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Original Prusa i3 MK2/S
Assembly and first prints troubleshooting
Precise manual perpendicular xy axis calibration
 
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Precise manual perpendicular xy axis calibration  

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Andreas Balogh
 Andreas Balogh
(@andreas-balogh)
Eminent Member
Precise manual perpendicular xy axis calibration

I am always desperately disappointed when the printer's xyz calibration completes with: "slightly misaligned" or so, instead of "perfectly perpendicular". So here is a simple and effective way to get the headbed aligned 90 degrees to the frame.

  • Find a 30cm ruler and set it across the frame. Make sure the ruler touches the frame on both sides.

  • Move the heatbed to align one of the heatbed gridlines with the ruler.

  • Check and, if required, move the M10 nuts at the frame to slightly rotate the heatbed against the frame

  • Repeat until the heatbed gridline is perfectly aligned with the ruler.

    • The process assumes that the x-axis is aligned with the frame - and I think it should be. Even if the automatic xyz calibration now indicates a slight skew the ruler can be used as a reference for setting an angle between frame and y axis assembly.
    Corresponds to Step 31 of the Mk2S manual at https://manual.prusa3d.com/Guide/7.+PSU+&+Heatbed+assembly/297?lang=en .
    See also https://github.com/3d-gussner/Prusa-Firmware/wiki/How-to:-Get-hardware-as-accurate-as-possible%3F

    Posted : 25/08/2018 11:59 am
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