Dual parking carriage extruder Prusa i3 | E3D & 1730 FMH

This design is based on Jellebross' and 3D Proto's design. http://www.thingiverse.com/thing:1446731 http://3d-proto.de/

Summary

Dual parking carriage extruder. It uses one E3D Lite6 hotend and one 1730 Full metal hotend. The E3D Lite6 (V6 fits as well) for support and materials up to 240C and the 1730 hotend for materials up to 400C. On each carriage, there is a 40mm high-airflow server fan to keep the hotend cool. Aswell as a part cooling fan. It uses two 12V 20N electromagnets to pick up and drop off the carriages. Two neodymium magnets on either side of the Z-slides hold them in place. The two electromagnets are mounted to the mid-carriage, as well as an inductive sensor to level the buildplate.

Things you'll need:

- E3D v6 or E3D Lite6 hotend http://e3d-online.com/ - 1730 Full Metal Hotend http://www.1730hotend.com/1730-full-metal-hotend-standard-edition-basic-1-75-mm.html - 2x 40x40x20 mm 12V cooling fan https://nl.aliexpress.com/item/YOC-Hot-New-Black-Plastic-12V-DC-40mm-20mm-2-Wire-Computer-PC-CPU-Cooling-Case/32689866369.html - 2x 40x40x7 mm 12V cooling fan https://nl.aliexpress.com/item/New-4007-40MM-3CM-fan-40-40-7mm-5v-0-15A-12V-0-1A-The-graphics/32451807299.html - 2x Pneumatic fitting M6 https://nl.aliexpress.com/item/2-pcs-lot-PC4-M6-Pneumatic-Straight-Fitting-Connector-for-4mm-OD-tubing-M6-6mm-Reprap/32539393164.html - LJ12A3-4-Z/BX-5V inductieve proximity sensor https://nl.aliexpress.com/item/M12-4mm-detection-5VDC-NPN-NO-LJ12A3-4-Z-BX-5V-cylinder-inductive-proximity-sensor-switch/32553311139.html - 2x 20N 12V electromagnet https://nl.aliexpress.com/item/P20-15-2-5kg-Electric-Lifting-Magnet-Electromagnet-Solenoid-Lift-Holding-DC-6V-12V-24V/32656605538.html - 10x LM8UU bearing https://nl.aliexpress.com/item/Free-Shipping-12pcs-lot-LM8UU-8mm-Linear-Bushing-CNC-Linear-Bearings/32434013744.html - 2 or 4-channel relay board https://nl.aliexpress.com/item/1pcs-lot-4-channel-relay-module-4-channel-relay-control-board-with-optocoupler-Relay-Output-4/32340914033.html - 12x Neodymium magnet 6 x 3mm https://nl.aliexpress.com/item/100pcs-N35-Mini-Dia-6x3mm-Neodymium-Magnets-Strong-Round-Magnet-Industrial-Magnet/1923066185.html
- 2x metal disk Ø21mm x 2mm thick - 2x Diode 1000V / 1A - 16x ISO4762 M3 x 35 bolt - 6x ISO4762 M3 x 8 bolt - 4x ISO4762 M3 x 20 bolt - 4x ISO4762 M3 x 25 bolt - 2x ISO4762 M4 x 30 bolt - 2x ISO4762 M4 x 16 bolt - 2x M4 nut

Wiring

See 3D proto's wiring diagram here: http://www.3d-proto.de/public/img/DualParkExtSetup.png

Slicer settings:

Very few firmware changes are required. The pick up and drop off process is done in Gcode.

Simplify3D

{IF NEWTOOL=0} G1 X215.000 F5500 {IF NEWTOOL=0} M42 P11 S255 {IF NEWTOOL=0} G1 X0.000 F5500 {IF NEWTOOL=0} M42 P5 S0 {IF NEWTOOL=1} G1 X0.00 F5500 {IF NEWTOOL=1} M42 P5 S255 {IF NEWTOOL=1} G1 X215.000 F5500 {IF NEWTOOL=1} M42 P11 S0

Cura 15.04

See: https://github.com/Helixmedia3D/KT8Post-Postprocessor Use these settings for Cura Custom Gcode: https://github.com/Helixmedia3D/KT8DualPlus/blob/master/KT8%20Cura%20Gcode.md (Cura 2.X isn't supported!)
Updates: 16-11-17: Added a right E3D carrier, so dual E3D v6 or Lite6 is now possible.
Contact me if you have any questions.