User`s manual

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STEP MOTOR CONFIGURATIONS 4 Lead Motors
Step motors can be configured as 4, 6, or 8 leads. Each configuration requires different
currents. Shown below are different lead configurations and the procedures to
determine their output current.
6 Lead Motors
When configuring a 6 lead motor in a half-coil configuration (connected from one end
of the coil to the center tap) use the specified per Phase (or unipolar) current rating to
determine the current adjustment resistor value. This configuration will provide more
torque at higher speeds. Use this to determine the current adjustment resistor value.
When configuring the motor in a series configuration (connected from end to end with
the center tap floating) multiply the per Phase (or unipolar) current rating by 0.7.Use
this result to determine the current adjustment resistor value.
WARNING! Step motors will run hot even when configured correctly, damage may
occur to the motor if a higher than specified current is used. Most specified motor
currents are maximum values. Care should be taken to not exceed these ratings.
Use the specified series motor current to determine the current adjustment resistor
value. Four Lead Motors are usually rated with their appropriate series current, as
opposed to the Phase Current which is the rating for 6 and 8 lead motors.
8 Lead Motors
Series Connection: When configuring the motor windings in series, multiply the per
Phase (or unipolar) current rating by 0.7. Use this result to determine the current
adjustment resistor value.
Parallel Connection: When configuring the motor windings in parallel, multiply the
per Phase (or unipolar) current rating by 1.4. Use this result to determine the current
adjustment resistor value.
NOTE: After the current has been determined, according to the motor connections
above, follow the procedure Determining Output Current above to find the current
value. Then use Table 3 to choose the proper resistor value.