Описание
Stepper motor driver A4988 is a device which sets modes stepper motor.
Driver A4988 used in RepRap-проектах and has several достоинств:
Easy Control, current adjustment (adjustment potentiometer) allows the use of motor at higher voltages.
Characteristics Of driver A4988:
Power supply voltage: from 8 to 35 V; Able to install steps: from 1 to 1/16 of maximum step; Voltage logic: 3-5.5 IN; Over temperature protection; Maximum current phase: 1 AND without heat sink, 2 AND with heat sink; Distance between rows of leg: 12mm; Board size: 20x15mm; Dimension of driver: 20x15x10mm; Dimension of radiator: 9x5x9mm; Weight with heatsink: 3G; Weight w/o heatsink: 2g.Set:
Stepper motor driver A4988 RadiatorTHE pair findings VDD and GND on driver stepper motor plug pins microcontroller logic power supply. STEP and DIR Pins connect to the microcontroller and meet the step and signal driving directions stepper motor respectively. TO the pins 1A, 1B, 2A and 2B plug legs stepper motor. A Pair Of findings VMOT and GND meet the power connection for engine.
A4988 stepper motor driverStep size задаётся комбинациями switches on inputs (MS1, MS2, and MS3).
| MS1 | MS2 | MS3 | Resolution микрошага |
|---|---|---|---|
| Full step | |||
| 1 | 1/2 step | ||
| 1 | 1/4 step | ||
| 1 | 1 | 1/8 step | |
| 1 | 1 | 1 | 1/16 step |