BuildYourCNC - Motor Driver 18-50V DC Up to 4.2 amps 400 to 25000 Steps/Revolution

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Main view of the 4.2 amp stepper motor driver

View of the current table of the 4.2 amp stepper motor driver

The steps/revolution table of the 4.2 amp driver

Motor Driver 18-50V DC Up to 4.2 amps 400 to 25000 Steps/Revolution

Price Options Your Cart

DM542 4.2A Stepper Motor Driver 18-50V 400 to 25000 Step/Rev

$44.99

Our Amazon Pick

Stepping Motor Driver 18-50 volts DC, up to 4.2 amps, 400 to 25000 steps per revolution (May not have the CloudRay Printed on the Case)

$54.95

Includes free technical support.

Introduction:

You'll need this to make the Stepper Motor work. This incredible piece of electronics translates a pulse into a high powered complex coil firing combination. this particular driver allows a 3.0 amp draw from the motor and accepts 24 to 40 volts. - Datasheet

Description:

This 4.2 amp stepping motor driver provides control and power to stepper motors. Stepper motors will not function without these drivers. We also have 6 amp drivers and 2.5 amp drivers which we manufacture here at BuildYourCNC.

The driver has terminals for the digital operation side and the motor output side to provide power and function to the motor. The first two terminals on the motor output side provide power from a power source such as a power supply.

The range of voltage you can apply to these terminals is 18-50 volts. The A+, A-, B+, B- are connected to the motor coils. Generally, the stepper motor has two coils and A+ and A- will be on one coil, with B+ and B- on the other coil.

On the other bank of terminals you will find ENA-, ENA+, DIR-, DIR+, PUL-, PUL+. The rest terminals are the enable terminals. We usually don’t use these but they are available. DIR+ and DIR- are the direction terminals and PUL+ and PUL- are the pulse terminals.

The DIR+ and DIR- will receive either a high or low digital level voltage to control the direction that the motor will spin. The PUL+ and PUL- will receive a pulse train to spin the motor in that direction. For every pulse these receive, the motor will turn one step.

Between the two banks of terminals are the dipswitches. There are 8 switches and they correspond to the table found on the top of the driver. There are three settings for step and three settings for current.

The step settings set how many times the motor will step for each full step. If you set it for 1/1/1 which would be Up/Up/Up that would be the setting for full step. If the stepper motor has 200 steps per revolution, it would achieve a full revolution at 200 pulses received at this terminal.

If you set at 0/1/1 it will be a ½ step which means you will be sending 400 pulses to the terminal to achieve a full revolution.

Steps go from half to 1/125th. At 1/125th you would have to send 25,000 pulses to the terminals to achieve a full rotation.

The next table relating to the switches M1, M2, and M3 correspond to the amount of current that the driver will allow, drawn to the motor. The current range is between .9 to 3 amps. Dipswitch M4 is for half or full current during idle. If your stepper motor is getting hot while not in use, set this M$ witch to half current to reduce this heat.

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[Motor Driver 18-50V DC Up to 4.2 amps 400 to 25000 Steps/Revolution] Hello, how to tell if a driver is bad?

There are a few ways to determine if a driver is not functioning properly. In all of the recommended actions below make sure to turn off all power and allow all energy to bleed before making any changes. This usually takes about 10 seconds, but you should allow at least 1 minute as different power supplies work differently.
- First, if the red LED is on, then the driver is in an error condition telling you that either the motor is connected incorrectly to the driver (one coil is connected across the A and B terminals of the driver), or the incorrect Amp setting is used. If you are certain the motor is connected correctly, i.e. one coil is connected to the A terminals and the other coil is connected to the B terminals, then try lowering the Amp setting and try again.
- If the axis is not working at all, there may be an issue with either the wiring from the controller to the driver, the controller could be bad, the driver could be bad, the motor could be bad, or the wiring between the motor and the driver is bad. If check if the driver is bad, you can move the signal wires coming from the controller that you know is working and wire them to the non-working driver. If the axis still doesn't work, then there is a problem with either the driver or the motor. At that point, disconnect the motor from that driver and connect a know working motor to that driver. If the motor turns, then you know the problem is the motor that was disconnected. If the motor does not turn, the problem is most likely the driver, but still could be the wiring from the controller to the driver, so you will want to confirm that connection.

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[56] Hello, how to tell if a driver is bad?

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