IDX 7505 Manual (V1.17 / 2011-APR-11)
17
Copyright © 2011, TRINAMIC Motion Control GmbH & Co. KG
6
Getting started
6.1
Motor
Attention:
˗
Do not connect or disconnect the motor while power on. Damage to the module may occur.
˗
A too high motor current setting can damage you motor! If in doubt, start with a low current setting
and check motor temperature.
˗
If the motor heats up very quickly, check all settings. The motor shall never reach a temperature above
100°C under any circumstances.
˗
Some stepper motors need contact to metallic parts to allow continuous operation. Mind the default
settings, when you operate in step/direction mode the first time! (You can store your own settings in
the module permanently.)
6.1.1
Motor choice
Care has to be taken concerning the selection of motor and supply voltage. In the different chopper
modes different criteria apply.
Attention:
Modes 0 and 1 are quite insensitive to the motor choice, while mode 2 is very sensitive, because it
uses a different motor current regulation scheme.
This chapter gives some mathematical information on the motor choice, but you can skip it if you
want to experiment with a given motor. Normally, best results will be achieved when operating the
given motor in a range of 50 to 100% of nominal motor current (see motor data sheet).
Mode 2 and mode 1 are mainly intended for slow, smooth and very exact movements, due to the
high micro stepping resolution. For most dynamic operation choose mode 0 or the combined modes
3 and 4 which use mode 1 or 2 for slow movements and switch to mode 0 at a defined velocity.
6.1.1.1
Motor velocity
Whenever it is desired to maximize the motor velocity in a given application, it is important to
understand limitations due to supply voltage and motor inductivity. Please consult your motor data
sheet for this, as well as the choice of the chopper mode. Chopper mode 0 allows maximum motor
velocity.
