TMC423_1 TRINAMIC [TRINAMIC Motion Control GmbH & Co. KG.], TMC423_1 Datasheet - Page 9

• Manufacturer Part Number: TMC423_1
• Description: Serial Triple Incremental Encoder Interface
• Manufacturer: TRINAMIC [TRINAMIC Motion Control GmbH & Co. KG.]

TMC423 Data Sheet – (V1.13 / June 20
3 Application Environment
3.1
3.1.1
A complete close-loop motion control system consists of the TMC428 three-axis motion controller, the
powerful TMC236 stepper motor driver and the TMC423 Encoder Interface. The system is controlled by
an inexpensive microcontroller.
The main advantage of the system is that time critical communication to the TMC236 driver is
performed by the TMC428. The main purpose of the inexpensive microcontroller is to parameterize the
TMC428 and TMC423 and to send motion parameters like maximum speed or target position to the
TMC428. Position validation is done by reading the actual position of the TMC428 and the TMC423.
3.1.2
Another possibility to built a close loop motion control system is to use the TMC423 as encoder
interface and also as a step direction converter. Thereto the TMC423 converts the SPI
sent by the TMC428 into parameterizeable step and direction pulses. For parameterizing both the
TMC428 and TMC423 have to be connected via SPI
Copyright © 2004 TRINAMIC Motion Control GmbH & Co. KG
Application Description
Application with TMC236 Stepper Motor Driver
Application with Step / Direction Power Stage
TMC423 as Incremental Encoder Interface
SPI-Interface
TMC
TMC
TMC
236
236
236
TMC
428
Motor
Motor
Motor
SPI-Interface
Figure 3: Application Environment
µC
Incremental
Incremental
Incremental
th
Encoder
Encoder
Encoder
, 2007)
TMC
423
TM
interface to an inexpensive microcontroller.
TMC423 as Step / Direction converter
and Incremental Encoder Interface
for up to three power stages
Step / Direction Interface
Power
Power
Power
Stage
Stage
Stage
Step/
Step/
Step/
Dir
Dir
Dir
TMC
428
SPI-Interface
µC
Motor
Motor
Motor
TMC
423
SPI-Interface
Incremental
Incremental
Incremental
Encoder
Encoder
Encoder
TM
datagrams
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