53 FSCUT2000C laser cutting control system User Manual
Chapter 5 Motion effect optimization
5.1 Infer inertia ratio and machine characteristics
Machine inertia ratio is a key indicator we measure the machine characteristics.
Using Servo Tools of Friendess, we can very easily calculate the inertia ratio of the
machine for each axis. Servo Tools can be downloaded in http://downloads.fscut.com/.
As shown below:
When inertia ratio is less than 200 percent, the device is light loaded, and enables
high-speed cutting.
When inertia ratio is greater than 200% but less than 300 percent, the device is
medium loaded, lose some precision during high-speed cutting, and need to
appropriately reduce processing acceleration and FIR frequency.
When inertia ratio is greater than 300% but less than 500 percent, the device is
overloaded, unable to achieve high-speed cutting.
When inertia ratio is greater than 500%, there are serious design flaws, servo is
difficult to complete setting in a short time.
The maximum supported machine cutting speed, the maximum air shift speed,
and the maximum acceleration can also be simply calculated by Servo Tools. These
three parameters can be directly applied to control parameters in the software.
Experienced users can also accurately calculate the inertia ratio through testing
software coming with servo.
Notes: the servo parameters calculated by Servo Tool is only used for the
closed-loop card. Users of open-loop card, please set servo parameters based on
position mode.
5.2 Servo gain adjustment
5.2.1 Basic requirement
First, debuggers should be familiar with servo and can use professional servo
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