ElmoMC SimplIQ Digital Servo Drives-Bell Getting Started - Manual (Page 54)

The SimplIQ for Steppers Getting Started & Tuning and Commissioning Guide
MAN-BELGS (Ver. 1.1)
54
New
Open
Save
Cleanup
Figure 51: Identification file maintenance options
You can reset the identification process (New) and store results (Save).
You can also edit existing identification results.
You can add frequency points to an existing identification. Open an existing
file, then add the frequencies you want (further details appear later in this
manual). This means that if you want to add data in a certain frequency region
you do not need to go through the entire identification process.
You can clean outliers from frequency responses (Cleanup) – deleting an
identified frequency which you consider unreliable
4.2.3 Identification Work Point
Identification is the art of exciting the plant with signals, so that its response will
reveal the most about its nature.
The Conductor identifies frequency responses, thus it naturally selects sinusoidal
excitation. Applying pure sinusoidal excitation in an open loop may not be such
a good idea – the motor may drift away and high frequency data may be
completely obscured by frictions.
The Conductor uses the "Starting Step" controller to set the plant working point;
at this working point it applies the sinusoidal exciting signals.
You need to help the Conductor in selecting the identification work-point, from
the following options:
Stay in place: The start step controllers hold the motor more or less in a fixed
position. The motor will hardly drift; the identification will suffer from
frictions.