Strings between printed objects

EL34

Strings between printed objects
March 13, 2016 09:55AM

Registered: 11 years ago
Posts: 67

This is a new problem that I did not have last time I printed multiple objects
(see the pic)

See the pla strings between the 5 objects
It's like the extractor is still extracting as it moves to each object

I don't know if it's the new 1.75mm PLA I just installed
I measured it at 1.75mm and set Slic3r for 1.75mm

Or the new Slic3r I just installed (1.2.9.a)

Can anyone tell me how to fix this?
Is it something in Slic3r settings?

Img_9867.jpg

Edited 2 time(s). Last edit at 03/13/2016 09:57AM by EL34.

My projects are listed here - [www.el34world.com]

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the_digital_dentist

Re: Strings between printed objects
March 13, 2016 10:12AM

Registered: 11 years ago
Posts: 5,780

Turn on retraction?

Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

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EL34

Re: Strings between printed objects
March 13, 2016 10:41AM

Registered: 11 years ago
Posts: 67

Quote
the_digital_dentist
Turn on retraction?

I'm looking in Slic3r and don't see anything that says retraction and is unchecked

Where is this setting in Slic3r
What tab and text?

My projects are listed here - [www.el34world.com]

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stephenrc

Re: Strings between printed objects
March 13, 2016 12:32PM

Registered: 12 years ago
Posts: 548

Printer Settings tab and select Extruder 1, for a single extruder printer.

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EL34

Re: Strings between printed objects
March 13, 2016 12:57PM

Registered: 11 years ago
Posts: 67

Hmm, check out my screen shot
This is how the extruder is currently set

slic3r.gif

My projects are listed here - [www.el34world.com]

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IMBoring25

Re: Strings between printed objects
March 13, 2016 06:32PM

Registered: 9 years ago
Posts: 351

Most hot ends not made by E3D like more than 2 mm of retraction.

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EL34

Re: Strings between printed objects
March 14, 2016 08:15AM

Registered: 11 years ago
Posts: 67

I will try increasing the 2mm retraction length and see what happens

What about the minimum travel setting?
Hard for me to wrap my mind around that setting

My projects are listed here - [www.el34world.com]

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dmould

Re: Strings between printed objects
March 14, 2016 09:28AM

Registered: 10 years ago
Posts: 2,472

Try 4mm retraction. Reducing the hotend temperature will also reduce stringing (but may also decrease layer bonding).

Dave

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EL34

Re: Strings between printed objects
March 14, 2016 09:33AM

Registered: 11 years ago
Posts: 67

Thanks Dave

My projects are listed here - [www.el34world.com]

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dc42

Re: Strings between printed objects
March 14, 2016 01:29PM

Registered: 10 years ago
Posts: 14,672

In my experience with PLA, too little retraction causes blobs not strings, and lower extrusion temperatures reduce stringing. The retraction speed and acceleration may have an effect on stringing too.

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

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EL34

Re: Strings between printed objects
March 14, 2016 01:46PM

Registered: 11 years ago
Posts: 67

I am thinking that it is now warmer in my shop than during the winter and the PLA starts off warmer

I noticed that the printer is coming up to operating temp very quickly right now compared to a month ago

I have not had time to check the retraction settings yet
Hopefully in the next couple days

Thanks for all the help

My projects are listed here - [www.el34world.com]

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EL34

Re: Strings between printed objects
March 27, 2016 12:05PM

Registered: 11 years ago
Posts: 67

I finally had time to mess with the printer again

I increased the retraction from 2mm to 4mm and printed the 5 objects again

They came out way better with the extra retraction
Thanks for the help

Img_9878.jpg

My projects are listed here - [www.el34world.com]

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Paul Wanamaker

Re: Strings between printed objects
March 29, 2016 10:32PM

Registered: 10 years ago
Posts: 580

Hi El34,
Glad you got it working.

If you are interested there is a tutorial for Retraction Tuning with Slic3r, and more Slic3r Tutorials and videos here.

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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