Part Shifting Again Again and Again

[Vicky@Raise3D]

Based on your description, I would recommend to do one or more times of the alignments.
Even when we need to do the alignment for the axis in our lab, we will carry it out several times based on the printing result. Normally the shifting will be reduced some then reduced until none.

[Snalios]

We're having the exact same issue with shifts. Different directions. Different locations. All my connection points are tight. I've done the gantry alignment once so far. I can check the driver voltages, but at this point we can't trust this printer to complete anything without a shift.

[Snalios]

I also tried moving the print head with the motors enabled. No movement what so ever. Also, my motor couplers are tight and show no signs of fatigue.

[Alex M.]

We're having the exact same issue with shifts. Different directions. Different locations. All my connection points are tight. I've done the gantry alignment once so far. I can check the driver voltages, but at this point we can't trust this printer to complete anything without a shift.

When does it shift? Right in the beginning or a ways in to the print? If it's the later, did you check the motor temp after printing for a while?
Also, I am assuming your rods are clean and greased?

[Snalios]

Rods are cleaned and greased. It generally happens later in the print. So I will definitely check motor temp.

[Vice Chief]

One possibility would be that the filament is "holding" the gantry at one point in the print. If the motor torque is marginal or the roll is catching briefly, it could cause lost steps and a layer shift.

This could be in conjunction with your motors overheating (and so losing torque).

[Snalios]

Was told to decreased X/Y rapid movement speed to increase torque from extra tension from filament sensor. Also to install full length guide tube. I had 2 small pieces attached to either end before. I have my electronics box open to allow for better air flow. And the print I'm running now was sliced with Ideamaker and not S3D. Was told S3D has different accelerations values fro the motors which could be at fault.

[wo4sunhao]

Based on your description, I would recommend to do one or more times of the alignments.
Even when we need to do the alignment for the axis in our lab, we will carry it out several times based on the printing result. Normally the shifting will be reduced some then reduced until none.

so how to do the alignment? and do you mean gantry alignment?

[Vicky@Raise3D]

Yes, the gantry alignment. Because the support team told me that you informed them that the alignment helped reduced some shifting then before.