Printing large flat lid  

RE: Printing large flat lid

RE: Printing large flat lid

This is the  bottom view ie side attached to the bed

Please save your project as a .3mf file

Files > Save Project as

Zip the .3mf and post it here. It will contain both your part and your settings for us to diagnose.

Cheerio,

RE: Printing large flat lid

Have a look at this, perhaps this can help you with your problem: https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-user-mods-octoprint-enclosures-nozzles/guide-nylock-mod-for-mk3-and-mk3s/
I have this installed on my MK3S+ for some years now and first layer quality is almost as even as on my MK4. It is a bit involved with installing OctoPrint, the bed levelling plugin, installing the nylock mod itself on the printer, but after the initial setup the bed levelling has been rock-solid on that printer.

RE: Printing large flat lid

First question would be is it placed flat to the bed ?  or at a very slight angle.  That would be answered with the project file that Diem requested.  

RE: Printing large flat lid

RE: Printing large flat lid

https://drive.google.com/file/d/1mt1Yqa560qk_CRryzs3PVBKyXa54Roau/view?usp=sharing

RE: Printing large flat lid

Well that explains that.  Your lid is NOT flat to the bed but angled, and not just slightly.  Its about 7.5 degrees off.  Use the place on face tool.  https://help.prusa3d.com/article/place-on-face-tool_1781

@neophyl has it right:  Place it flat.  The nylock mod would make no difference.

Cheerio,