Support material peeling from print bed  

Re: Support material peeling from print bed

Supports by design are not strongly attached to the part and in some cases to the bed ;
the best prep for your bed is to wash it with warm water and dawn dish soap (in the UK use Fairy liquid) by using a wad of clean kitchen paper towel dampen with warm water and put a dollop of Dawn on the pad and scrub (i do it twice at 90 deg to each other holding the plate by the edge as it is a phonograph record rinse under running water and dry with clean paper towel keep touching only by the edge... I do this every other day of printing with both kinds of plate.

Re: Support material peeling from print bed

[...] a phonograph record

Oh man, flashbacks to meticulously cleaning vinyl and putting it in those static-free sleeves.

Re: Support material peeling from print bed

On my prusa i3 mk3, the support material will peel up off the print bed. I use alcohol prep pads to clean the print bed every print. How do I fix this issue? I have attached some pictures of my settings, the peeling, and the preview in slic3r. https://drive.google.com/drive/folders/1AhD4TL7j0aA5_T_M5nkicgc_CMoZnFEF?usp=sharing
Looks like you've got fundamental adhesion issues. Randoph gave you the basics. 90% of the problems with 1st layers, spaghetti prints and parts popping loose mid-print come down to adhesion. Here's some copypasta...

Adhesion problems are usually caused by 2 main problems:

And above all else, avoid touching the PEI print surface.

Try those 2 steps. If you're uncertain of the Live-Z results, post pics here of the 75x75 print bottom and you'll get quick help. In general, start high (less negative) and work lower (more negative) in large increments (e.g. 0.1mm) until the filament starts to stick on its own. When it's right, you should be able to gently rub it without it coming loose. Then start lowering (more negative) the level until there are no gaps between layers.

I fought this same issue, kept thinking it was something complex. Nope. Questionable PEI = random support and other fine 1st layer line inconsistency. Clean PEI = circuit board-like traces that hold fast, look sexy and print well.

Re: Support material peeling from print bed

Looks like you could go a little closer and clean your bed a bit. I typically use scotchbrite (green side of a dish sponge) and some windex with the bed heated to "refresh" the bed rather than the dish soap method. Then I clean with windex before each print. This is what I do for PLA other materials have different prep methods and I have different sheets for ABS, Nylon, Flex.

I second the DO NOT TOUCH the bed. The smallest pieces of grease will cause the issue you have.

https://www.amazon.com/AMX3d-Piece-Print-Removal-Tool/dp/B079PMKZ5V/ref=asc_df_B079PMKZ5V/?tag=hyprod-20&linkCode=df0&hvadid=312137773434&hvpos=1o1&hvnetw=g&hvrand=12515508287824657526&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9030055&hvtargid=pla-568313010470&psc=1&tag=&ref=&adgrpid=63677138153&hvpone=&hvptwo=&hvadid=312137773434&hvpos=1o1&hvnetw=g&hvrand=12515508287824657526&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9030055&hvtargid=pla-568313010470

Try to only use metal spatulas like the ones in the link when removing prints from the bed. I really like the middle one from this link.

Remember to let the bed cool before removing prints or youll damage the PEI once you get the right amount of grip.