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The Ultra quiet LV8729 4-layer Substrate Stepper Motor Driver module with 128 subdivisions is a Best suited Moter Driver for Nema stepper motor whose current is less than 1.5A, which makes motor steady, quiet and precise.

The LV8729 is a PWM current-controlled micro step bipolar stepping motor driver. This driver can perform eight times of excitation of the second phase to 32W1-second phase and can drive simply by the CLK input.

LV8729driver module with128 subdivisionsis a good choice for Nema stepper motor whose current is less than 1.5A, which makes motor steady, quiet and precise.

Specificatoins of Lv8729 Stepper Motor Driver (for 3D Printers):

  • Specifcation:
  • Dimensions: 1.5mm * 2.0mm (Same with the A4988 and DRV8825)
  • Maximum drive current: 1.8A (Default 0.8A)
  • Operating voltage: 6V-36V, the proposed voltage is 12V
  • Support subdivisions: 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128
  • Product Process: four layer PCB board
  • In the 64 subdivision or 128 subdivision controller it has a better ultra-quiet effect.

Usage Notes For Lv8729 Stepper Motor Driver (for 3D Printers):

Driver current algorithm and its adjustment:

1. Driver current formula: I= Vref/(Rs*5), Rs=0.22Ohm, Imax=1.8A

2. Please DO NOT connect the motors when measuring the voltage, or it’s easy to burn the drive.

3. Please connect both the power supply and the USB for power when measuring the voltage.

4. Minor adjustment for potentiometer driver. Adjust it again after measurement to avoid burning driver by excessive current.

5. To increase the current by rotating the potentiometer clockwise slowly, and anticlockwise to reduce.

LV8729 Heat Dissipation Tips:

To consider heat, LV8729 uses four layers of PCB to dissipate heat,meanwhile, the chip is attached with heatsink, which is default 1A.SinceLV8729 motor drive subdivision is relatively large, in order to the stable operation of the 3D printer,any stepper motor is to actively dissipate heat, for example, using fan, hanging heat sink,or installing a large fan for your cotroller board.

Extra Notes:

Note: Please make sure the connecting direction is right, or it will probably burn the driver chip and controller board. Recommend to do a good job of cooling for the module.

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