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PD2035 P&D or Digital Oscillator
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110/220 VAC input (built in 35 VDC supply) |
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125 mA - 2 amps/phase motor current |
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DIP switch selectable current from 16 levels |
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full and half step - switch selectable |
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internal ramping pulse generator with adjustable slew speed, acceleration and deceleration rates |
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10 - 1200 and 100 - 12,000 pps digital oscillator speed range (switch selectable ) |
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digital oscillator pulse output for interface to counter |
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amplifier enable input (logic signal to turn off motor current) |
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can be operated in pulse & direction or run/stop mode |
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speed can be controlled from built-in front panel potentiometer, remote potentiometer or O-5V analog signal. Connectors included. |
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pluggable screw terminal connectors for motor, power, step & direction |
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inaudible PWM amplifiers |
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optoisolated inputs |
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built in fuse |
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automatic 50% idle current reduction (defeatable by jumper) |
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drives 4, 6 or 8 lead step motors, sizes 14-23 |
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can be operated from active logic or switches/relays |
Description
The PD 2035 step motor driver contains a power supply, full and
half step phase sequencer, two switching amplifiers, a digital ramping pulse
generator and optoisolation circuits. This driver also includes a power saving
feature to automatically lower motor current anytime the motor is left at rest
for more than one second.
The amplifiers regulate motor current by chopping at a constant, inaudible frequency. Phase current is selected from 16 levels by a dip switch. Full or half step operation is also selected by the dip switch.
The internal oscillator is selected by a dip switch. In oscillator mode, the pulse input becomes a run/stop signal: when this signal is set low, the motor accelerates to a preset speed and slews. Raising the input high (to 5 volts) causes the driver to decelerate to rest. Two oscillator speed ranges are provided: 10 - 1200 steps/sec and 100 - 12000 steps/sec.
The digital oscillator derives it's timing from a quartz crystal for low drift and repeatable ramps. The speed of the oscillator can be set by an on-board potentiometer, or an external pot, or an external 0-5 volt analog signal.
The PD 2035 is built on an aluminum heat transfer plate, and is surrounded by a sturdy, ventilated steel enclosure.
Block Diagram
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Features: