Weak layer on every print at the same height. HHHEEELLLPPP

[oppyfromoz 0]

Every print we have attempted has this line at approx 14mm off the bottom. This is a weak point and if you drop the part it breaks at this line. There are holes and it is almost as if the inside is starved of material and the outside skin does not print on this line leaving a missing line in the shell.DSC04341' alt='DSC04341'>

[DidierKlein 729]

Hi and welcome to the community!

What printer? Your picture isn't showing!

There was an issue with the latest electronics that make the Z stage drop suddenly.

It's detailed here

Mainly focus on this explanation:

 

Overheating due to excessive current

Due to a slight design flaw of a revision of the controller board it's possible that some printers will have a problem where excess current to the stepper drivers cause issues. What happens is that the stepper drivers overheat, the protection circuitry of the chip kicks in and shuts the driver down for a brief moment, during this moment there's a chance that the bed moves down unpredictably.

Thankfully this is usually easily fixed by simply lowering the current for the stepper motors. This is done on the printer via Maintenance -> Advanced -> Motion settings -> Current Z. The default value is 1300mA, try lowering this to 1200mA.

[brandonbrayRRS 0]

Hi and welcome to the community!

What printer? Your picture isn't showing!

There was an issue with the latest electronics that make the Z stage drop suddenly.

It's detailed here

Mainly focus on this explanation:

 

Overheating due to excessive current

Due to a slight design flaw of a revision of the controller board it's possible that some printers will have a problem where excess current to the stepper drivers cause issues. What happens is that the stepper drivers overheat, the protection circuitry of the chip kicks in and shuts the driver down for a brief moment, during this moment there's a chance that the bed moves down unpredictably.

Thankfully this is usually easily fixed by simply lowering the current for the stepper motors. This is done on the printer via Maintenance -> Advanced -> Motion settings -> Current Z. The default value is 1300mA, try lowering this to 1200mA.

 

Not sure if I'm having the same problem as the OP, but maybe you can help me as well. We just set up our Ultimaker 2+ two days ago. Initial parts look good, except for a skipped layer at the same height on every part. It occurs at approximately 11.5mm (0.45 in). Just below the skipped layer is always a ridge, seeming to indicate a double-printing and then a jump that leaves a layer unprinted.

On larger parts, this is disastrous, as the layers do not fuse together and the entire part splits at that layer. Checking the troubleshooting guide you linked to, this would appear to be an issue of the linear bearings binding. I attempted to adjust them, but there was no change. Is there a better way to adjust the bearings, or another solution I can try?

Thank you for your help!