Rexroth Indramat CLM1.4, Manual, Page: 99 / 274

7-2
Functions CLM01.4-LAP-01VRS
DOK-CONTRL-CLM01.4LAP1-FK01-EN-P
Pertinent Parameters
•
Ax00, Application Type:
•
Ax31, Measuring wheel operating mode.
•
Ax16, Encoder difference monitoring
•
C000, Encoder Data of the Master Encoder 1
•
C001, Encoder Type of the Master Encoder 1
•
C002, Feed Constant of the Master Encoder 1
•
C003, Offset of Master Encoder 1
Functioning
Repositioning is always controlled by the servo drive in Manual Mode. In
Automatic Mode, repositioning is controlled by the measuring wheel
encoder. If an input is defined (see Parameter Ax31), the user can switch
between measuring wheel encoder and motor encoder at any time in
Automatic Mode.
Repositioning by measuring wheel can be activated only if the following
three conditions are met:
•
The material is in feed rollers and under the measuring wheel.
•
The feed rollers are closed.
•
The measuring wheel encoder is pressed against the material.
If one of the previous conditions is not met, the drive can temporarily run
on until it is stopped by error detection within the control. The following
two error messages can be shown:
•
Encoder Error
•
Drive Runaway
If position loop reset is required in conjunction with ‘measuring wheel
mode,’ the ‘measuring wheel mode’ signal must be removed via the signal
input while resetting the position loop. Care must be taken not to exceed
switching times.
For length measurements with a measuring wheel, the following two
options are available:
•
Option 1) The position loop is closed via the measuring wheel encoder
when measuring wheel operating mode is active. The motor encoder
is only used for monitoring. Disadvantage: When mechanical
construction is unstable, this system is susceptible to variances.
•
Option 2) The position loop is closed via the motor encoder. The
position difference between the motor encoder and the measuring
wheel encoder is added to the current movement as a correction.
When construction is unstable, only the correction value varies. The
correction is disabled as soon as the motor reaches the switching
threshold defined in Parameter Ax27. The position differences that
occur after disabling the correction are compiled and added to the next
movement. Activation occurs via Parameter Ax00.
Note: Option 2 is not appropriate for exact positioning (depending on
Parameter Ax27, Switching Threshold), because of premature disabling
of the correction function.