Unipolar motors — the ones with more than four wires — are easier to control, but are severely limited in generating torque. Hey kiddo, follow your own advice e be surprised ;- Yeah, taking a stepper apart do render it useless or at least very weak much lower torque … the rotor will demagnetize a good deal if taken from inside the stator …. Page 1 of 4 1 2 3 4 Last Jump to page: Can I use this driver without damaging the stepper motor? However, if you have the appropriate control circuitry, you can increase the stepper motor torque by using the unipolar stepper motor as a bipolar stepper motor note:

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The only way to avoid losing steps with stepper motors is to oversize your motors for your application, then hope that you went big enough.

This mod is easy and useful but one must take in account that the maximum speed attainable drops dramatically since this is a bipolar SERIES configuration. And 2 other coils are just unused.

Leave a Reply Cancel reply Enter your comment here What about a stepper with a gear head attached? You cannot split the coils inside the motor because if you take a stepper motor apart you ruin it.

A bipolar stepper has two coils, and both are energised. What about 5 wire? Same as 8-wire steppers, you wire the coils unipoalr in pairs. This NEMA size hybrid stepping motor can be used as a unipolar or bipolar stepper motor and has a 1. Is position info is vital you use feedback.


Fill in your details below or click an icon to log in: By using a higher voltage along with active current limiting, the current is able to ramp up faster, which lets you achieve higher step rates than you could using the rated voltage. If you have a six-lead unipolar stepper motor as shown in the diagram below: Each phase draws 1. If you ignore the center common wire, current rating has to be half of rated value since resistance is double.

This cause an increment in the temperature for the steady state, in the running of the motor.

Changing Unipolar Steppers To Bipolar

I have a stepper with 6 wires Unipolarand I want to run it using my Xylotex Bipolar Driver, How do I figure out which wire go where?? Increasing the turns of the coils increases the inductance. I have a drivlng wire Bipolar stepper motor.

You can see this for yourself any time you bring a magnet close to a ferromagnetic material, the force gets stronger as they get closer.

Pololu – Stepper Motor: Unipolar/Bipolar, Steps/Rev, 42×48mm, 4V, A/Phase

Email Required, but never shown. The retard force is strong in this one today. Notice the Bipolar has the little circles denoting iwth wire connection. The time now is A unipolar stepper has four coils and only one sometimes two of them are energised at any one time. The extra wires in a unipolar motor are taps for each of the coils.


This rant has improved my mood no end. The answer to this question depends on the type motpr stepper motor you have. Unless your like your stepper drives smoking.

At last somebody said it! The extra turns you will get will increase the inductance and slow the increase in coil current.

Investigator Jul 29 at A 6 wire unipolar is not the same as an 8 wire universal stepper motor at mottor. Also, gravity did not change between the measurements of the unipolar and bipolar model ;- The comparison is true in any unit. One concern I have is whether connecting a unipolar stepper to a bipolar driver will cause it to lose torque holding or operating?