Need help with Prusa i3 J-Head 0.35, 1.75mm, Hotend Print Quality
Posted by Alexander1984
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Need help with Prusa i3 J-Head 0.35, 1.75mm, Hotend Print Quality August 03, 2014 08:43AM |
Hello,
for several weeks I now own a Prusa i3.
Everything went smooth, from building, frist print and clibration.
So the Problem i have got is:
1. On the outer perimeter, where the hotend goes around and once it almost meets again same spot, to close the round/layer, it produces a little "blop" or upward string of filament:
Quality otherwise is good:
but this looks just not right
Like a flaw on some knitted sweaters, with some of the strings hanging out ;-)
Also overhangs tend to curl up!
to a point where the nozzle hits the bent-up PLA and starts melting several layers...
I have read althrough the really big thread about this issue here.
One guy even did some Video Slow-motion analyzes of what happens.
I tried :
- low/high temperature
- slow/fast speeds
- 1 or 3 fans running.
- little or much retraction.
I use 1.75mm PLA, a heated bed, heated to 62 degrees, printing directly on 5mm smooth high quality glass.
Prints stick superb and I have absolutely no problem with warping, not even slightly.
Just those 2 problems,
1. bending edges on prints -> worse on overhung parts.
and
2. those little "holes" in the print, cause by some blops/or also uplfiting fialment, maybe caused from too fast movement after outer perimeter is done?!
any help is really much appreciated!
I print 0.248mm layer height currently, but also happens at 02.mm
I use 186° and 3 fans (2 blowing at the piece form both sides , one at the hotend)
Alex
for several weeks I now own a Prusa i3.
Everything went smooth, from building, frist print and clibration.
So the Problem i have got is:
1. On the outer perimeter, where the hotend goes around and once it almost meets again same spot, to close the round/layer, it produces a little "blop" or upward string of filament:
Quality otherwise is good:
but this looks just not right
Like a flaw on some knitted sweaters, with some of the strings hanging out ;-)
Also overhangs tend to curl up!
to a point where the nozzle hits the bent-up PLA and starts melting several layers...
I have read althrough the really big thread about this issue here.
One guy even did some Video Slow-motion analyzes of what happens.
I tried :
- low/high temperature
- slow/fast speeds
- 1 or 3 fans running.
- little or much retraction.
I use 1.75mm PLA, a heated bed, heated to 62 degrees, printing directly on 5mm smooth high quality glass.
Prints stick superb and I have absolutely no problem with warping, not even slightly.
Just those 2 problems,
1. bending edges on prints -> worse on overhung parts.
and
2. those little "holes" in the print, cause by some blops/or also uplfiting fialment, maybe caused from too fast movement after outer perimeter is done?!
any help is really much appreciated!
I print 0.248mm layer height currently, but also happens at 02.mm
I use 186° and 3 fans (2 blowing at the piece form both sides , one at the hotend)
Alex
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Re: Need help with Prusa i3 J-Head 0.35, 1.75mm, Hotend Print Quality August 08, 2014 07:34AM |
I'm sad to hear that you hot end is death Personaly I lost a lot of thermistor that's why I have about 10 at home always ready to use.
One of my friend have a E3D-V6 but he have some trouble with it but when it print, It's a very nice print. I hope you'll enjoy it
Personaly I lost a lot of thermistor that's why I have about 10 at home always ready to use. One of my friend have a E3D-V6 but he have some trouble with it but when it print, It's a very nice print. I hope you'll enjoy it
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