Using A Linear Servo Motor; Functions And Configuration - Mitsubishi Electric MELSERVO-J3W Series Instruction Manual

13. USING A LINEAR SERVO MOTOR

13. USING A LINEAR SERVO MOTOR
WARNING

13.1 Functions and configuration

13.1.1 Summary
In fields of semiconductor and liquid crystal related equipment, installed machine, etc. with strong demands for
high accuracy, high-speed and high efficiency, the system using the linear servo motor for drive shaft is
increasing. Since the linear servo system can obtain the characteristics of the high-speed and the high
acceleration/deceleration greater than the ball screw drive system, and does not have a ball screw wear which is
a weak point in the ball screw drive system, it can extend the life of the equipments. In addition, a response error
does not occur and so the high accuracy system can be established.
The following shows the differences between the linear servo motor and the rotating servo motor.
Classification
External I/O signal Stroke limit input signal
(FLS, RLS)
Motor pole Magnetic pole detection
adjustment operation
Home position Home position reference
return position
Absolute position Battery for absolute position
detection system encoder
(MR-J3BAT)
When using the linear servo motor, read the following descriptions in the SSCNET
Interface Linear Servo MR-J3- B-RJ004 INSTRUCTION MANUAL
(SH(NA)030054).
Safety Instructions
Handling of Linear Servo Motor
2. LINEAR SERVO MOTOR
9. CHARACTERISTICS
Item
Linear servo motor
Required (when
magnetic pole is
detected)
Required
1048576 pluses unit
(factory setting)
Not required
Differences
Rotating servo motor
Not required
Not required (adjusted
at shipment)
Servo motor 1 rotation
unit
Required
13 - 1
Remarks
Automatically turns ON in the
parameter setting.
Automatically executed at the first
servo-on after turning the power on.
For the absolute position linear
encoder, the magnetic polarity
detection can be made invalid in
the setting of parameter No.PS01.
(Refer to section 13.5.2 (2)(a).)
The home position pitch can be
changed in the parameter settings.
(Refer to section 13.5.2.)
The following alarm/warning is not
detected.
Absolute position erase (25.1)
Battery cable disconnection
warning (92.1)
Battery warning (9F.1)
Absolute position counter
warning (E3. )