IDX Manual (V1.15 / September 26
th
, 2008)
29
Copyright © 2005-2008, TRINAMIC Motion Control GmbH & Co. KG
5.12
Option: Pseudo DC-Motor mode (not supported by
software yet)
The velocity of the motor in this mode is
changed through a constant voltage at the
General Purpose input. The operational
voltage is 7...48V. This option may be
available in a future firmware version.
5.12.1
Setting up the module
It is advised to connect an external voltage
divider to the GPI pin, as depicted.
Figure 5.12: GPI wiring scheme
However, there are two free places for 0805 SMD resistors to be equipped directly on the module IDX.
To enable this mode solder use resistors as follows:
Attention:
Do not try to make changes on the board until you are absolutely sure.
be absolutely sure before
making changes on board:
+V
S
GND
R = 120k
R = 2.2k
GPI
7V...V
S
ATM
168
IC
IC
D
D
D
T
T
T
IC
connector RM 3.5
mounting hole
free Pads for 2.2k and 120k
Figure 5.13: Layout Changes for DC-Motor option
5.12.2
Parameterizing with RS485
First set Parameters for minimum voltage, maximum voltage and a zero point in between. Other
values can be changed also like max. acceleration, max. velocity, microsteps,…
Before enabling this mode
with the RS485 command
…
connect a voltage of 7…48V to General Purpose
Input (GPI). The voltage has to exceed zero point voltage before the regulation works.
5.12.3
Motion Control
Change the voltage at GPI between 7…48V. The motor will accelerate and decelerate relative to the
specified zero point. Additional parameters like resolutions of microsteps can be stored in the
EEPROM.
