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AthenaII Extruder Drive and Spool Holder Assembly
Materials and Tools
An extruder consists of two ends - a hot end and a cold end. This portion of assembly covers construction of the cold end, or extruder drive, the part of the system that pushes the filament into the hot end. The extruder drive is a pinch-wheel design wherein filament is pinched between a preloaded idler bearing and a toothed drive gear. Filament is pushed hard against the drive gear by the preloaded idler so that the teeth in the drive gear engage the filament, forming something akin a rack-and-pinion drive. The stepper motor then pushes the filament into a Bowden cable, where the filament is constrained and can only exit through the nozzle in the hot end.
- Ream the 3mm holes in the drive body and linking rod with a 3mm drill bit.
- Clean all the parts with the precision knife.
- Start the M3 x 25mm screw in the bottom-left hole. Do not tighten.
- Place the linking rod over the remaining mounting holes on the right side such that the screw head recesses face up(the far end is in mid-air). Start a pair of M3 x 30mm screws into the mounting holes. Do not tighten.
- Tighten all of the screws except for the floating end of the linking rod - that screw should be tightened just until flush with the linking rod.
- Place washers on the two M3 x 45mm screws. Push one of the screws through the hole in the fuel line.
|AthenaII Printed Parts Glossary|
|Assembling hot end|
|Soldering and tinning|
|Track 1||Track 2||Track 3|
|Connecting Rods||Frame||Epoxying Magnets|
|Epoxying Magnets||Connecting Rods||End Effector|
|Extruder Drive and Spool Holder||Epoxying Magnets||Frame|
|End Effector||Extruder Drive and Spool Holder||Connecting Rods|
|Frame||End Effector||Extruder Drive and Spool Holder|
|Final Mechanical Assembly|
|Wiring/Melzi + BB|
|Firmware and Calibration|