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Printing issues with sides of print looks stringy or melting

Posted by strk 
Printing issues with sides of print looks stringy or melting
January 11, 2015 06:17PM
When i was printing a small hollow cube for calibrating my prusa i3 printer I noticed that that side walls of the cube were not evenly straight or not looking uniformly. instead they look like there is too much filament or it's stringing up on the sides of the cube. However, the bottom portion of the cube came out perfectly so I'm not sure that it could be a bed leveling issue. For more details you can see the pics below that I've attached. some other info printer: makerfarm prusa i3, J head, 3mm filament, using slic3r 1.0.0 RC3.


so my question is what could be causing this?


Thanks strk
Attachments:
open | download - CAM00238.jpg (150.1 KB)
open | download - CAM00239.jpg (163.7 KB)
open | download - CAM00241.jpg (132.9 KB)
open | download - CAM00242.jpg (149.6 KB)
Re: Printing issues with sides of print looks stringy or melting
January 11, 2015 09:10PM
You skipped a lot of pertinent info like temperature(s), material, speed....

But it looks like ABS and I am going to guess that your heated bed is too hot for starters (no hotter than 90c but 85c is better) also you probably don't have retraction turned on (set to 2mm to start) and have you calibrated your extruder? I.E. extruding 100mm uses exactly 100mm? Have you measured your filament using calipers then put that measurement into the slicer? This should be done with every new roll. Don't just put in 3mm as that is almost never the actual measurement and this can make a big difference in the amount output.
Re: Printing issues with sides of print looks stringy or melting
January 11, 2015 10:04PM
FYI I run my bed at 100c for ABS without issues on a Makerfarm i3...
Re: Printing issues with sides of print looks stringy or melting
January 12, 2015 12:10AM
Quote
tmorris9
You skipped a lot of pertinent info like temperature(s), material, speed....

But it looks like ABS and I am going to guess that your heated bed is too hot for starters (no hotter than 90c but 85c is better) also you probably don't have retraction turned on (set to 2mm to start) and have you calibrated your extruder? I.E. extruding 100mm uses exactly 100mm? Have you measured your filament using calipers then put that measurement into the slicer? This should be done with every new roll. Don't just put in 3mm as that is almost never the actual measurement and this can make a big difference in the amount output.

That may be the problem since I have my bed set around 105 - 110c. And when you talk about retraction do you mean the "Lift z" option in slic3r?

Thanks
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