Features
• DC bus voltage 12-35 VDC motor supply (including
ripple)
• Switch selectable motor current from 0.4–3.5
amps/phase
• Switch selectable full or half step
• Automatic 50% idle current reduction
• Optically isolated 5 VDC inputs, step, direction
and enable
• Enable input to turn off current to the motor.
• On-board oscillator generates step pulses and
accel/decel ramps
• On-board trimpot or external speed adjustment
• 122 watts of usable power
• Screw terminal connectors
• MOSFET, dual H-bridge, inaudible PWM amplifier
• 3 state, pulse width modulated current control,
switching at 20–30 KHz.
• Drives 4, 6 or 8 lead size 11, 14, 17 or 23 step
motors
• CE compliant
Description
The 3535O step motor driver is a full or half step
drive, step phase sequencer with MOSFET three
state switching amplifiers and optoisolated circuits.
This drive has a built in ramping pulse generator
(oscillator) with adjustable speed, acceleration and
deceleration. Oscillator speed range is 400–5,000
Hz. Speed can be set from on-board trimpot or external
pot.
A jumper allows you to select the internal oscillator.
In oscillator mode, the pulse input becomes a run/
stop signal: when this signal is set high, the motor
accelerates to a preset speed and slews. Lowering
the input signal causes the drive to decelerate to
rest.
The amplifier regulates motor current by chopping
at a constant, inaudible frequency. Phase current is
selected from 32 levels by a DIP switch.