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How to Test a Stepper Motor with a Multimeter

The stepper motor is a DC motor that can be “stepped” by a microcontroller. The main parts are the rotator and stator, which are used in drives such as floppy disks or computer printers to move their print heads up and down according to instructions from software on your desktop PC through wirelessly transmitted waves of radio frequency signals called protocols–a little something we happen upon every day. In this blog post we will discuss how to test a Stepper Motor with a Multimeter.

The stepper motor is essential in any 3D printer or other machines that use these motors. When you get a damaged one, it can cause continuous electrical signals to break, making your device stop working altogether! It’s essential to check if yours has continuity. 

To test your stepper motor, you will need to use a multimeter. Make sure that the dial on top of it has ohms settings and plug both probes into their respective ports–black for the COM section (more commonly known as “essimmit”), red with a “V” next door so they’re designated respectively if coming from different sources such as wires or pins within one particular part/product themselves. Next, adjust accordingly by pinging them together until readings show up correctly; note these numbers below.
Suppose you are getting readings that range from 0.0 ohms to 1.0. In that case, it is possible your stepper rotator needs replacing because this indicates too much resistance against the electrical current flow in the motor compartment of steps per second (SPM).

What You Need to Test your Stepper Rotator with a Multimeter

It would be best if you had the following tools:
● Stepper rotator
● 3D printer
● Stepper cable that goes into the printer’s mainboard – the coaxial cable should have four pins
● Four wires in the case of stepper rotators with wires
● Digital multimeter
● Multimeter probes
● Adhesive tape

Adjusting the Multimeter

For this experiment, we need a multimeter (a device for measuring electrical resistance). The lowest reading on your instrument should be 20 ohms. This is because most stepper coil resistances are under that value, which will give us an accurate number when testing our sample later.
Plug the multimeter probes into their respective ports. If they aren’t, plug them as follows: insert the red probe into “V” next to it, and the black one should go straight onto the COM port.” regulating these values after setting up is extremely important, so do not forget.
If your multimeter is not working, adjust the settings on it. A brief beeping sound means that everything’s in good shape; simply pinging together will let you know if there are any problems with reading accuracy or warranty coverage for repairs—so get rid of anything else before taking this step.

Testing the Wires That are Part of the Same Coil

Now that you have your multimeter set, it’s time to test the wires in this coil. Connect one red wire from each side and ensure they match their respective probe.
Then take the yellow wire and connect it to your black probe. The multimeter will not beep in this case because you are using a different combination of wires for each coil, which can produce a reading if they were both attached at one point on their respective sensors (like when fishing).

To test for continuity in an electric motor, attach the red probe of your multimeter to one wire and hold it against a metal object such as copper or steel. Make sure not to touch any other parts on this circuit until you break away from them by disconnecting all necessary wires with insulated tools. Hence, they don’t short together while measuring current flow through each section.”
With the black and red wires marked, attach them with tape. Next, Attach one end of your probes to each coil by placing it into their respective colored ports on top (green for Red Probe; yellow becomes black). Now close up all connections except power supply detour DC volts through these two joined sets so they may be tested individually later if needed.

How to Test a Stepper Motor with a Multimeter

Testing the Pins in case of Pin Wire

There are usually four pins to test when you have a coaxial cable. These match up with the wires in your stepper rotator just like on any other motor or generator system, so if one breaks off, it will be easy for us to diagnose what’s wrong by looking at these connections.
To perform a continuity test for this type of stepper rotator, follow these steps:
● Connect one end of the cable to your ohm reader and place each probe into its respective slot on either side. The red light will indicate how many Ohms are in total between both connections, with lower numbers meaning better connectivity for optimal performance.
● While holding the probe on one pin, move it across all other pins stepwise. If you do this correctly, the multimeter will not beep or register any readings; your stepper needs fixing.
● You should only get ohms readings across two consecutive pins when taking your probe and attaching it to the third or fourth pin.
● Making sure to take note of any differences in resistance between each stepper rotator, you may proceed and verify the ohms values. Compare them carefully.


When checking the ohms of other stepper rotators, it is essential not to mix up cables. Different stepping motors have varying wiring systems, which could damage compatible ones if misconnected or used for an incompatible unit without first verifying their compatibility with each other by reviewing what type of wires are being used on both ends before connecting anything else into that circuit.

Ch Ashraf
With over 25 years of electrical contracting experience in the Gilawala area, Ashraf Electric provides reliable and efficient residential, commercial, and light industrial electrical services. As a locally owned company based in Lodhran, we specialize in quickly diagnosing and resolving electrical issues both big and small. Our team of highly skilled electricians is available 24/7 to ensure your electrical systems continue running safely. Whether you require a full rewiring, socket and switch upgrades, safety inspections, or lightning protection systems, contact Ashraf Electric for exceptional customer service and quality electrical workmanship.