Encoder Orientation Gear Ratio Setting - Mitsubishi Electric FR-A5AP Instruction Manual

6.5.4

Encoder orientation gear ratio setting

Use the following parameters to set the encoder orientation gear ratio.
• Pr. 394 "number of machine side gear teeth" (factory setting: 1)
• Pr. 395 "number of motor side gear teeth" (factory setting: 1)
Make sure that the above parameter values are factory settings.
An accurate gear ratio (or pulley ratio) from the motor shaft to the spindle is necessary.
Confirm that the numbers of gear teeth set in Pr. 394 and
Pr. 395 are correct.
Pr.394 = A x C x E
Pr.395 = B x D x F
Exercise care so that the A x C x E and B x D x F settings
do not exceed 32767. If either or both of them exceed
that value, make approximations.
REMARKS
Pulley ratio ..... Ratio of vector-driven motor side pulley diameter to spindle side
pulley diameter
Setting example (When the numbers of gear teeth are as follows)
A : 15, C : 43, E : 60, B : 10, D : 28, F : 55
Pr.394 = 15 x 43 x 60 = 38700
Pr.395 = 10 x 28 x 55 = 15400
Since the Pr. 394 setting exceeds 32767 at this time, make approximations as follows.
Pr.391 38700
Pr.392 15400
3870
1540
77
ORIENTATION CONTROL AT A MACHINE END— V500
Spindle
(A to F indicate the numbers
of gear teeth.)
A
pindle side
A
B
C
D E
F Motor
A
B
B
Motor side