This tiny Unipolar stepper motor driver has been designed around SLA7078MPR IC from Sanken, It is unipolar stepper Motor driver can handle current up to 3 Amps, micro-stepping up to 1/16 steps. On-board Jumpers to set the Micro-stepping, Preset (Potentiometer) to set the current.

Les muestro mis avances en el control de un motor PAP unipolar de disquetera vieja. Esta controlado por un PIC 16f628a y el integrado ULN 2003. 3A Unipolar Stepper Motor Driver. Unipolar stepper board is high efficient stepper driver for Unipolar stepper motor been design for various application like robotics, control routers, lathes, mills, PCB drillers and engravers. This board has been designed to be used in two ways, Stand Alone and Microcontroller Interface or Auto Half Current.

The SLA7070MPR series motor driver ICs features unipolar drivers. The clock-in type input interface allows simplified control logic, and options for built-in sense current detection and load circuit short or open protection (patent pending) provide lower loss, and lower thermal resistance. The built-in excitation distribution circuit (sequencer) allows motor control using only the CLOCK signal for simple operations (rotate/stop), with motor speed control by frequency input into CLOCK pin.

This eliminates logic signal lines required for conventional phase-input methods, and reduces demand on heavily-used CPUs. Unipolar stepper board is high efficient stepper driver for Unipolar stepper motor been design for various application like robotics, control routers, lathes, mills, PCB drillers and engravers.

This board has been designed to be used in two ways, Stand Alone and Microcontroller Interface or Auto Half Current. Stand Alone Just to Rotate Motor normally bellow inputs required: • Pulse (Step Pulse In) Frequency • Direction • 5V DC • GND • SYNC and REF doesn’t Required for this operation. Microcontroller Interface or Auto Half Current For Micro-Controller Interface or Auto Half Current (while Motor is in Hold-State): Usually In Motion control and CNC application stepper motor driver required auto Half Current function specially while motor is not moving and it’s in hold-state. For this operation SYNC and Ref required input signal. • SYNC input is for chopping synchronous function to protect from abnormal noises that may occasionally occur during the Motor Hold-State. This function can be operated by setting SYNC pin at high level.

• Ref/Sleep1 – To set the half current in Motor Hold State this pin required appropriate voltage input. Also this pin can be use to driver in to sleep mode by just applying High level to this pin. Note: To set the half current read. Specifications • 10 Pin Header connector for signal inputs, Step, Dir., 5V, Sync, V Ref./Sleep • Reference Voltage VS Output Current: 0.1V to 0.45V, 0-3Amps • Micro-stepping via on board jumper settings • Micro-stepping possible: Full Step, Half Step, 1/4th Step, 1/8 Step 1/16 Step • Onboard preset for current adjustment • Supply input and stepper connection via screw terminal connector • Inbuilt fault protections in ic for over temp and short circuit • Power supply 12-42 VDC @ 3 A • For Normal Operation, V Ref. Should be less than 1.5V, Applying a voltage greater than 2.0V ( High level) to VREF pin disables the drive and puts the motor in free state (Coast) Schematic.

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The EasyDriver is a simple to use stepper motor driver, compatible with anything that can output a digital 0 to 5V pulse (or 0 to 3.3V pulse if you solder SJ2 closed on the EasyDriver). The EasyDriver requires a 6V to 30V supply to power the motor and can power any voltage of stepper motor. The EasyDriver has an on board voltage regulator for the digital interface that can be set to 5V or 3.3V. Connect a 4-wire stepper motor and a microcontroller and you’ve got precision motor control! EasyDriver drives bi-polar motors, and motors wired as bi-polar. 4,6, or 8 wire stepper motors. This EasyDriver V4.5 has been co-designed with.

It provides much more flexibility and control over your stepper motor, when compared to older versions. The microstep select (MS1 and MS2) pins of the A3967 are broken out allowing adjustments to the microstepping resolution. The sleep and enable pins are also broken out for further control.

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Note: Do not connect or disconnect a motor while the driver is energized. This will cause permanent damage to the A3967 IC.

Note: This product is a collaboration with Brian Schmalz. A portion of each sales goes back to them for product support and continued development. Does your extrude require 0.8A per phase, or 0.8A in total? The EasyDriver supports up to 0.7A per phase, or 1.4A peak for the entire two-phase motor.