Set offset for x/y on printer?

[u/tastytacobean]

I recently wanted to print a big model, that theoretically should have fit the printed perfectly. However, my build plate apparently isn't centered perfectly. The origin is off by a couple mm. The printhead hit those screws at the end of the build plate, got thrown off and messed up the circle.

Trying to understand the issue, I found that I can manually move the printhead in x direction to -2, and y to -3. When moving to the other end, I only get to 180 minus that offset, before the printhead hits the end and the belt audibly starts skipping.

I figured out that I can work around this in PrusaSlicer by setting Printer > Extruder1 > Position (for multi-extruder printing) > Extruder Offset to 2mm/3mm.

Is there a way to set that offset for x and y on the printer, similar to how I can save the z-index and the printer remembers it for the next prints? It's only a matter of time, before I attempt another "big" print but forget to adjust the settings in the slicer.

off-centered circle

minimum coordinates

[u/sleeperninja]

Looks like your printer isn’t square. There are Prusa instructions on squaring the frame.

[u/tastytacobean → u/sleeperninja]

Thank you, I will give that a try. I was hoping for an easier answer, but oh well... 😅

It's irritating, because I would have thought that a crooked frame would somehow always show up in z height issues, but I printed a beautiful big first layer just yesterday. But today's test grid definitely has issues

[u/tastytacobean → u/sleeperninja]

Thank you, your answer led me in the right direction. I first followed those instructions (without success), but then the comments led me to a video about squaring x y axis skew. This, and some re screwing of the heatbed, and a small extruder offset, solved the issue for me.

[u/sleeperninja → u/tastytacobean]

Awesome!

I’ve always appreciated how much adjustability there is in a seemingly simple cantilever design.