Parker: Stepper Drive (OFS350-DRI)

The OFS350-DRI is a microstepping drive offering 400 to 12,800 steps per revolution, a step phase sequencer with MOSFET three-state switching amplifiers, and optoisolated circuits. The drive includes an automatic feature to lower motor current by 50% whenever the motor is left at rest for more than one second. (This feature can be disabled.) There is also a switch-selectable self-test that rotates the motor one-half a revolution in each direction at 100 steps per second. The amplifier regulates motor current by chopping at a constant, inaudible frequency. Phase current is selected from 32 levels by a DIP switch, which also controls the microstepping resolution.

OFS350-DRI Features:

• DC bus voltage 12-42 VDC motor supply (including ripple)

• Switch selectable currents from 0.4–3.5 amps/phase motor current

• Switch selectable Step resolutions: 400, 1000, 2000, 12800 steps/rev.

• Switch selectable idle current reduction, 0 or 50%

• Optically isolated 5 VDC inputs for step, direction and enable

• Enable input to turn off current to the motor

• Self-test, switch selectable

• 140 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, 23 or 34 step motors

• CE compliant

Model No.: OFS350-DRI, OFS350-DRI-LV111, OFS350-DRI-LV113, OFS350-DRI-LV171, OFS350-DRI-LV173, OFS350-DRI-LV231, OFS350-DRI-LV233, OFS350-DRI-LV341