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TPU error code Material issue


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Posted · TPU error code Material issue

Hi all,

 

I have some problems when I print with Ultimaker TPU. I still don't get it. Sometimes I can print a few hours without a problem. When I print the same item the next day I get trouble. But it also happen that the first part has a lot of trouble with the error 'Material Issue' and the second part is printing without a problem.

 

Sometimes the S7 gives me 1 time the error. Pres play again and it runs. But most of the times it comes repeataly back while printing.

 

the QR code is https://support.ultimaker.com/s/article/1667412704163 I already follewed these steps. Still the same result. I also unloaded material and loaded it again. Sometimes this works.

 

So the material is dry because I store it in a dry station. I cleaned the printcore before use. I check the feeder and filament on grinding. This problem occure with TPU and with multiple print.

Currently I am testing with Ninjaflex. It runs fine few multiple hours until now I see the same error. (Yes Ninjaflex is dry. the feeder takes it directly from the dry tower. not from the Ultimaker material station)

 

I already have read about disable the flow sensor. That option is still on 'let's try and test' list

 

 

20250121_084037.jpg

20250121_083939.jpg

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    Posted · TPU error code Material issue

    Your friendly assistant moderator Slashee here 🐄🙂

    I don't know UM printers so I can't help you there but I'll move this to the "UltiMaker 3D printers" board where people who know more than me about UltiMaker printers hang out, you're probably more likely to get an answer there.

     

    If nobody hanging out there can fix it then you should contact UltiMaker support directly since official support isn't offered through the forums.

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    Posted (edited) · TPU error code Material issue

    Common issue on our side with TPU.

    For us it's always one of 2 issues:

    1 (99%): just a false positive on the flow sensor. Unfortunately the only fix for this is to disable the flow sensor, which is something that we always do at this point with TPU. Nothing is actually wrong with your material/feeder, and it'll just proceed normally throughout the entire print with the flow sensor off.

     

    2 (1%): the feeder was hungry and started to eat away at the filament. It doesn't sound like this is your issue.

     

    My recommendation is to just turn the flow sensor off when you're printing TPU, and if you start getting issue #2 to limit the maximum amount of retractions significantly.

     

    Edit: while I don't know the actual cause, I suspect that it's just the material stretching/flexing in such a way during its pass through the feeder that the flow sensor doesn't detect any material movement for a while. TPU is relatively flexible, after all.

    Edited by PizzaTijd
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    Posted · TPU error code Material issue

    @PizzaTijd dankje

    This morning the TPU print was paused again with the error. First pressed play again, unfortnaly it paused again. Now I have switched the flow sensor off. Keep you posted if it works

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    Posted (edited) · TPU error code Material issue

    @PizzaTijd I switched off the flow sensor. From the layer I got the material issue I have now underextrussion. I checked the feeder and it was not hungy. Well this is now with a Ninjaflex TPU filament. Now I go try to increase the temperature of look voor bowden tubes will less friction.

    So when I use Ultimaker TPU and got the material error again I will also test the flow sensor disable method

    Edited by FloTob
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    Posted · TPU error code Material issue

    @PizzaTijd I printed a few air hoses. Putting the sensor off is working. Also I found out that the room temperature where the printer is was a night time too low.

     

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    Posted · TPU error code Material issue
    5 minutes ago, FloTob said:

    @PizzaTijd I printed a few air hoses. Putting the sensor off is working. Also I found out that the room temperature where the printer is was a night time too low.

     

    Glad to hear it's working alright now!

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