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The output current of the 6415 is dip switch selectable from 5A
rms (7.1A peak in microstep mode) to 0.625A rms (0.88A peak in
microstep mode)
The drive supplies regulated phase currents for supply voltages
between 24 Vdc and 75 Vdc. It is designed for use with Pacific
Scientific's line of hybrid stepping motors and will work with
either the standard line or the enhanced performance line.
Note: The motor winding must be compatible with the output
current of the driver.
Drive features
Bipolar chopper drive - patented 4-phase PWM (pulse width
modulation) chopping electronically controls the motor winding
currents at 20 kHz frequency. This combines the best of
recirculating and non-recirculating current regulation producing
high back EMF rejection with low chopping ripple current.
Benefits include: reduced heat dissipation, low electric noise and
improved current control during motor breaking.
Microstepping - switch selectable: full, 1/2, 1/5, 1/10, 1/25, 1/50,
1/125, and 1/250 step capability with decimal jumper installed and
1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, and 1/256 with decimal
jumper removed.
Digital Electonic Damping - patented circuit eliminates torque
loss and/or motor stalling through the mid-speed region, that is
inherent in all open loop stepper applications.
Short circuit protection circuitry - disables the drive if a short
circuit occurs on the motor outputs. The drive must be power
cycled to clear fault.
Bus overvoltage - disables the drive if the voltage exceeds 83
Vdc. The drive must be power cycled to clear fault.
MOSFET power devices - allows chopper frequency of
approximately 20 KHz, eliminating acoustical noise often
associated with choppers.
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6415 Installation & Hardware Reference Manual - Rev E
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