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Blobs problem

Posted by Koby_88

Koby_88

Blobs problem
January 25, 2016 01:06AM

Registered: 11 years ago
Posts: 26

Hi to all i have problem with my prusa i3 bowden, the prints are nice but there are a lot of blobs on the surface. I try all retraction settings, head lift, wipe.... nothing helps. How can i solve this problem ?

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Attachments:
open | download - 20160125_055503.jpg (381.8 KB)
open | download - 20160125_055439.jpg (382.2 KB)

Plasteroid

Re: Blobs problem
January 25, 2016 06:03AM

Registered: 12 years ago
Posts: 125

Have you tried different filaments or just one brand (impurities)? Dust going to the hot end with the filament can cause blobs.

Prusa i3, Ramps 1.4. Catnozzle 0.4mm
SketchUp - Enveloping Globoid Worm Gear - Part One - 3D Printed: [youtu.be]
DesignSpark Mechanical & more precise screw thread: [youtu.be]
Nicer Screw Thread In SketchUp ( Bolts,Nuts): [youtu.be]
How To Model A Heart Shape In SketchUp: [youtu.be]
How To Draw 3D Printable Snap Fit Ball Joint In SketchUp: [youtu.be]

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Koby_88

Re: Blobs problem
January 25, 2016 06:15AM

Registered: 11 years ago
Posts: 26

I have tried different filament, the problem is still there so i don't think impurities are problem.

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Downunder35m

Re: Blobs problem
January 25, 2016 02:33PM

Registered: 11 years ago
Posts: 778

You just have retraction issues that's all.
Every time you start a new outside run it will leave these little blobs.
For simple designs like the one in your pic you actually don't need retraction at all winking smiley

Might be worth a try....

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Koby_88

Re: Blobs problem
January 26, 2016 01:28AM

Registered: 11 years ago
Posts: 26

You are right smiling smiley

But what can i do when i print something more complex ? To increase retraction distance or what ?

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Paul Wanamaker

Re: Blobs problem
January 26, 2016 03:24AM

Registered: 13 years ago
Posts: 580

Koby,

I've gone ahead and published the guide Retraction Tuning With Slic3r on the Tutorials --> Slic3r Tutorials Wiki page.

I'm quite familiar with ways of doing all this by inserting gcode, but not for all of this for all firmware. As always, if I've made an error, please let me know.

Hope that helps!

Edited 1 time(s). Last edit at 01/26/2016 04:06AM by Paul Wanamaker.

My printer: Raptosaur - Large Format Delta - [www.paulwanamaker.wordpress.com]
Can you answer questions about Calibration, Printing issues, Mechanics? Write it up and improve the Wiki!

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Koby_88

Re: Blobs problem
January 26, 2016 03:46AM

Registered: 11 years ago
Posts: 26

WOW Thanks a LOT Paul !!! I'm gonna try this as soon as i can smiling smiley

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Paul Wanamaker

Re: Blobs problem
January 26, 2016 04:32AM

Registered: 13 years ago
Posts: 580

Great!
Let me know here if you have any problems with the guide.

Thanks!

My printer: Raptosaur - Large Format Delta - [www.paulwanamaker.wordpress.com]
Can you answer questions about Calibration, Printing issues, Mechanics? Write it up and improve the Wiki!