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03-24-2015, 12:48 PM #1
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- Feb 2015
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Jammed Nozzle help - CTC: Makerbot Replicator 2X
Hi all,
I have a CTC Makerbot Replicator 2X that I have had for a couple of months, and it has just jammed for the first time. I took the nozzle off to soak it in acetone to clear the jam, but it has this plastic tube on it that I cannot get off. If I put it in acetone it will dissolve this tube too will it not? I am not sure if this tube is important, so any help would be greatly appreciated.
Here is a picture of the nozzle and tube:
Many thanks,
Sam.
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03-24-2015, 03:54 PM #2
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- Jan 2014
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I believe that's a PTFE liner, which won't dissolve in acetone. https://capolight.files.wordpress.co...g?w=832&h=1005
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03-24-2015, 04:10 PM #3
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- Feb 2015
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03-24-2015, 07:39 PM #4
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- Jan 2014
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PTFE is pretty slick, so it guides the filament down through the cold break into the melt chamber.
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03-24-2015, 07:45 PM #5
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- Feb 2015
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03-25-2015, 04:13 AM #6
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- Jun 2014
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My guess would be that the PTFE tube in question has distorted. It is not really supposed to come out of the stainless steel heat dispersing tube.
I would warm it with a hot air gun gently until the PTFE tube comes out then pick out the plastic that is stuck in there with heat as much as you can then clean with Acetone or MEK. << vicious stuff is MEK be careful.
It does seem that there is a lot of evidence that sort of says that once a nozzle has started blocking it will continue to block and it's best just to replace it. Certainly on mine that was the case. For the cost of these parts it is best to consider them as consumables, chuck that one in a box marked "spares that may work" and buy a new nozzle and stainless tube.
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03-25-2015, 05:36 AM #7
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- Feb 2015
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I think replacing the stainless steel tube is beyond my knowledge, is buying a new nozzle and PTFE tube a better idea? Where does the tube go does it just stick up inside the hole the nozzle threads into?
I tried to take the other nozzle off that jammed also, it kept moving so I tightened the screw that secures it, but over tightened it, stripped the thread now it seems like that nozzle is unusable now as it will keep moving
Thanks for all the help!
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03-25-2015, 05:46 AM #8
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- Jun 2014
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Are you trying to remove these nozzles while the extruder is off?
If so that explains why the PTFE tube came out. The plastic is solid when cold so you can do all sorts of damage trying to dismantle it without heat.
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03-25-2015, 05:53 AM #9
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- Feb 2015
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I did a preheat to 205C, but as soon as it reached it I unscrewed it, should I have left it a little longer?
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03-25-2015, 06:01 AM #10
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- Jun 2014
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- Burnley, UK
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No, that is fine.
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