Mitsubishi Melservo-J2-Super series Instruction Manual page 61

4. OPERATION AND FUNCTIONS
4.1.6 Confirmation of full closed encoder position data
Check the full closed encoder mounting and parameter settings for any problems.
[Check items]
When checking the following items, the full closed control mode must be selected by setting parameter
No. 62 and No. 67.
For the control mode setting, refer to "4.1.2 Selection of full closed function".
No.
1 Read of full closed encoder position data
2 Read of full closed encoder scale home position
(reference mark, Z phase)
3 Confirmation of full closed encoder feedback
direction
(Setting of full closed encoder polarity)
4 Setting of full closed electronic gear
POINT
Depending on the check items, the MR Configurator may be used.
Refer to "4.6 About Setup" for the data displayed on the MR Configurator.
Check Item Checking Method/Description
With the full closed encoder in a normal state (mounting,
connection, etc.), the cumulative feedback pulse 2 (full closed
encoder side) value is counted normally when the full closed
encoder is moved.
With the scale home position (reference mark, Z phase) of
the full closed encoder in a normal state (mounting,
connection, etc.), the within-full-one-revolution position (full
closed encoder side) value is cleared to 0 when the scale
home position (reference mark, Z phase) is passed through
by moving the full closed encoder.
Confirm the full closed encoder feedback direction at the
within-full-one-revolution position (full closed encoder side) by
moving the device (full closed encoder) manually in a servo
off state.
When the servo motor and full closed encoder feedback
directions match, running the servo motor in the CCW
direction (counterclockwise as viewed from the shaft end)
increases the within-full-one-revolution position (full closed
encoder side), and running the servo motor in the CW
direction (clockwise as viewed from the shaft end) decreases
the within-full-one-revolution position (full closed encoder side).
When the servo motor and full closed encoder directions do
not match, operation is performed oppositely.
When the servo motor and full closed encoders operate
synchronously, the cumulative feedback pulse (motor encoder
side) and cumulative feedback pulse 2 (full closed encoder
side) values increase in accordance with the setting ratio of
the full closed electronic gear (FCM/FCD).
[Confirmation example]
When the servo motor is directly coupled with a ballscrew and the
linear scale resolution is 1.0 m
Motor encoder resolution
4.0mm
Ballscrew lead
Linear scale resolution
When the movement is equivalent to one servo motor revolution
(machine end 4.0mm)
Cumulative feedback pulse 2 (full closed encoder side)
4 - 6
131072pullse/rev
1.0 m
4000 pulses