AndersE
Posts: 224
Joined: Sun Feb 02, 2014 4:40 pm

Blobbing with 3.0.2

I just installed 3.0.2 for my K8200.

I have got a strange blobbing problem with it.
When starting a new loop/layer it retracts way more than is set (around 1.0-2.0mm) . It retracts several centimeters
and then it extrudes way to much when starting the layer/loop. So i get really large blobs everywhere, and the head bangs into
those blobs and ruins the print.

If i use 3.0.1 with the same profile it works as normal.
I have checked if it was the "relative extrusion" setting, but they are the same when running both versions.
All other settings are also the same.

What could be the problem?
It starts with the first infill layer in this file.
302.factory
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301.factory
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jimc
Posts: 1124
Joined: Wed Aug 28, 2013 11:02 pm
Location: mullica, nj
Contact: Website

Re: Blobbing with 3.0.2

its funny you posted this. i have been using s3d for 3 years now and have never seen this issue until today and if i didn't see it with my own eyes i would say you were imagining things. i have a part i am printing in ninjaflex so my retraction speed is set very slow and at the beginning of the layer it retracts about 1cm then returns. i noticed it because it took so long to happen with my speed set low. i must have sliced and tried this print 5 times with different settings and it does it every time. i am slicing on my pc. now i went over to my mac and sliced it on that and its fine. printing right now and it hasnt done it at all.
AndersE
Posts: 224
Joined: Sun Feb 02, 2014 4:40 pm

Re: Blobbing with 3.0.2

Have you tried the factory file i posted?

I forgot to say that retraction speed is low in these files, i am running higher speeds without problem normally (40-50mm/s).
It's just that when this started i thought something had happend with the speed, so i lowered to 15mm/s.

The thing is, the retractionspeed in 3.0.2 is way more then my bulldog xl extruder can take, it goes so fast that the stepper skips a bunch of steps
when it retracts , probably because of that i get those blobs.

This is really annoying, i can't use 3.0.2 at all because of this. In these files posted it seems to just happen at the infill.
But other models it happens everywhere almost.

I haven't looked at the gcode yet, mostly because i don't know where it is saved.

And i haven't changed anything on this pc, it's the same as it always have been. It is dedicated to printing and modelfixing only.
No changed hardware or cables.

I will try some more models and film the action also.
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jimc
Posts: 1124
Joined: Wed Aug 28, 2013 11:02 pm
Location: mullica, nj
Contact: Website

Re: Blobbing with 3.0.2

Did you read this thread

viewtopic.php?f=9&t=3536
AndersE
Posts: 224
Joined: Sun Feb 02, 2014 4:40 pm

Re: Blobbing with 3.0.2

Ahh no i didn't.
Thanks, so it is a new bug and not just me ;)

Hope this is fixed really quick..

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