<![CDATA[SoliForum - 3D Printing Community — dual extruders]]> 2013-01-16T14:34:14Z PunBB https://www.soliforum.com/topic/132/dual-extruders/ <![CDATA[Re: dual extruders]]> Rondavouz, that is truly amazing. You should be very proud. I am in awe. smile

]]> https://www.soliforum.com/user/351/ 2013-01-16T14:34:14Z https://www.soliforum.com/post/9582/#p9582 <![CDATA[Re: dual extruders]]> Jealous!

]]> https://www.soliforum.com/user/651/ 2013-01-16T14:26:43Z https://www.soliforum.com/post/9580/#p9580 <![CDATA[Re: dual extruders]]> Is it strange that I'm starting to drool from seeing this dual extruder setup on the doodle? Very nice indeed. Can't wait to see more on it.

]]> https://www.soliforum.com/user/155/ 2013-01-16T13:10:00Z https://www.soliforum.com/post/9570/#p9570 <![CDATA[Re: dual extruders]]> It was only a matter of time.  Very interesting,  congrats on the work,  looks pretty decent as well

]]> https://www.soliforum.com/user/70/ 2013-01-16T04:05:50Z https://www.soliforum.com/post/9552/#p9552 <![CDATA[Re: dual extruders]]> Now I'm excited.  Great stuff, can't wait to see more.

]]> https://www.soliforum.com/user/78/ 2013-01-15T18:23:46Z https://www.soliforum.com/post/9468/#p9468 <![CDATA[Re: dual extruders]]> cool smile

]]> https://www.soliforum.com/user/134/ 2013-01-15T18:09:33Z https://www.soliforum.com/post/9465/#p9465 <![CDATA[Re: dual extruders]]> Oh my. That's nice.

]]> https://www.soliforum.com/user/221/ 2013-01-15T17:40:50Z https://www.soliforum.com/post/9459/#p9459 <![CDATA[Re: dual extruders]]> Rondavouz,

Great stuff! Feel free to drop by the Bowden thread and add any lessons/tips/material choices that you have.

]]> https://www.soliforum.com/user/366/ 2013-01-15T17:06:17Z https://www.soliforum.com/post/9455/#p9455 <![CDATA[Re: dual extruders]]> Teaser Time!

http://forumbilder.se/images/235201355632Pc0d0.jpg

http://forumbilder.se/images/bf5201355758Pf53d.jpg

Working on leveling the second extruder atm. Will be back soon!

]]> https://www.soliforum.com/user/12/ 2013-01-15T16:59:13Z https://www.soliforum.com/post/9453/#p9453 <![CDATA[Re: dual extruders]]> I think that the trick to getting this to work well is that it must be as minimal as possible.

I am not opposed to upgrading the board, I am more concerned about the weight of the assembly. Other than going bowden it seems best to have only 1 motor.

I haven't really considered the code side yet, but that does seem tricky at least.

]]> https://www.soliforum.com/user/559/ 2013-01-14T18:36:02Z https://www.soliforum.com/post/9403/#p9403 <![CDATA[Re: dual extruders]]> Here is a starting place for looking at this- http://www.thingiverse.com/thing:16523

He is using two Makergear hotends with Bowden tubes, which is pretty much what the Solidoodle would do.  It also requires a RAMPS.  I think trying to force the Sanguinololu to support two extruders is a losing proposition.  There will be enough complications without adding that in as well, so it's best to start with electronics that already support the mod.  It might be tricky to do dual extruders on RAMPS and still keep a gcode controlled nozzle fan, so the Azteeg X3 would be best I think.

The Azteeg is just over $100 if you don't buy stepper drivers for $50 more.  You could keep the Pololu drivers from the Sanguinololu and buy one more for the extra extruder.

KISSlicer is probably the best one to use for dual extrusion.  It was developed by a BfB user, and those printers have had dual extruders for a long time.  It has separate retraction settings for the unused extruder, so you can pull the filament further back to prevent ooze, and there are also cool down and warmup controls.  There is also a wipe pillar- I haven't looked at it much but I believe it is a cylinder that gets built along with the part.  When the second extruder is ready to print, it runs over the pillar so that any ooze gets wiped off there rather than on the part.

]]> https://www.soliforum.com/user/14/ 2013-01-14T18:21:40Z https://www.soliforum.com/post/9402/#p9402 <![CDATA[Re: dual extruders]]> I think ooze shouldn't be too much of an issue with an idle extruder since it should be off when not extruding. I think ooze is more of a problem with the active extruder. Also, a way to make sure both extruders are level with each other and the bed can be tricky. Does the sang have a way to wire in an extra heater and thermistor for the 2nd hot end?  I know you would need another MOSFET or somehow to wire the extruder heaters out in parallel?  I might be lost on this thread, but is it still aiming at making the dual mod without upgrading the board?  If so, maybe I'll start a second thread for those willing to upgrade the board.

Another thing that isn't a deal breaker, but may be sort of complex to solve in firmware or gcode is how to know when you are extruding from one hot end or the other. I imagine it would have to be something like telling your gcode that both extruders come from the same source, e in the sang case. These are some of the reasons I would think two motors would work better.

]]> https://www.soliforum.com/user/13/ 2013-01-14T17:46:14Z https://www.soliforum.com/post/9398/#p9398 <![CDATA[Re: dual extruders]]> elmoret wrote:

Backwards direction is definitely used - that's retraction, how else would you change filament! (Plus, it's used during extrusion to relieve pressure when moving to another area)

Thank you for your knowledge.  I guess spliting e-motor won't work.

while searching for other pins to add fifth motor driver.. i ran across this.

reprap.org/wiki/SLUM

i hope his prototype works. since buying a new Azteeg x3 will be +200 and adding extruder and nm17 that would be over budget for me... unless I am to build a new printer all togather.. :-(

]]> https://www.soliforum.com/user/651/ 2013-01-14T17:41:04Z https://www.soliforum.com/post/9397/#p9397 <![CDATA[Re: dual extruders]]> Preventing ooze is retraction setting.

]]> https://www.soliforum.com/user/78/ 2013-01-14T16:56:45Z https://www.soliforum.com/post/9396/#p9396 <![CDATA[Re: dual extruders]]> Got a couple of vague mechanical ideas cooking that will hopefully solve both of those problems. I will post if I figure it out. I will need help on the electronics side though.

Another problem that I don't know how to approach is how to prevent ooze from the unused hot end.

]]> https://www.soliforum.com/user/559/ 2013-01-14T16:53:40Z https://www.soliforum.com/post/9395/#p9395