1 Topic by Rocketman

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Topic: Orange Ozz. Thermistor?

I recently hot a new hot-end and finally got it working correctly, but today I am noticing an orange oz coming down the side of the nozzle. Kind of like a sap. Not sure if my thermister melted? lol. I wouldn't have looked that close had it not been for a squeaking noise everytime the drawing arm hits one side of each fill line, and the fill lines became more and more irregular as my last print went on. uneven spaced, not rounded, sometimes skips. Something weird is going on, and as far as I can tell there is nothing restricting the motion of the drawing arm in any direction.

2 Reply by 2n2r5 (edited by 2n2r5 2013-06-30 19:49:08)

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Re: Orange Ozz. Thermistor?

take a picture... oozing generally isn't a good thing although, i'm having trouble trying to figure out what would be causing orange oozing unless you have orange filament.

For future reference, post these posts really should be in the help/repair/maintenance section.

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

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3 Reply by Rocketman

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Re: Orange Ozz. Thermistor?

Nope, still using a white filament. Maybe the Kapton tape could actually be melting? I don't have a picture of the ozz, but the irregular webbing I just photographed. I got a perfect print just last night too so this is really bothersome. I thought I was finally getting things back to normal with this printer. The first is the irregular, and the second is what I've taken to believe is normal.

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4 Reply by cckens

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Re: Orange Ozz. Thermistor?

OK, hopefully they move this thread...

Rocketman, what you are seeing is filament oozing out of the top of the barrel, and unfortunately it's not uncommon.  This is a precursor to a clog.  The orange/brown is filament that is being pushed out the top of the nozzle where is screws into the barrel and then being burnt by the temp of the nozzle.  This can also occur at the PEEK end of the barrel and that's a bit harder to clean, but still do-able.

I know... this is happening to my hot end that I just got from SD.  The only cure is to remove the hot-end, remove the nozzle, clean the nozzle out in an an acetone bath (or by torch, but the bath is better) then re-assembly with the nozzle a little tighter on the barrel.  This will keep the filament in the nozzle where it belongs. 

Don't over tighten the nozzle.  It should be finger tight then with a quarter turn tighter.  Too much and you risk damage to the barrel.

I know this is not what you want to hear, but it's common maintenance and once you learn how to make sure the nozzle is tight on the barrel (or on the PEEK), you don't thing about it.  It's something that I should have checked on receipt of the hot-end, but I was impatient.

5 Reply by Rocketman (edited by Rocketman 2013-06-30 20:38:28)

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Re: Orange Ozz. Thermistor?

cckens wrote:

OK, hopefully they move this thread...

Rocketman, what you are seeing is filament oozing out of the top of the barrel, and unfortunately it's not uncommon.  This is a precursor to a clog.  The orange/brown is filament that is being pushed out the top of the nozzle where is screws into the barrel and then being burnt by the temp of the nozzle.  This can also occur at the PEEK end of the barrel and that's a bit harder to clean, but still do-able.

I know... this is happening to my hot end that I just got from SD.  The only cure is to remove the hot-end, remove the nozzle, clean the nozzle out in an an acetone bath (or by torch, but the bath is better) then re-assembly with the nozzle a little tighter on the barrel.  This will keep the filament in the nozzle where it belongs. 

Don't over tighten the nozzle.  It should be finger tight then with a quarter turn tighter.  Too much and you risk damage to the barrel.

I know this is not what you want to hear, but it's common maintenance and once you learn how to make sure the nozzle is tight on the barrel (or on the PEEK), you don't thing about it.  It's something that I should have checked on receipt of the hot-end, but I was impatient.

It took me a few months to find someone who could remove my old hot-end and install this new one. All I know about clogs is using acetone and guitar string. I don't want to take any small pieces apart unless it is really necessary. Would you suggest I get a different hot-end next time? I am told my old one burned out because the thermister wasn't assembled correctly and neither was the thermistor on the brand new hot-end as well so the guy who fixed my printer had to fix their thermistor as well.

6 Reply by Rocketman

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Re: Orange Ozz. Thermistor?

What is this particular "Solidoodle Discussion" section designed for. It seems like repairs are the main topic covered in the forums. lol.

7 Reply by lawsy

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Re: Orange Ozz. Thermistor?

Learn to show appreciation for the kind people here who help you despite your tone and disregard for forum protocol.

Learn to search. This has been covered several times, if you search 'oozing':

http://www.soliforum.com/misc.php?action=pun_attachment&item=2190&download=0

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