Full Step & Half Step Drivers

In full step operation, a hybrid stepper motor steps through the normal step angle (e.g. 200 step/revolution) causing the motor to rotate 1.8° per full step, while in half step operation the motor rotates 0.9° per full step. Full step mode is typically used in applications where torque and speed performances are less important, wherein the motor operates at a fixed speed and load conditions are well defined. Typically, stepper motors are used in full step mode as replacements in existing stepper motor systems, and not used in new applications. Half step mode generates steps that are half the normal step size. Therefore, this mode provides twice the resolution of full step mode. In full or half step mode, problems with resonance can prohibit operation at some speeds.

AMP 3535

Full & Half Step Drivers from Applied Motion Products

Applied Motion Product's Model 2035 Full/Half Step Driver – The 2035 step motor driver contains a full and half step phase sequencer, two switching amplifiers and optoisolation circuits. This driver also includes an automatic feature to lower motor current anytime the motor is left at rest for more than one second. The amplifier regulates 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. Features include:

Applied Motion Products 2035

  • Accepts 12-35 VDC motor supply (including ripple)
  • 125 mA - 2 amps/phase motor current
  • DIP switch selectable current from 16 levels
  • Jumper selectable full and half step
  • Inaudible PWM amplifiers
  • Automatic idle current reduction
  • Drives 4, 6 or 8 lead step motors, NEMA sizes 14-23

Full & Half Step Drivers from Haydon Kerk

Haydon Kerk Motion Systems' Model 40105 Series Full/Half Step Driver – Model 40105 has been designed for easy set-up and use. Just connect a single power supply and a motor and its ready to run! Motor current is set using an on-board potentiometer. No external current setting resistors are required. This feature-packed drive provides all basic motor controls, including full or half stepping of bipolar steppers and direction control. An oscillator circuit is standard on the drive with an on-board speed control potentiometer. Features include:

Haydon 40105

  • Size: 3.75" x 2.95" x .86" (95.3 mm x 74.9 mm x 38.1 mm)
  • Power Requirement: Single unregulated, providing +24 VDC to +40 VDC
  • Output Current: Fully adjustable from 66 mA/ø to 3 A/ø
  • Chopper Frequency: ~20 Khz
  • Onboard Oscillating Range: < 10 pulses/sec. to > 2000 pulses/sec
  • Idle current reduction

Haydon Kerk Motion Systems' Model DCS4020 Series Full/Half Step Driver – The Haydon™ DCS4020 Chopper Drive delivers optimum performance throughout a greater speed range. This new technology drive has been designed for easy set up and use. The Haydon DCS4020 is ideal for development projects where a single power supply is all that is necessary to easily run the motor. The motor current is set using an on-board potentiometer and no external current setting resistors are required. The Haydon DCS4020 is also feature-packed. The Driver provides all the basic motor controls including full or half-stepping of bipolar steppers, directional control, and output enable control. An oscillator circuit is standard on the drive with its onboard potentiometer. In addition, external input/output signals allow complete remote control of all drive functions. All electrical connectors have removable plugs incorporating screw type terminals. Features include:

Haydon Kerk Half/Full Stepper Motor

  • Size: 4.47" x 3.38" x 1.31" (113.54 mm x 85.85 mm x 33.27 mm) including mating connectors
  • Power Requirement: Single unregulated, providing +24 VDC to +40 VDC
  • Output Current: Fully adjustable from 66 mA/ø to 2 A/ø
  • Continuous Rating: 2A/ø
  • Peak, non-repetitive rating: 3A/ø
  • Chopper Frequency: ~20 Khz
  • Onboard Oscillating Range: < 10 pulses/sec. to > 2000 pulses/sec

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