TMC424 Datasheet – (V1.04 / 2015-JUL-01)

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Copyright © 2011 TRINAMIC Motion Control GmbH & Co. KG

3 Application Environment

Motor

Incremental

Encoder

TMC

429

TMC

424

TMC

26x

µC

SPI-Interface

SPI-Interface

Step / Direction Interface

for up to three power stages

Motor

Incremental

Encoder

TMC

26x

Motor

Incremental

Encoder

TMC

26x

Motor

Incremental

Encoder

TMC

26x

TMC

429

TMC

424

TMC

26x

TMC

26x

µC

Motor

Incremental

Encoder

Motor

Incremental

Encoder

SPI-Interface

SPI-Interface

TMC424 as Step / Direction converter

and Incremental Encoder Interface

TMC424 as Incremental Encoder Interface

Figure 3: Application Environment

3.1 Application Description

3.1.1 Application with TMC26x Stepper Motor Driver (SPI controlled)

A complete close-loop motion control system consists of the TMC429 three-axis motion controller, a

powerful stepper motor driver from the TMC26x family and the TMC424 Encoder Interface. The system

is controlled by an inexpensive microcontroller.

The main advantage of the system is that time critical communication to the TMC26x driver is

performed by the TMC429. The main purpose of the inexpensive microcontroller is to parameterize the

TMC429 and TMC424 and to send motion parameters like maximum speed or target position to the

TMC429. Position validation is done by reading the actual position of the TMC429 and the TMC424.

The older TMC236, TMC246, TMC239 and TMC249 are also compatible with the TMC424.

3.1.2 Application with Step/Direction controlled TMC26x

Another possibility to build a close loop motion control system is to use the TMC424 as encoder

by the TMC429 into parameterizeable step and direction pulses. For parameterizing, both the TMC429

Since the TMC429 already has the capability to output Step/Direction signals for at least two motors

(depending on the package), the conversion in the TMC424 is not needed in most cases.