Mitsubishi A1SD75M1, User Manual

Page: 491 / 746

12 - 19
MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
(3) Precautions during control
It is recommended that the "movement amount per pulse (A)" be set to a value
close to "1" for the following reasons.
“1” set in the “movement amount per pulse” indicates the minimum value of
“ Pr.1 Unit setting.” (In case of [mm] unit: 0.1 [
µ
m])
"Movement amount per pulse" = "1" means the minimum value of " Pr.1 Unit
setting". (0.1 [(m] when the unit setting is [mm])
(a) If the setting of the movement amount per pulse is less than 1, the
command speed increases, and the actual speed may exceed the speed
limit value ( Pr.7 Speed limit value, Pr.32 JOG speed limit value),
causing the servomotor speed to be overspeed.
(b) If the setting of the movement amount per pulse is less than 1, the
mechanical system may vibrate.
(c) Set the movement amount per pulse that will make the command speed to
the servo amplifier not more than 1Mpps.
If the setting of the command speed to the servo amplifier is more than
1Mpp, the AD75 may operate improperly.
REMARK
In the AD75, the general term for the functions in items (a) to (c) above is defined as
the "electronic gear function". Refer to the User's Manual for the servomotor for the
definition of the "electronic gear" on the servomotor side.