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Thread: Itty Bitty Double Extruder
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11-30-2014, 12:22 PM #11
Thanks.
I haven't had any trouble with the 25mm hexagon cooling fan so far. The shroud is designed to concentrate the airflow around the heat sink fins. I've run a couple of 8-hour prints with no issues--one with $10 Sunon maglev 3CFM fan (which I highly recommend) and one with the 25mm fan shipped with the Hexagon. The cooling fins get warm, but I can easily hold a finger on them. Printing with both hot ends at 250C over a 110C bed, the heat sinks get up to around 45C, with no jams.
For the springs, I recommend 1Kgf per spring as a starting point. I found some springs in a Harbor Freight spring assortment that I cut in half and bent new hooks. These grip the MakerFarm ABS very well with the MakerFarm bolts. I.e. they can transfer more torque than the motors can deliver. I haven't sourced anything specific yet.
My 3D Norn Emissary print
09-13-2024, 02:28 AM in 3D Printing Gallery