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A4988

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Basic Parameters​

  • Compatible with: Marlin/Klipper/RRF firmware
  • Over-temperature shutdown protection
  • Ground short-circuit protection
  • Load short-circuit protection

Pinout​

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Installation on FLY Motherboard​

  • Ensure the EN pin is aligned with the top-left corner during installation
  • FLY's DP5, PRO X10, and MMU can only use TP drivers
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Driver Current Adjustment and Microstep Configuration​

  • Driver Current Adjustment Instructions
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  • The 4988 uses standard jumper cap mode; simply install all four jumpers and configure 16 microsteps
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Klipper Reference Configuration​

  • The 4988 does not require driver configuration such as [tmc5160 stepper_x] or [tmc2209 stepper_x]; these are unnecessary, and configuring them will prevent normal operation

  • Set microsteps: to 16

  • enable_pin must be prefixed with !: The A4988 enable pin is active low, so the ! prefix must be added to invert it in the configuration, e.g., enable_pin: !gpio1. Otherwise, the motor will not lock.

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