all my carriage, I never really used that system (it broke quickly, because of too small parts).
But I'm working on the next release, for my new hardware. Hope to post something in a few days.
The pump is a membrane pump, and is really enough; I even have to pinch the tube to limit the flow! Having the air flow very close to the nozzle output requires very little air.

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