Suddenly layer shifts... But only on Y...

[FearNaBoinne]

I've printed many things on my (stock) A10M, and most of the prints worked just fine, until 3-4 days ago, I had a weird incident... My BLTouch sensor was deployed and blinking, and caught on the item that had been printed... I had to reset the sensor and re-home the printer to get everything aligned correctly again...

I found that the bracket had been bent out of shape, so I had to re-calibrate the Z offset.

Anyway, since then, printing with the same settings caused SERIOUS layershifting.

I have since reset the EEPROM (M502-M500) to ensure any jerk settings, etc. are stock standard, and redone the calibration. I also decreased the print speeds to 45 and movement speed to 60 (from 60 and 100)

Printing the same item as before now still gives layer shift - but only in Y direction, so it is definitely bed related - after about 1cm in height...

I have not yet re-opened the cpu case to measure the driver voltages again, but I verified (and for some drivers re-tuned) them a while ago when I just had the printer and had layer shifting as well...

I'm getting a bit tired of the inconsistent behavior (not to speak about the ~20 meter in wasted PETG filament so far!), so any useful suggestions are welcome!

[William]

Hi, If it refers to the y-axis layer shift,
You can check the tightness of your belt and make appropriate adjustments;
Check whether the bearings and pulleys are issued with a card.
Printing speed reference range: 30-60mm / s.

[FearNaBoinne]

Printing speed reference range: 30-60mm / s.

I also decreased the print speeds to 45 and movement speed to 60 (from 60 and 100)

Printing the same item as before now still gives layer shift - but only in Y direction, so it is definitely bed related - after about 1cm in height..

So that is within specs. and I could print at higher speeds before...

The belt is tight

What do you mean with:

Check whether the bearings and pulleysare issued with a card.

Thanks and have a great 2020!

[William]

Hi,thanks,Happy New Year!

You can check whether the lower bearing and pulley can move smoothly,

If the card is issued, lubricating oil can be added.