EM522-CAN Field bus Stepper Drive User Manual V1.0
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4.3.2 Connections of 6-lead Motor
Like 8 lead stepping motors, 6 lead motors have two configurations available for high speed or high torque operations. The
higher speed configuration, or half coil, is described, because it uses one half of the motor’s inductor windings. The higher
torque configuration, or full coil, uses the full coil windings.
(1) Half Coil Configuration
As previously stated, the half coil configuration uses 50% of the motor phase windings. This gives lower inductance, hence,
lower torque output. Like the parallel connection of 8 lead motor, the torque output will be more stable at higher speeds. This
configuration is also referred to as half chopper. In setting the drive output current multiply the specified per phase (or
unipolar) current rating by 1.4 to determine the peak output current.
Figure 5: 6-lead motor half coil (higher speed) connections
(2) Full Coil Configuration
The full coil configuration on a six lead motor should be used in applications where higher torque at lower speed is desired.
This configuration is also referred to as full copper. In full coil mode, the motors should be run at only 70% of their rated
current to prevent overheating.
Figure 6: 6-lead motor full coil (higher torque) connections
4.3.3 Connections of 8-lead Motor
8 lead motors offer a high degree of flexibility to the system designer in that they may be connected in series or parallel, thus
satisfying a wide range of applications.
(1) Series Connection
A series motor configuration would typically be used in applications where a higher torque at lower speed is required.
Because this configuration has the most inductance, the performance will start to degrade at higher speed. In series mode, the
motors should also be run at only 70% of their rated current to prevent overheating.
Figure 7: 8-lead motor series connections
