Jump to content
UltiMaker Community of 3D Printing Experts

Ultimaker S5 Bed level sensor bad


Recommended Posts

Posted (edited) · Ultimaker S5 Bed level sensor bad

Hi guys


i have a bad leveling sensor. i guess..  

almost every time i try to print it will fail its initial bed leveling procedure and therefore stop.

when i then go to diagnose the bed sensor it tells me about 50% of times it has a bad connection 50% is says beeing at error..  (also, that diagnose takes for eever to run...)

Wiggling the cables, replugging, restarting the hole machine sadly has no effect.

so i cant print.


i found i need a new bed-sensor board.  does somebody know where i can order that piece?

Edited by yzorg
  • Link to post
    Share on other sites

    Posted · Ultimaker S5 Bed level sensor bad



    I don't think a new sensor board will solve your problem. There is basically nothing on this board, except the two wires. A common failure is that one of the two wires got loose on the board itself. Double check that. 


    Another failure could be that one of the cooling fans have a problem. Sounds strange, but they interfere with the sensor. Check also these wires of both side fans. Check if the isolation is somewhere damaged.


    Then the bed itself can be the reason. Try if it gets better when you turn the screws at the bottom to raise or lower the glass. After that do a manual leveling. If the distance is too high or too low, the sensor gets often wrong values and the active leveling fails.


    The sensor logic with the electronic part is on the print head PCB and this is much more expensive than the sensor board, so we should first check all the other possibilities. 

    • Like 1
    Link to post
    Share on other sites

    Posted · Ultimaker S5 Bed level sensor bad

    Regarding the distance between the plate and the glass, I found a picture from an older post I did in the past:




    It doesn't matter if you are off a little bit, but to get a feeling what is a working distance.

    • Like 1
    Link to post
    Share on other sites

    Posted · Ultimaker S5 Bed level sensor bad

    Hi there.


    Just come to think about this issue.

    You may check this tread, here you'll find some interesting tip.

    Check the insulating on the right side (under cartridge 2), -the insulating over the right hand side"locking tab" for the captive sensor plate. If this happen during leveling or when printing with nozzle 2, this could be the error.

    There is two locking tabs holding the captive sensor plate in position the L/H side tab do not need insulation.

    These two metal tabs is not grounded. However, on the R/H side the ground power cable (for the cartridge heating element) is very close to this insulated tab. So if there is a short at this point, the bed leveling will fail.

    As this cartridge can/is moving up/down quite often during double core printing, -this is a critical point to check that this insulation (the black heat shrink tube mounted on this tab) are without signs of wear and tear.








    • Like 1
    Link to post
    Share on other sites

    • 3 weeks later...
    Posted · Ultimaker S5 Bed level sensor bad

    also, my print quality improved by orders of magnitude.. i get supersmooth prints now..

    i had quite brutal ringing on my prints..

    all fixed by the latest firmware update.   Nice!   i thought my settings or the settup was the problem.

    • Like 1
    • Thanks 2
    Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now

    • Our picks

      • New here? Get ahead with a free onboarding course
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 14 replies
    • Create New...