Y-Axis losses Position while printing

Snapmaker 2.0
1

Hallo,

i have a strange problem which occurs randomly but see for yourself.
Does it have something todo with the G90/G91 command?

WhatsApp Image 2022-02-22 at 09.25.37
WhatsApp Image 2022-02-22 at 09.25.37720×1600 99.9 KB

I sliced this with cura and sended it via luban to the printer. and started it “offline” on the Touchscreen

Possible Error causes:

  • I opend and closed luban while printing several times to check the Duration
  • Maybe it was in relative movement Mode cause of calibrations before (G91)
  • Slicer error?

Further observations:

  • when the print hast stopped the printer dosn’t move completly into Y-Max position but in luban the position shows as max:
  • in that position if i want to move into y=0, it moves straight into the Hardware Limit without reaching 0.
  • If i home it, everything is fine again…until next print

Can Someone give me a hint?

2

Layer shift is mainly caused by overheated or defective linear modules.
I get this if i print really fast with a lot of stop and go moves or micromovement.

There are several threads about layer shifting in the forum. (There could be a missplaced thermal pad in the stepper electronic)

What slicer software did you use?
What settings did you print?
Is it only the shown model?
Share the gcode?

3

Overheats could be the Problem. I try to print asa with 40°C Buildroomtemperature. i try to print with pla and than i will show my results

4

Yep Overheating was the Problem. At about 75°C my Motor loses Position.

5

Most stepper motors have a maximum operating temperature of 80°C. The higher the ambient temperature, the higher the current the motor requires, and the higher the temperature the motor achieves. If your motors are getting that hot, you will most likely need to employ some sort of liquid cooling to each of the motors.

On my Ender 5 Plus I print ABS with an ambient temperature in the tent of ~42-45°C, I did need to increase the driver current by ~50%, and the motors remain below 60°C, but I do have to leave the bottom part of the door flap open to prevent overheating.

Are you certain that the ambient temperature is 40°C? I don’t know what current the Snapmaker is running the drivers at, and I don’t think that they made the G-code current setting available.

6

Yes i am. But the moduls are getting hotter and hotter on long prints. While the enclose have 40°C the black cap of the linear moduls have between 70-85