Part Shift Again

[wo4sunhao]

The printer still shift during printing.
Here are things I already checked below.
Belt Tension-Checked
Printing Surface-Checked
Right nozzle Distance-Checked
Printing File-Checked(because I use exactly same file to print for couple times, It shifted on first time and it succeed on second time then it shifted again with different directions and layer height on third time)
Ambient Temperature-Checked(Pretty constant 70f)

The only thing I did not check is the electronic part and the driver of the printer, and I know nothing about it. So what your guess guys? and, how to check or monitor the electronic part during the machine is printing?

I can give more information if it helps.

[Vice Chief]

Do you have any image of the failed part?

[cabriggs]

I had the same problem. I removed the second nozzie and it has not happened again about 15 print jobs later.

Chris

[maxamillo]

Have you tried raising the Z height? Thumb screw in the front left corner.

[detroitus]

This happened to me a while back at about 80% of the way through a 76 hour print. Turned out that the entire glass print surface had shifted slightly in the 'x' direction. I started using additional binder clips on the left and right sides of the build platform and it hasn't happened since.

[wo4sunhao]

I had the same problem. I removed the second nozzie and it has not happened again about 15 print jobs later.

Chris

so you mean it happened again after 15 print jobs?

[wo4sunhao]

Have you tried raising the Z height? Thumb screw in the front left corner.

you mean the screw that touch off z axis zero switch?

[maxamillo]

Have you tried raising the Z height? Thumb screw in the front left corner.

you mean the screw that touch off z axis zero switch?

Yes.

[wo4sunhao]

Have you tried raising the Z height? Thumb screw in the front left corner.

you mean the screw that touch off z axis zero switch?

Yes.

I did not use that screw but I use the z offset to move the nozzle little bit further away from the part.

[detroitus]

you mean the screw that touch off z axis zero switch?

Yes.

I did not use that screw but I use the z offset to move the nozzle little bit further away from the part.

I would suggest always using that screw to adjust the z distance between your nozzle and the build surface. It may take a little trial and error to get it just right, but you can usually tell from the first few lines of your base layer if the gap is set just right. There is a nice image to serve as a guide here:

viewtopic.php?f=8&t=8419&p=30759&hilit=z+height#p30759