Stepper motor noises at low rpm

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i have 4 wire bipolar nema 23 stepper motor (24v power supply) connected m542t stepper driver , run on sketch arduino uno. run using sketch supplied designer of project. says mods @ own risk , offers no if change them asking here advice. project has been breadboarded , works design run stepper @ 0-10 rpm , has lcd shield show speed. has been calculated sprockets attach rest of project turn disc. problem/question stepper makes few noises , vibrates @ 0-4 rpm smooth after 10 rpm. sounds bearing click once second rotates @ slow speed. vibrates @ slow speed. , when power down, , power up, stepper makes dull thud or clunk. normal? running driver @ 1600 , amps @ 4.5 per install directions. stepper motor rated @ 3.5 amps current @1.8 degrees , 200 steps. thinking should change microstep setting 1600 higher. or advice appreciated first dive steppers , arduinos.
thanks

quote
it vibrates @ slow speed. , when power down, , power up, stepper makes dull thud or clunk. normal?
vibration nature of step motor - microstepping helps reduce it, going happen some
extent , @ resonant frequencies depend upon load.  yes on power jumps
to position full torque, that's job!

as 1 second click, sure that's not artifact of software - how steps being
generated?  might there mechanical causes outside motor itself?

running 3.5a motor @ 4.5a not - run @ 3.5a (or lower if don't need torque, it
will run cooler).


Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Stepper motor noises at low rpm


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