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Fighting Noise

abuharskyabuharsky
in Motor Control
Hello!

Is it possible that on mega2560 with RepetierFirmware generated for stepper driver step pulses are not evenly spread?

I'm looking for all points (software and hardware) to minimize printer noise.

Comments

  • lucassslucasss
    If you want less motor noise, you can choose a silent stepper driver like the TMC2100...

  • abuharskyabuharsky
    lucasss said:
    If you want less motor noise, you can choose a silent stepper driver like the TMC2100...

    I have already TMC2100 and TMC2208, but noise still exist :(
  • RepetierRepetier
    On AVR systems you can not get exact timings. You can come pretty close which is what we do. But if interrupt is blocked the stepper interrupt also gets delayed accordingly if it would normally fire. Also on fast speeds you get double and quad stepping meaning it groups 2 or 4 steps instead of having identical gaps between them. This is just because the speed is not good enough. Up to 10000Hz it is ok. With a due you can have exact timings until 100KHz without problems and there interrupts have priority and stepper has the highest. But until now all printers had no problems with timings even if they are off a few microseconds or being grouped.
  • abuharskyabuharsky
    Repetier said:
    On AVR systems you can not get exact timings. You can come pretty close which is what we do. But if interrupt is blocked the stepper interrupt also gets delayed accordingly if it would normally fire. Also on fast speeds you get double and quad stepping meaning it groups 2 or 4 steps instead of having identical gaps between them. This is just because the speed is not good enough. Up to 10000Hz it is ok. With a due you can have exact timings until 100KHz without problems and there interrupts have priority and stepper has the highest. But until now all printers had no problems with timings even if they are off a few microseconds or being grouped.
    Thanck you very much for information!
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