I have a 6 wire unipolar stepper motor from a third party a typical 6 wire stepper motor connection diagram is shown in figure 1.
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Figure 1 6 lead unipolar bipolar stepper motor wiring diagram.
Since coils a and b on the diagram above are not connected the resistance between leads a1 and b1 or between a1 and b2 will be infinite.
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However all stepper motor drives currently distributed by national instruments are designed for bipolar operation.
The next diagram shows the connections for an 8 wire parallel connected bipolar stepper.
This is a datasheet of a nema 17 6 wire which can be connected as bipolar or as unipolar.
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The following diagram shows the connections to be made for an 8 wire series connected bipolar stepper motor.
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This was an old stepper motor that i pulled out my junk.
Most national instruments stepper motor interfaces do not support 6 wire stepper motors although some motors do not require the center taps to be used and can be connected normally as a 4 wire motor.
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Speaking specifically of holding torque the datasheet shows that if you turn the motor on a unipolar driver it loses 30 of the torque.
Nema 23 frame size 57 2 x 57 2mm 1 8 step angle torque up to 8 0 kg cm 111 0 oz in 6 wire.
If your stepper motor has 4 wires it is a bipolar stepper motor.
This shows that the stepper motor in general starts at a low rpm and the torque decreases as the speed increases.
Nema 23 step motor.
Is it possible to connect a 6 wire stepper motor to a national instruments stepper drive.
This is especially true for larger motors.
I have a 6 wire unipolar stepper motor from a third party manufacturer and would like to connect it to a national instruments stepper motor drive.
Bipolar stepper motors have two windings which are not connected to each other wired internally like this.
6 wire stepper motor connection diagram wiring diagram is a simplified all right pictorial representation of an electrical circuit it shows the components of the circuit as simplified shapes and the gift and signal links between the devices.
The following diagram shows the stepper motor dimensions in mm.
In the case of the buildbotics cnc controller the maximum current is 6 amps for any individual motor port.
