Kinda web threads when PLA printing

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Boris
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Kinda web threads when PLA printing

Post by Boris » Thu Feb 26, 2015 12:39 am

So. There is no such problem when I print ABS. Never.
But when PLA printing always those nasty "web threads". I know it "travel trails" or how it calls ? When hotend just runing over model and do not printing. But what I doing wrong ? Feed rate, speed ?
Maybe poor felament quality ?

Thanks for any ideas.
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Felix 3.0 x2 extruders

frankjoke
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Post by frankjoke » Thu Feb 26, 2015 8:36 pm

Do you de-string/retract or wipe on moves? If not this could be the outcome.
Heat too high or flow too high as well.

p.s.: Why do you need the brim below the parts for PLA? Or is this part of the model?

Boris
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Post by Boris » Thu Feb 26, 2015 9:43 pm

Retracted for sure:
Enabled Retraction: checked
Retr Speed: 100
Retr Distance 4.5
Minimum Extrusion before Retr: 2.5
Max E B R: 0.02
Z Hop: 0.2
Cut off Object Bottom: 0
Nozzle Diameter: 0

190 degrees(it minimum temp on my felament(Esun China))

The raft is my mistake.
Felix 3.0 x2 extruders

frankjoke
Posts: 150
Joined: Sat Dec 28, 2013 6:07 pm

Post by frankjoke » Thu Feb 26, 2015 10:53 pm

Strange,
I have pretty similar values except Retr Speed (only 40) and distance (only 2).

The Nozzle diameter should not be 0 (in Felix 0.35) but I believe this was rather a mistake in your post.

Boris
Posts: 45
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Post by Boris » Fri Feb 27, 2015 12:50 pm

0 - means something like "as your printer settings"
Printer settings is 0.35
Felix 3.0 x2 extruders

frankjoke
Posts: 150
Joined: Sat Dec 28, 2013 6:07 pm

Post by frankjoke » Fri Feb 27, 2015 10:28 pm

Ok, still don't know which slicer you use.
You could post also g-code file (zipped) and ask to check it.

You can check it also with http://gcode.ws/ to see what it does really.

Filament can create some problems but most of it you can resolve with right slicing settings.

Boris
Posts: 45
Joined: Thu Jan 15, 2015 11:59 pm
Location: Moscow
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Post by Boris » Sat Feb 28, 2015 10:55 am

oh... it's CuraEngine.
I'll check your link for sure.

As it seems now it's not PLA problem but ABS too.
I can't remember did I see this web threads before.

There is Gcode

And this is photo of ABS plastic with those god damned thread leaks :(((


P.S. I've checked out that GCode analyzer. How it can be useful for my tasks ?
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frankjoke
Posts: 150
Joined: Sat Dec 28, 2013 6:07 pm

Post by frankjoke » Sat Feb 28, 2015 9:13 pm

I see only one thing which could be wrong: Too fast retraction.
The other speeds are normal or slow.
To my knowledge the printer can do 40mm/s or so and you use 100. I only remind that in manual I found 'fast retraction' is 1000mm/min which is 16.7mm/s! I used never >40 on rectract and >15 on prime.

By the way, if you like Cura you may want to use beta: http://software.ultimaker.com/Cura_closed_beta/ :D

Boris
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Location: Moscow
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Post by Boris » Sun Mar 01, 2015 12:52 pm

oh :)
I'll try change 100 to 40 for sure. Thanx for idea.

Thanx for the link.
I've got stand alone Cura 15.02.1 but don't found any advantage before Repitier. Also, this "on the fly slicing"(not in background as promised) is really bad idea for huge models.
Felix 3.0 x2 extruders

frankjoke
Posts: 150
Joined: Sat Dec 28, 2013 6:07 pm

Post by frankjoke » Sun Mar 01, 2015 11:21 pm

Boris,

the advantage is that you can see and place/scale/rotate/... parts much better than in repetier. I do not use Repetier at all anymore because I attached to my printer a Raspberry Pi with OctoPrint (including Wifi and power supply from old mobile phone <45$/40€.

I slice with Kisslicer or Cura (or http://www.craftunique.com/craftware) and send the gcode file to the printer via the web interface of http://octoprint.org/.

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