Stepper motor pulse light is not bright-CodePudding

Bosses, I use STM32 output PWM wave to drive stepper motor, the results within 10 k pulse test can turn, once I he will not turn the pulse of the MCU, indicator light is not bright, the power lamp no problem, I wiring terminal offline terminals and direction all didn't answer, pulse + 5 v power supply, pulse - answered the microcontroller PWM output pin, don't know what's the problem, hope bosses glad, if I describe not clear place though, I to supplement,

CodePudding user response:

Wrong, is the motor drives the pulse of light is not bright,

CodePudding user response:

I think mainly PWM output pulse is too narrow, more than the maximum response speed of the drive (not frequency, width of low level)

CodePudding user response:

reference 1st floor Glen_hsu response:

I think mainly PWM output pulse is too narrow, more than the maximum response speed of the drive (not frequency, width of low level)

I found the reason, he is only the current 0.01 ma, I changed the F4 board for the motor to move, I again measurement testing flow of time more than 6 ma, should it is for this reason.

CodePudding user response:

reference ABCD18282 reply: 3/f

Quote: refer to 1st floor Glen_hsu response:

I think mainly PWM output pulse is too narrow, more than the maximum response speed of the drive (not frequency, width of low level)

I found the reason, he is only the current 0.01 ma, I changed the F4 board for the motor to move, I again measurement testing flow of time more than 6 ma, should it is for this reason.

This is IO port driver ability weak ah, not low consumption model, generally set to push pull output, output current should not be very small, about 10 ma, there should be a right, even if the light coupling is Yang connection, IO port is set to open leak will resist even 6 ma...

General MCU connection light output, a note is the IO port driver ability, secondary optical coupling of the input signal level

CodePudding user response:

reference 4 floor NickyGroot response:

Quote: reference ABCD18282 reply: 3/f

Quote: refer to 1st floor Glen_hsu response:

I think mainly PWM output pulse is too narrow, more than the maximum response speed of the drive (not frequency, width of low level)

I found the reason, he is only the current 0.01 ma, I changed the F4 board for the motor to move, I again measurement testing flow of time more than 6 ma, should it is for this reason.

This is IO port driver ability weak ah, not low consumption model, generally set to push pull output, output current should not be very small, about 10 ma, there should be a right, even if the light coupling is Yang connection, IO port is set to open leak will resist even 6 ma...

General MCU to connect light output, a note is the ability to drive IO port, secondary optical coupling of the input signal level

Output is push pull, I also don't know why, is a very small current,