LYMAN FILAMENT EXTRUDER V3
by hlyman, published
The BOM shows a cost figure of near $900. The extruder alone can be made for under $250.
See the video on YouTube:
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See the latest version 4.1 where the water cooling is omitted and only cooled with a fan. Control your one motor with a switch and pot direct from the DC supply. Controller not needed for one motor unless your using a stepper motor.
Probable cause of locking up is that your temp may be to high and overheating the core nipple back near the flange causing pellets to preheat and bind the spool. I extrude at a temp now of 185C. Take the assembly apart and clean out the nipple. You will have to do this carefully while it is hot. I had this same problem when I tried an aluminum nipple.
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