Parking dual extruder, Prusa i3 X axis mod, hexagon extruders

thingiverse

This is my design of a dual carriage system. I am using two electromagnets 12V 20N for picking up an extruder and for parking i disable the electromagnet so that the permanent magnet located in the X-axis (left and right side parts) holds the carriage in place. While parked the extruder does not ooze, because an aluminium plate closes the nozzle opening. STL and Solidworks part are included. Please see my youtube video for the carriages in action!https://www.youtube.com/watch?v=FiTmRHkiEUg Update: Electric scheme is based on this scheme (thanks to 3d-proto):http://www.3d-proto.de/public/img/DualParkExtSetup.png. Pay attention to the direction of diode D1 and D2 that are placed parallel to your electromagnets. Switching hotend fans with relays is optional of course. Print Settings Printer Brand: RepRap Printer: Prusa i3 Supports: Yes Notes: Print the carriages in ABS, because they are close to the hotend and the electromagnets get hot. Support structures are needed. Post-Printing 1x Ultra micro servohttp://www.hobbyking.com/hobbyking/store/__31634__HK_282A_Single_Screw_Ultra_Micro_Servo_2g_0_2kg_0_08sec_EU_Warehouse_.html 1x 5V two channel relayhttp://www.ebay.com/itm/5V-Two-2-Channel-Relay-Module-With-optocoupler-For-PIC-AVR-DSP-ARM-Arduino-/181026509345 2x Diode 1000V/1Ahttp://www.conrad.com/ce/en/product/162272/?insert=89&insertNoDeeplink&productname=Diotec-1N4007-diode-1000V1A-Case-type-DO-41-IF-1-A-Reverse-voltage-UR-1-kV 1x Micro switchhttp://www.conrad.com/ce/en/product/707243/?insert=89&insertNoDeeplink&productname=Microswitch-250-Vac-5-A-1-x-OnOn-Hartmann-MBB1-01-A-01-C-09-A-momentary-1-pcs 6x LM8UUOP-8mm-Open-Linear-Ball-Bearinghttp://www.ebay.nl/itm/10pcs-LM8UUOP-8mm-Open-Linear-Ball-Bearing-/300628744824?hash=item45fede9a78:m:m6WdBy6L7VAYf5z7aMKo36A 2x Neodymium magnethttp://www.conrad.com/ce/en/product/505783/?insert=89&insertNoDeeplink&productname=NdFeB-magnet-cylindrical-design-Conrad-x-H-5-mm-x-10-mm 2x 20mm x 15mm 12v 20N electromagnet (mind the temperature, mine got to 65 degrees celcius)http://www.conrad.com/ce/en/product/502290/Intertec-ITS-MS-2015-12VDC-electromagnet-12-Vdc-M3?ref=searchDetail 2x Fan grill 25mm x 25mm (optional)http://www.conrad.com/ce/en/product/189494/SEPA-912510000-FG25-W-x-H-25-mm-x-25-mm?ref=list 2x Fan 12v 25mm 10mm 5m³/hhttp://www.ebay.nl/itm/231085074387?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Custom Section Simplify 3D tool change script (you will need to finetune your parking spots): {IF NEWTOOL=0} G1 X232.000 F6500 ; go to right parking lot {IF NEWTOOL=0} M42 P57 S255 ; electro magnet 2 off {IF NEWTOOL=0} G1 X-2.000 F6500 ; go to left parking lot {IF NEWTOOL=0} M42 P58 S0 ; electro magnet 1 on {IF NEWTOOL=1} G1 X-2.00 F6500 ; go to left parking lot {IF NEWTOOL=1} M42 P58 S255 ; electro magnet 1 off {IF NEWTOOL=1} G1 X232.000 F6500 ; go to right parking lot {IF NEWTOOL=1} M42 P57 S0 ; electro magnet 2 on