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gummy hotend

Posted by f3rDz

f3rDz

gummy hotend
March 23, 2014 10:32PM

Registered: 13 years ago
Posts: 88

hi all,

i just assembled a new reprap. parts coming from my previous build except for a new hotend.

whenever i print, first few layers comes out a-ok. after a that, filament isnt as continous as it was. there are breaks in the prints.

google for the trouble and came across this [www.reddit.com]

my question is: what is the solution to a gummed hot end?

thanks in advance.

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f3rDz

Re: gummy hotend
March 23, 2014 10:34PM

Registered: 13 years ago
Posts: 88

here's what i was getting.

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Attachments:
open | download - Photo0053.jpg (43.7 KB)
open | download - Photo0057.jpg (44.6 KB)
open | download - Photo0058.jpg (49 KB)

Ralf

Re: gummy hotend
March 24, 2014 05:26AM

Registered: 13 years ago
Posts: 198

Are you printing PLA or ABS?

What hotend do you use? Do you have cooling at the upper part of the hotend?

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f3rDz

Re: gummy hotend
March 24, 2014 10:17AM

Registered: 13 years ago
Posts: 88

hi ralf,

i tried both abs and pla on a jhead. same result. and yes i have a fan blowing on the jhead.

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chewbaccah

Re: gummy hotend
March 25, 2014 03:43PM

Registered: 12 years ago
Posts: 25

Can you give us more information? Temperatures, print speed, etc.

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f3rDz

Re: gummy hotend
March 25, 2014 10:46PM

Registered: 13 years ago
Posts: 88

i tried printing high speed and low speed. 100mm/sec and 50 mm/sec

pla - tried 175c to 210c
abs - 230c-240c

tried slicing with kiss and slic3r.

i'll try changing the hotend later.

thanks

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chewbaccah

Re: gummy hotend
March 26, 2014 05:58PM

Registered: 12 years ago
Posts: 25

I haven't had much success with slic3r. Its probably my fault, but I started with Cura, and it does great. I would recommend it to anyone.

I would try slower still. I print between 5 and 40mm/sec.