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Build more efficient stepper motor control subsystem

Posted: 22 Nov 2010     Print Version  Bookmark and Share

Keywords:digital control  microstepping  integrated power IC 

Contemporary stepper motor drive systems typically use an integrated power IC that drives the motor and may integrate some simple controls like the current control. More advanced control ICs also integrate a state machine to control the stepping sequence for the motor. Generally, the step timing and the motion profile are controlled by an external microcontroller or dedicated logic in an ASIC.

For multiple motor controls, either the dedicated logic is replicated for each motor or the microcontroller has additional software loading for each motor being controlled.

A new IC simplifies the implementation of multiple motor controls by integrating a digital control core with the driver IC. Working in voltage mode, the IC is able to manage user-defined movement profiles at up to 1/128 microstepping with minimal loading on the main microcontroller.

View the PDF document for more information.

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