1 Topic by RDSK (edited by RDSK 2017-07-07 08:56:11)

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Topic: snapped filament

Hi

I have started using some old xyx spools which are now nearly empty.  I have found that the filament often snaps half way thru a print and think its because as the spool empties the torque on the spool from the printer feeder has to increase to get the spool to rotate since the radius is much lower. 

Are there any recommended ways to prevent these snapped cables?  I read on another thread that old pla becomes brottle as it absorbs moisture if left for a long time.  Is there a way to reverse this process?  Perhaps putting it in a bucket of moisture absorbing powder?

Rupert

2 Reply by carl_m1968

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Re: snapped filament

You can bake the filament in a low temp like 140F for several hours but the cartridge body may not hold up to the heat nor your oven be able to operate that low.

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3 Reply by RDSK

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Re: snapped filament

Thanks.  A  new spool (ubder week old) just snapped - or at least stopped feeding filament half way thru a print.

That makes me think it may be some other fault.  The XYZ junior has printed fine for over a year and this problem has just started.

Could an issue with some mechanism cause a filament blockage or some such?  I have been cleaninf the nozzle several times already this week but print then start but dont complete.

4 Reply by mjf55 (edited by mjf55 2017-07-08 03:56:37)

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Re: snapped filament

RDSK wrote:

Could an issue with some mechanism cause a filament blockage or some such?  I have been cleaninf the nozzle several times already this week but print then start but dont complete.

Have you cleaned the filament feeder, as it will often get dirty from the filament.

5 Reply by Bozotclown1970

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Re: snapped filament

RDSK wrote:

Thanks.  A  new spool (ubder week old) just snapped - or at least stopped feeding filament half way thru a print.

That makes me think it may be some other fault.  The XYZ junior has printed fine for over a year and this problem has just started.

Could an issue with some mechanism cause a filament blockage or some such?  I have been cleaninf the nozzle several times already this week but print then start but dont complete.


If you have a JR I would suggest replacing your filament stepper motor with the following or something similar.

https://www.amazon.com/gp/product/B011QCFGPO

6 Reply by yizhou.he

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Re: snapped filament

XYZprinting recommend cut off some white tube that connects the feeder and extruder. The connecting part of the tube inner suface gets smoother after long time use and lead to increased resistance to the filament movement. I would try this first.

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