A350 starts calibration in the middle of X=0

Snapmaker 2.0
1

Hey all!

I just got my A350 put together, updated the firmware to latest and verified home against some images I saw shared around and all looks well. The issue starts when I go to calibrate (5x5). When it says it’s moving to point #1 it actually goes to what looks more like point #15, about halfway up the build plate on the X=0 (operator left) side.

This is not my first rodeo as I’ve had multiple other 3d printers but it is definitely the first time I’ve seen anything like this. I triple checked my cable connections and flipped it back to verify my attachment points underneath all look correct and I can’t find anything wrong there.

If there’s any images or anything else I can grab let me know!

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2

Are you able to Jog the build plate all the way back?

3

checking now - I am noticing it make a loud hum when it should be moving back at about the halfway point :confused: Super worried this is the bad Y issue…

@albutch So it does jog all the way back without issue

Edit: Additional note - during the calibration I can “assist it” by gently pushing the plate back as it’s trying to move. The hum no longer happens when I do that BUT there is a bit of ‘cachunk’ about half way back.

Edit 2: The more I move it back and forth and the more I ‘assist’ it it seems to be making less and less noise. I am not a believer that things “fix themselves” though so… would still love an answer to this!

4

If its getting better then you probably had it slightly out of square during assembly (probably because the holes are just a touch off) and ass you work the machine one stepper is skipping steps and bringing itself into the proper alignment. This is just my guess and I will defer to some anyone with more mechanical know how then me.

5

It is,unfortunately, still making small ‘cachunk’ noises at nearly dead center. Only while moving away. I will likely open a support case preemptively.

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6

Try loosening all the screws that hold the aluminum under bed to the rails (should be 8 screws if memory serves) and see if the problem persists.

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7

@Atom You have saved me an immense amount of time and trouble! I never considered that overtightening would cause those to misalign. After resolving that the calibration ran perfectly and I am now getting superb 1st layer adhesion.

Thanks again!

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