Athena Effector Assembly
Materials and Tools
- The end effector is the part that moves the extruder hot end around the build volume. The printed end effector is PLA, which if not cooled will soften under the heat produced by the hot end. A 40mm box fan cools the end effector, the heat sink on the hot end and also the part being printed. The fan must run when the hot end is heated!
- The hot end must fit tightly in the end effector and getting it to seat can be difficult. Once seated, the hot end is kept from moving by the PTFE tubing which is pushed through the quick connect fitting and into the hot end.
- The extruder is a Bowden cable design in which the filament is constrained in a low friction PTFE (teflon) tube. Filament is pushed on one side by the extruder drive and only permitted to exit out the orifice in the hot end. The Bowden sheath (the teflon tube) has a 2mm inside diameter that permits the 1.75mm filament to slide through easily. Teflon doesn't melt; chips left inside the tube will block the hot end nozzle and ruin your day.
- Secure the fan, thermistor and heating resistor wires to the Bowden sheath with a small wire tie immediately above the Bowden sheath opening.
|Tandem assembly Athena Navigation|
|Green indicate workshop tasks|
|Athena Printed Parts Glossary|
|Assembling hot end|
|Soldering and tinning|
|Drilling Pilot Holes (Optional)|
|Person 1||Person 2|
|Connecting Rods||Epoxying Magnets|
|Motor End Assembly||Idler End Assembly|
|Extruder Drive and Spool Holder||End Effector|
|Firmware and Calibration|