Dual extruder with anti-ooze system I wanted a dual extruder since a long time, I could just put two extruders side by side but I would have issues with oozing and the two tips would need to be exactly at the same height. So I made this : mod_embed_images_loadimage('e0531ac28eb13e355f6f6d5bb8a2d39c', '/forum/thumbcache/da5/d6f/989/5c9/680/9e5/9c8/74f/683/7c2/a2_800x400.png', 'http://forums.reprap.org/file.php?70,file=13701,filename=dual_extruder.jpg', 'https://reprap.org/forum/addon.php?70,module=embed_images,check_scaling=1,url=http%3A%2F%2Fforums.reprap.org%2Ffile.php%3F70%2Cfile%3D13701%2Cfilename%3Ddual_extruder.jpg', '', 196591, 800, 400, 'Loading image ...', false); The unused tip is lifted by a few millimeters by a rocking mechanism activated by a RC servo, at the same time the tip is closed : [youtu.be] Test print from the video with a Black ABS / white PLA, the two plastics doesn't stick very well together, so the support is easily removable : [attachment 13702 test_dual.jpg] Stl files and sketchup assembly are available on the Heavy Mendel wiki page : [reprap.org] https://reprap.org/forum/read.php?70,196591,196591#msg-196591 Wed, 16 Sep 2026 15:33:25 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?70,196591,781164#msg-781164 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,781164#msg-781164 datesheet Plastic Extruder Working Group Tue, 01 Aug 2017 03:01:18 -0400 https://reprap.org/forum/read.php?70,196591,220842#msg-220842 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,220842#msg-220842 The current is limited to 400mA during ~0.5s and fall to 200mA after to maintain the position.
The schematic and layout are available here : [reprap.org]]]> Petrus Plastic Extruder Working Group Sun, 23 Jun 2013 12:03:15 -0400 https://reprap.org/forum/read.php?70,196591,213264#msg-213264 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,213264#msg-213264 reprap.org]
My printer works with linux CNC so I use an output on the parallel port.

I added a wiper for the ABS nozzle at the beginning of the X axis : [attachment 15412 wiper.jpg]

And just printed that with it : [attachment 15414 Trixie_640.JPG]
Time-lapse : [youtu.be]

There is still some brown ABS on the print but it's much better than before.]]> Petrus Plastic Extruder Working Group Wed, 29 May 2013 09:35:47 -0400 https://reprap.org/forum/read.php?70,196591,212670#msg-212670 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,212670#msg-212670
Thanks in advance and keep up the good work! :D

lukas]]> isphording90 Plastic Extruder Working Group Mon, 27 May 2013 18:38:21 -0400 https://reprap.org/forum/read.php?70,196591,211591#msg-211591 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,211591#msg-211591
I like your nozzle wiping solution, that's pretty clever.]]> crispy1 Plastic Extruder Working Group Fri, 24 May 2013 00:37:02 -0400 https://reprap.org/forum/read.php?70,196591,211081#msg-211081 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,211081#msg-211081 MPower Plastic Extruder Working Group Wed, 22 May 2013 13:37:01 -0400 https://reprap.org/forum/read.php?70,196591,211072#msg-211072 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,211072#msg-211072 I am working on a wipe system to solve this issue.]]> Petrus Plastic Extruder Working Group Wed, 22 May 2013 13:07:33 -0400 https://reprap.org/forum/read.php?70,196591,208284#msg-208284 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,208284#msg-208284 MPower Plastic Extruder Working Group Mon, 13 May 2013 12:51:05 -0400 https://reprap.org/forum/read.php?70,196591,196869#msg-196869 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,196869#msg-196869 Fl0yd Plastic Extruder Working Group Tue, 02 Apr 2013 10:23:40 -0400 https://reprap.org/forum/read.php?70,196591,196769#msg-196769 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,196769#msg-196769
You could actually get away with one stepper in the middle and just have the gears engage when the mechanism moves side to side.]]> Sublime Plastic Extruder Working Group Tue, 02 Apr 2013 03:43:06 -0400 https://reprap.org/forum/read.php?70,196591,196599#msg-196599 Re: Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,196599#msg-196599
Have you experimented with trying to do it with one stepper motor, using the servo as a way to choose which extruder's gears are engaged?

Fl0yd]]> Fl0yd Plastic Extruder Working Group Mon, 01 Apr 2013 11:29:14 -0400 https://reprap.org/forum/read.php?70,196591,196591#msg-196591 Dual extruder with anti-ooze system https://reprap.org/forum/read.php?70,196591,196591#msg-196591

The unused tip is lifted by a few millimeters by a rocking mechanism activated by a RC servo, at the same time the tip is closed :
[youtu.be]

Test print from the video with a Black ABS / white PLA, the two plastics doesn't stick very well together, so the support is easily removable : [attachment 13702 test_dual.jpg]

Stl files and sketchup assembly are available on the Heavy Mendel wiki page : [reprap.org]
]]> Petrus Plastic Extruder Working Group Mon, 01 Apr 2013 10:24:26 -0400