Late Extrusion Start Setting?  

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chris.m73
(@chris-m73)
New Member

Hi, I've been having this issue recently and it's driving me crazy. At the very beginning of a PLA print it takes an inch or two for the filament to extrude and stick (see photo). I believe this is a setting in my slic3r, because when I thought it was a Z adjust setting I printed https://forum.prusaprinters.org/forum/original-prusa-i3-mk3s-mk3-assembly-and-first-prints-troubleshooting/life-adjust-z-my-way/ and it did not have this issue. The bed is clean and I've tried several different temperature settings.

My sensor is a little high (live Z is set to -1.185) but since it printed the square and 1st layer calibrate fine (except for a late start), I don't think that's the issue. I have also looked at https://www.simplify3d.com/support/print-quality-troubleshooting/not-extruding-at-start-of-print/ and nothing there seems to fit.

This topic was modified 6 months ago by chris.m73
Posted : 07/04/2020 11:23 pm
joan.t
(@joantabb)
Veteran Member Moderator

Are you using 7x7 mesh bed levelling?

you can turn it on using the LCD  Menu! 

regards Joan

 

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 08/04/2020 12:31 am
louis.j
(@louis-j)
Trusted Member

I have the same problem with both my MK3S and MK2.5S

It is recent and since it is with both printers I think it must be firmware.

...
Posted : 08/04/2020 2:42 pm
chris.m73
(@chris-m73)
New Member

@joantabb

Thanks for your recommendation, but it happens at various points on the bed, suggesting it's not a leveling issue.

@louis-j

Thanks for the corroboration, I do remember I occasionally (but rarely) had the issue in the past... I haven't printed anything for a few months (I did do a couple of prints after my last firmware update, but can't remember if I had issues with them). Now I only barely managed to get one print done without it impacting but can't get another one to take. Have you had any luck or seen other users with the problem?

Posted : 08/04/2020 10:02 pm
louis.j
(@louis-j)
Trusted Member

@chris-m73

This is the first I have seen anyone mention the problem. For me, it makes a messy first layer but in the end, the print comes out OK. So I just live with it!

...
Posted : 09/04/2020 12:07 am
peter.m26
(@peter-m26)
Honorable Member

Looks if bed is not clean.

Wash with dish soap, 3x times, then dry and test,do not use alcohol and do not touch with your fingers.

And do the fist layer deep enough.

Extra help, 1 layer slower and hotter.

Filament dry? Extrude with hand and look if you get a good stream without air in it.

Posted : 09/04/2020 4:39 pm
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