SD20-G Series
254
7.2 Inertia Identification
After motor is connected to mechanical equipment or motor is installed in load simulator, servo drive
needs to “study” the rotational inertia of current equipment before test running for normal production. It
is convenient for user to adjust related parameters, and make the servo system run in proper rotational
inertia.
Load inertia ratio=(the total rotational inertia of mechanical load )/(the rotational inertia of motor
itself)
Load inertia ratio is important parameter of servo system. Set the load inertia ratio correctly is helpful for
finishing the debug rapidly. Load inertia ratio can be set either manually or by inertia automatic
identification.
Servo drive provides two kinds of inertia identification methods:
1)
Offline Inertia Identification
Use “rotational inertia identification function (Po008)”, operate the keys of servo drive to realize
inertia identification;
2)
Online Inertia Identification
Servo drive identifies current load inertia automatically according to the load condition, the
identified value writes to “rotational inertia ratio (Po013)”.
1. If actual load inertia ratio is big and the drive gain is low, motor will be slow and cannot meet the
requirements; user can increase the rigidity by Po010 to learn the inertia again;
2. If vibration occurs in the process of inertia learning, user should stop inertia learning
Immediate and lower the gain;
7.2.1 Offline Inertia Identification
Servo drive can drive the load running by servo motor according to forward/reverse curve to calculate the
rotational inertia ratio of load and confirm the rotational inertia.
Before running offline inertia identification, confirm the content below firstly:
1)
The movable distance of motor should satisfy one requirement
Before offline inertia identification, make sure the limit switch is installed in machinery, and ensure that
motor has the movable distance of over 1 cycle for each forward and reverse to prevent accident from
over-distance in the process of inertia identification; Check the movable distance in the stop position of
Содержание SD20-G Series
Страница 35: ...SD20 G Series 35 M3 structure Fig 3 1 5 Servo drive structure 3...
Страница 36: ...SD20 G Series 36 ML3 structure 118 5 5 7 5 93 297 8 223 118 93 0 5 12 5 7 5 4 M4...
Страница 38: ...SD20 G Series 38 M4 structure Approx mass 10 365 kg Fig 3 1 7 Servo drive structure 5...
Страница 39: ...SD20 G Series 39 M5 structure Approx msaa 11 1Kg Fig 3 1 8 Servo drive structure 6...
Страница 40: ...SD20 G Series 40 M6 structure Approx mass 17 4Kg Fig 3 1 9 Servo drive structure 7...
Страница 182: ...SD20 G Series 182 Fig 6 4 44SD20E Cam internal frameworkdiagram...
