2H Microstep driver - Makeblock

2H Microstep driver

2H Microstep driver

Overview

Me 2H Microstep Driver is a kind of 2-phase hybrid stepper motor driver, and adopts the power supply of DC 12~36V. It is suitable for driving the 2-phase hybrid stepper motor with voltage of 24~36V and current less than 2.0A. This driver uses the full digital current loop to implement microstepping control, so the motor features small torque ripple, low speed and smooth running, low vibration and noise. When running at high speed, its output torque is relatively high, and its positioning accuracy is high. It can be used in engraving machine, CNC machine tools, packaging machinery, transmission equipment, and other high resolution devices.

Technical specifications

● Input voltage: 12~36V DC
● Input current: less than 2 A
● Output current: 0.4~2.83 A
● Power consumption: 40 W
● Internal fuse: 6 A
● Humidity: dew and water drop are not allowed
● Dimension: 96 x 56 x 35mm (L x W x H)

Functional characteristics

● Average current control, 2-phase sinusoidal current drive output
● 8 grades of microstepping and semi-flow function
● 8 grades of output phase current settings
● Large torque at high speed
● High star-up rotary speed
● Offline function
● Photoelectric isolation signal input/output
● Over-voltage, under-voltage, over-current, and inter-phase short circuit protection function

Pin definition

● PUL: Input a pulse signal
● +5V: Common anode for signal input
● DIR: Input a direction signal
● ENBL: Input an offline enable signal
● A+: A+ stepper motor winding
● A-: A- stepper motor winding
● B+:B+ tepper motor winding
● B-: B- stepper motor winding
● DC+: anode of power supply for stepper motor
● DC-: cathode of power supply for stepper motor

Wiring mode

Connecting with Dupont wire

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Guide to programming

● Arduino programming
If you use Arduino to write a program, the library Makeblock-Library-master should be invoked to control the Me 2H Microstep Driver. This program serves to make the motor rotating on demand through Arduino programming.

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● mBlock programming
Me 2H Microstep Driver supports the mBlock programming environment and its instructions are introduced as follows:

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This is an example on how to use mBlock to control the Me 2H Microstep Driver module. mBlock can make the Me 2H Microstep Driver rotating from lower speed to higher speed again and again.

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Principle analysis

Set the number of steps per round for the motor
The driver can set the number of steps per round as 200, 400, 800, 1600, 3200, 6400, 12800, 25600 steps for the motor. Users can set the number of steps for the driver (Pulse/rev) by using the SW5, SW6, and SW7 of DIP switch on the front panel of driver. See Table 1:

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Selecting the control mode

The SW4 of DIP switch can be set as follows:
● OFF – semi-flow function
● ON – no semi-flow function
The semi-flow function refers to when no-stepping pulse exists over 500ms, the output current of driver automatically reduces to 70% of its rated output current to prevent the motor overheat.