6-6 MHT258a (Engl.)
- Position control - Speed control
Auto-tuning is effective in position control and speed control, but not in torque control.
Set the following two parameters to activate the auto-tuning.
(1) Tuning method (basic para. 31)
(2) Operating speed response (basic para. 33)
■ Tuning method (basic para. 31)
Set this para. according to mechanical equipment system. In general, “auto (low stiffness)” is selected for most of mechanical equipment
system. This is a factory setting value.
Basic parameter 31
Set value Target machine
1: Auto (low stiffness) Ball-screw (with speed reducer)
Rack and pinion
Timing belt
Conveyor
Chain drive
Feed roll
Table indexing (dividing)
Spindle drive (with speed reducer)
2: Auto (high stiffness) Ball-screw (direct coupling of motor and screw)
Spindle drive (Direct coupling)
0: Manual All of the para. must be set individually.
Auto-tuning is always effective when the load inertia ratio (basic para.32) is set at 0.0. The load inertia ratio after auto-tuning is executed can
be checked in the monitor mode on the keypad panel. (Auto-tuning is invalid when basic para. is set at 0.)
Remarks : The load inertia ratio after auto-tuning will be canceled when power supply is shut down. Auto-tuning will be executed again
when power supply is on.
To save the resultant load inertia ratio, set the load inertia ratio (basic para. 32) so that it can be monitored on the keypad panel.
(in monitor mode [
])
■ Adjustment of response rate (basic para. 33)
Motor’s response rate can be adjusted by setting the operating speed response (basic para. 33).
Basic parameter 33
Para. Name Setting range Initial value Change
33 Operating speed response 10 to 1000Hz (in 1Hz steps) 100 Always
Use the motor with the initial value of 100Hz in ordinary mechanical equipment system. The higher is the setting value, the quicker is the
motor’s response rate. If the setting value is too high, vibration may be generated depending on the mechanical equipment system.
Mechanical equipment system having direct-coupled ball-screw can have a higher setting value (higher response rate as well).
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