tobias.k3
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What are your settings using Linerar Advance ?

Sun Nov 05, 2017 9:39 pm

I'm experimenting with the current RC2 firmware and the linear advance feature on my Prusa MK2S .

The recommended K-values https://github.com/prusa3d/Prusa-Firmwa ... v3.1.0-RC2 work pretty well for me. Corners look much more precise than without linear advance. I printed with PLA (dasFilament) on 0.2mm layer height (current speed settings see below).

I also tried Matt's K calibration https://mattshub.com/2017/10/02/linear-advance/ . I do not see a huge difference but 10-50 seems to be okay.

What K-values are you using?
What are your speed settings? Did you tune everything up to 100mm/s, even the outer perimeters?
Did you try the Matt'S K calibration?
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slicer settings 020mm.png
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Area51
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Re: What are your settings using Linerar Advance ?

Sun Nov 12, 2017 1:50 am

I have been experimenting too with Slic3r speed setting in 3.1.0-RC2. My current setting for printing in PETG is 50% speed increase:
Prusa Speed Setting after LA 1.5.JPG
Prusa Speed Setting after LA 1.5.JPG (56.92 KiB) Viewed 524 times
The increased speed made "ghosting" worse I had to lower XYjerk from 10 to 8 - there is still ghosting but less than before using LA.
I have decreased the perimeter/infill overlap from 25% to 15% as the larger value is not needed anymore.
Retract is also decreased from 0.8mm to 0.5mm, but zero length gives too much ooze.
Best K factor for PET is 45, found with K-Line.Test.gcode.

All in all the the linear advance in the firmware works and gives me 50% more speed with the same or better quality :D

Anyone else been playing with the new firmware?
Take a look at my things on Thingiverse ;)

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martin.m25
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Re: What are your settings using Linerar Advance ?

Sun Nov 12, 2017 4:39 pm

Do you use this with single or multi material printers? I would think that with the long bowden tube to the remote extruder motor, stiffness is much worse than with the single color version and the gain much bigger.

- Martin

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PJR
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Re: What are your settings using Linerar Advance ?

Sun Nov 12, 2017 6:34 pm

martin.m25 wrote:
Sun Nov 12, 2017 4:39 pm
Do you use this with single or multi material printers? I would think that with the long bowden tube to the remote extruder motor, stiffness is much worse than with the single color version and the gain much bigger.

- Martin
Yeah, the MMU requires K-values well in excess of 200 (my test came up with 470, but real printing around the 300 mark), but otherwise settings (except retraction) are pretty similar.

Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss.

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Area51
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Re: What are your settings using Linerar Advance ?

Mon Nov 13, 2017 3:39 am

My settings is for single material MK2S.
Take a look at my things on Thingiverse ;)

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Alomamabobo
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Re: What are your settings using Linerar Advance ?

Mon Nov 13, 2017 5:16 pm

Thanks for sharing ;)
Prusa i3 MK2S firmware 3.0.12.
FlashAir card.

manu
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Re: What are your settings using Linerar Advance ?

Tue Nov 14, 2017 10:12 pm

Did some of you change something in the Extruder settings (Tab 'Printer Settings') while dialing in Linear Advance? I've read that retract can be reduced and wipe/coasting should be disabled. Anybody tested this?
Design, Print, Repeat

gert.l
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Re: What are your settings using Linerar Advance ?

Wed Nov 15, 2017 9:20 am

Did some of you change something in the Extruder settings (Tab 'Printer Settings') while dialing in Linear Advance? I've read that retract can be reduced and wipe/coasting should be disabled. Anybody tested this?
I did that, turned off wipe/coasting and lowered the retraction from 0.8 to 0.4 as per the instruction.
Works fine for me. The seam is less visible for me know and 90 degree corners are more sharp.
---
Gert

manu
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Re: What are your settings using Linerar Advance ?

Wed Nov 15, 2017 10:29 am

gert.l wrote:
Wed Nov 15, 2017 9:20 am
I did that, turned off wipe/coasting and lowered the retraction from 0.8 to 0.4 as per the instruction.
Works fine for me. The seam is less visible for me know and 90 degree corners are more sharp.
Thanks for the info. Are your speed settings similar to the screenshots posted at the beginning of the thread?

Regards

Manu
Design, Print, Repeat

gert.l
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Re: What are your settings using Linerar Advance ?

Wed Nov 15, 2017 11:08 am

Thanks for the info. Are your speed settings similar to the screenshots posted at the beginning of the thread?
I almost only print PETg, i uppered it from 40mm/s to 60mm/s, first layrer 40%.
Works fine .

Could go for higher speed i guess but it gets to noisy.
---
Gert

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