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brandonbrayRRS

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Posts posted by brandonbrayRRS

  1. Hi,

    We've just set up our first printer, Ultimaker 2+, and for the most part it's worked great. But it consistently skips one layer while printing. I've posted about it as a reply to another thread that sounded similar, but it hasn't shown up. So I'm starting a new topic to hopefully have it seen and see if if any of you can help.

    In the picture below, you'll see a sample part with a skipped layer approximately 11.5mm (.45") from the base, making it layer 191 or 192, as every layer is .06mm thick according to my settings. Just below it is a ridge where I expect some PLA has squished out from the build plate not dropping enough or at all for that layer. After the gap, the printing continues as normal and the final height is to print. All other dimensions are to print, as well.

    After consulting the troubleshooting page, it appears the build plate's linear bearings could be binding on their shafts, as the skipped layer is very consistent from part to part. I attempted to adjust the bearings as explained on that page, but it hasn't seemed to help. Is there a more reliable way to adjust the bearings, or something else I can try?

    Thank you for your help!

    Best regards,

    Brandon Bray

    20160318_112246_2.jpg

  2. 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.

    20160318_112246_2.jpg

    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!

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