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Missing Brake Chopper when driving stepper motors?

Category: Datasheet/Specs
Product Number: TMC9660

Hello,

the TMC9660 seems to support the brake chopper only when driving BLDC motors. The TMC4671 seems to support the brake chopper also when driving stepper motors using the dedicated BRAKE pin 31.

Is there a way with TMC9660 to bring back the brake chopper functionality? (i.e. to automatically monitor the supply voltage and limit it by activating the copper and the connected beed resistor)

The datasheet mentions something vague for GPIO18/TIM0_BASIC_PWM, but as far as I understood this does not mimic the BREAK pin functionality on TMC4671, right?

Best regards!

  • The parameter mode reference manual gives more detail on page 14, specifically:


    BRAKECHOPPER_OUTPUT 36 5-9 Selects which pin to use for brakechopper output:
    - 0-18: GPIO0 – GPIO18
    - 19: Y2_HS (driving a low-side FET)
    - 20-31: RESERVED
    Default: 0
    Note: Y2_HS is a gatedriver output, able to drive a low-site FET.
    The GPIO outputs are digital signals not meant to directly drive
    the gate of an FET.
    Note: Y2_LS is not available when using stepper motor.