Mitsubishi A1SD75M1, User Manual

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MELSEC-A
8 ZERO POINT RETURN CONTROL
8.2.8 Zero point return method (6): Data setting method
The data setting method machine zero point return is a method in which the position
reached by manual operation (JOG operation/manual pulse generator operation) is
defined as the zero point in an absolute position detection system. (The axis is not
moved in the data setting method machine zero point return.) When the data setting
method machine zero point return is executed, the current position (position reached
by manual operation) in the absolute position detection system is registered as the
zero point, and " Pr.47 Zero point address" is stored into " Md.29 Current feed value"
and " Md.30 Machine feed value".
Operation chart
1)
In the absolute position detection system, move the machine to the position desired to be registered as the
zero point by manual operation (JOG operation/manual pulse generator operation).
2) Start the machine zero point return (turns ON the positioning start signal).
3)
The absolute position of the servomotor at execution of the machine zero point return is stored as the zero
point.
4)
"
Pr.47
Zero point address" is stored into "
Md.29
Current feed value" and "
Md.30
Machine feed
value".
3) Stored as the zero point at execution of
the machine zero point return.
Machine moving range
1) Position reached by manual operation
2) Machine zero point return start
(Positioning start signal)
Fig. 8.11 Data setting method machine zero point return
Precautions
(1) The data setting method machine zero point return performed in a system that
is not an absolute position detection system has the same functions as a
current value change.
(2) Among the zero point return parameters, only the zero point address is used in
the data setting method.
Set any values within the setting ranges to the zero point return parameters
other than the zero point address.
(3) Prior to the data setting method machine zero point return after power-on,
always rotate the servomotor one or more turns by JOG operation, etc.
If the servomotor is not rotated one or more turns before the data setting
method machine zero point return, an error "zero point not pass at zero point
return" (error code: 210) occurs.
If the error has occurred, make an error reset, rotate the servomotor one or
more turns, and then perform the data setting method machine zero point
return again.