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    flywing
    Mar 17

    all prints very small

    in PandaPi FDM 3D printer

    my pandapi 2.8 with TMC2209 and M8 threads and DIY printer frame prints all prints very very small 1/10 of normal size all other things seeems to be ok

    i changed stepper motor configuration to 2560 because of M8 threats but printer prints very very small then i changed to 8560 nevertheless printer prints very very small

    someone here around which can solve this strange behavior?

    17 answers0 replies
    0
    17 Comments
    Y
    Yue Mark
    Jun 14

    this power regulator chip is TPS54331DDAR

    TPS54331 3-A, 28-V Input, Step Down DC-DC Converter With Eco-mode™ datasheet (Rev. F) (ti.com)


    1

    flywing
    Jun 13

    ok i will try it, is it possible to get such power regulator somewhere? I could not find such regulator obvious with the numbers of the chip 2 regulator


    1

    Y
    Yue Mark
    Jun 13

    seems that the 5V power regulator chip burned,you can replace the burned chip 1 with chip2 if you have solder tools. the chip1 and chip2 are the same chip.


    all the 5V power supply on the board include the Pi are from this chip 1.


    the chip 2 is used as the power supply for the fan connectors of group b which are not used normally.





    1

    flywing
    Jun 13

    today i want to check the smal print problem again but after i pluged the power cord in there was a burning odor after unplug power and plug again the board stop working what will be the problem?








    1

    tharn
    May 17

    Probably you are exceeding the maximum pulse rate for the motor controllers since you have such a high steps/mm. You may need to reduce the microstepping divisor for the motor controller.


    If you are using 1/32 or higher, please try 1/16 or 1/8. I can not tell you how to make that change.

    1

    flywing
    May 17

    nothing changed but via display i can change the step values but printer prints very sma