Load Encoder Gear Function - ABB ACSM1 Manual

Load encoder gear function

Positioning uses the measured speed and position of the load. The load encoder
gear function calculates the actual load position on the basis of the measured motor
shaft position.
Load encoder gear application examples:
Positioning uses the measured
speed and position of the load. If no
encoder is mounted on the load
side, the load encoder gear function
must be applied in order to calcu-
late the actual load position on the
basis of the measured motor shaft
position.
This configuration also works with
the estimated position besides en-
coder 1.
A second encoder (encoder 2)
mounted on the load side is used as
the source for the actual position
value. (Note: Inverted gear ratio is
considered when the position con-
trol output (speed reference) is pro-
duced).
If the second encoder is an abso-
lute encoder, it must be configured
as encoder 1.
This configuration does not work
with the estimated position besides
encoder 1 because the motor gear
ratio is internally set to 1:1 with the
estimated speed.
The load encoder gear parameters
GEAR DIV are set as follows:
60.03 LOAD GEAR MUL
60.04 LOAD GEAR DIV
Note: The sign of the programmed gear ratio has to match the sign of the
mechanical gear ratio.
ENCODER 1 MOTOR
3~
60.03 LOAD GEAR MUL
Load speed
=
Encoder 1/2 speed
M
3~
GEAR LOAD
M
and 60.04 LOAD
Drive control and features
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