Control - National Instruments ISM-7413 User Manual

Ethernet integrated stepper

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Idle Current/Idle Current Delay

You can reduce motor heating and power consumption by lowering the motor current when it is

not moving. The NI ISM-7413 automatically lowers the motor current when it is idle for longer

than the time specified by Idle Current Delay.

The default 50% idle current setting lowers the holding torque to 50% of the specified Running

Current, which is enough to prevent the load from moving in most applications. You can adjust

this value to account for your load and heating requirements.

Load Inertia

The NI ISM-7413 includes anti-resonance and electronic damping features which greatly

improve motor performance. To perform optimally, the drive must understand the

electromechanical characteristics of the motor and load. Most of this is completed automatically

in the factory during motor and drive assembly. To further enhance performance, you must

specify the innertia of the load. If you are unsure of this value, you can experimentally find an

acceptable value by entering a multiplier of the rotor inertia.

Control

From the NI Stepper Configuration Utility home screen, click the Motion icon to open the

Motion Control Mode Window. Select the Pulse & Direction Mode button to configure the

following settings:

Figure 25. NI Stepper Configuration Utility Configuration Window

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