SMCI32 - Steppermotor Driver with Controller

The stepper driver SMCI32 is an extremely compact and cost-effective constant current power end stage with integrated Closed-Loop positioning or speed control.
Due to the great capacity and functions available, it offers designers and developers a rapid and simple method of resolving numerous drive requirements with less programming effort. It is used for controlling standard stepper motors (including with attached encoders) or motors with integrated encoders or brakes. The following operating modes can be selected:

• Positioning
• Speed
• Flag positioning
• Clock direction
• Analogue or joystick operation (±10 V)

The operating behaviour of the motor can be set and optimised according to individual requirements by setting the motor-related parameters such as phase current (selectable in 1% increments), step resolution (from 1.8° - 0.014°), as well as the adaptive microstep (automatic adaption of step width). Machine-related parameters can be set using the NANOPRO software and significantly reduce commissioning time:

• Distance in steps, degrees or mm
• Speed in Hertz, rpm or mm/s
• Feed constant in mm/revolution
• Gear reduction with reverse clearance

Three adjustable reference modes (external and internal) enable automatic machine settings, whereby external reference switches may be inapplicable if there is a shift < 360° possibly due to the index signal of the internal encoder. Even if stepper motors do not lose steps during normal operation, the integrated speed control provides additional security in all operating modes, e.g. against motor stalling or other external sources of error. The monitoring function detects a stalled motor or step loss after half a step at the most (for 1.8° stepper motors).
Automatic error correction is possible after the drive profile is ended or during the drive.