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NI SMD-7613/7614/7615/7616 User Manual
Configuring the Drive
The drive is configured with the NI Stepper Configuration Utility, available at
ni.com/
downloads
. When you have located your device with the utility, you can configure various
aspects of the motor performance and control for your application.
Motor
From the NI Stepper Configuration Utility home screen, click the
Motor
icon to open the
configuration window.
Figure 38.
NI Stepper Configuration Utility Configuration Window
The drive works best with the specially matched motors selectable from the Standard Motor list.
Select the motor you will use and configure the following settings:
Running Current
Set the Running Current to 100% to achieve maximum torque. However, under some conditions
you might want to reduce the current to save power or lower motor temperature. This is
important if the motor is not mounted to a surface that will help it conduct heat away or if you
expect the ambient temperature to be high.
Step motors produce torque in direct proportion to current, but the amount of heat generated
is roughly proportional to the square of the current. If you operate the motor at 90% of rated
current, the motor provides 90% of the rated torque and approximately 81% as much heat.
At 70% current, the torque is reduced to 70% and the heating to about 50%.
