Parameter Related To Orientation Control; Encoder Orientation Gear Ratio Setting - Mitsubishi Electric 800 Series Instruction Manual

5.4

Parameter related to orientation control

5.4.1

Encoder orientation gear ratio setting

Set the encoder orientation gear ratio for machine end orientation control.
To perform machine end orientation control, the FR-A8TP and the plug-in option FR-A8AP must be installed.
Set "1" in Pr.862 Encoder option selection. Connect the motor-end encoder to the FR-A8TP, and connect the machine-end
encoder to the FR-A8AP.
Pr.
Pr.
group
Number of machine side
394 A540
gear teeth
Number of motor side
395 A841
gear teeth
Set the encoder orientation gear ratio.
• An accurate gear ratio (or pulley ratio) from the motor shaft to the spindle is necessary.
Set correct numbers of gear teeth in Pr.394 and Pr.395.
Pr.394 = A  C  E
Pr.395 = B  D  F
Exercise care so that the A  C  E and B  D  F settings do not exceed 32767.
If either or both of them exceed that value, make approximations.
NOTE
• Pulley ratio ...... Ratio of vector-driven motor side pulley diameter to spindle side
pulley diameter
46
ORIENTATION CONTROL
Initial
Name
value
1
Setting
range
0 to 32767 Set the encoder orientation gear ratio.
Description
Spindle
A
B
C
D E
(A to F indicate the
F
numbers of gear teeth.)
A B
Spindle side Motor side
Motor
A
B