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Author Topic: Theory: Duo improved prints when using single extruder  (Read 395 times)

jonyo3d

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Theory: Duo improved prints when using single extruder
« on: February 05, 2014, 02:52:01 AM »
So I have this theory, and wondering if anyone else has thought of this or knows if it is actually a "thing" already or not..  I remember reading a post somewhere (probably here) mentioning that someone has not yet gotten "good prints" on a dual extruder setup, they just hadn't figured out the best settings yet and all that.  That spawned this idea, when you are printing with just one of the 2 extruders, using ABS, what if the second extruder is actually acting against you, micro-cooling the plastic as it repeatedly passes over it?  At the very least having that room temprature piece of metal passing .1mm above the plastic just layed down can't be doing it any favors.  Wouldn't it even act as almost a heatsink, helping to cool down things it passes over a little faster, leading to less than perfect prints due to the plastic not all cooling at same rate?

I wonder if it would get better prints by heating that second extruder for prints it is not being used on...  That's my theory.  Heat up that second extruder when not in use, doesn't have to be plastic melting hot, maybe just 100 or 150 or something, just hot enough so it doesn't contribute to the plastic cooling down as it passes over it.  Something like this would be very hard to proove either way, unless the results were so drastically different that you could conclude nothing else other than it must have been helping.

Anyone have thoughts on this?  Think I might be on to something here?  Or not?
« Last Edit: February 05, 2014, 01:15:20 PM by jonyo3d »

Herb

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Re: Theory: Duo improved prints when using single extruder
« Reply #1 on: March 16, 2014, 08:06:12 PM »
Perhaps you are referring to my post regarding Printing Quality with Dual Extruders (http://forum.bukobot.com/index.php?topic=2971.0). However, I am no longer having problems after reading this article on Using your Duo (http://bukobot.com/_media/software:usingyourduo2013.pdf). The article advised dropping the extruder temperature by 10 - 15 degrees. I am printing ABS at 215 with dual extruders, and it is now working quite well.

I do not have any problems printing with a single extruder.
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jonyo3d

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Re: Theory: Duo improved prints when using single extruder
« Reply #2 on: April 02, 2014, 01:17:14 PM »
Perhaps you are referring to my post regarding Printing Quality with Dual Extruders (http://forum.bukobot.com/index.php?topic=2971.0). However, I am no longer having problems after reading this article on Using your Duo (http://bukobot.com/_media/software:usingyourduo2013.pdf). The article advised dropping the extruder temperature by 10 - 15 degrees. I am printing ABS at 215 with dual extruders, and it is now working quite well.

I do not have any problems printing with a single extruder.

Ah, thanks for the info!  And yes it was probably your article, I know I read something where someone had trouble getting good quality print out of dual printers, and I was not seeing the best prints, so thought it may be related.  Thanks for the follow up!

 

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