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tejpal
tejpal
Visitor II
September 3, 2015
Question

How does PWM timing work in L6470

  • September 3, 2015
  • 1 reply
  • 474 views
Posted on September 03, 2015 at 13:50

My question is a typical 1.8deg step motor (200 steps per rev) set for 128 micro steps will finish each micro step in <10usec at a speed of 300RPM. With a PWM period of 64us (15.625K) how this PWM can set a desired current for each micro step. Moreover how this works when motor time constant L/R is typical about a msec.

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1 reply

Enrico Poli
Enrico Poli
ST Employee
November 18, 2015
Posted on November 18, 2015 at 16:28

Hi,

if your micro stepping rate is higher than the PWM frequency the ''missing'' microsteps are just skipped.

Enrico

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