Positioning To The Zero Point - Mitsubishi Electric A1SD75P1-S3 User Manual

8 ZERO POINT RETURN CONTROL

8.4 Positioning to the zero point

Positioning to the zero point is explained in this section.
To carry out positioning to the zero point, "1-axis linear control (ABS) positioning data"
is created in which the " Md.43 Zero point absolute position" is set in the positioning
address ( Da.5 ). In this case, the other positioning data items are set beforehand in
the flash ROM. (This control is called a "high-speed machine zero point return".)
Setting item
Operation pattern
Da.1
Control method
Da.2
Acceleration time No.
Da.3
Deceleration time No.
Da.4
Positioning address/
Da.5
movement amount
Arc address
Da.6
Command speed
Da.7
Dwell time
Da.8
M code
Da.9
* Refer to section "5.3 List of positioning data" for information on the setting details.
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Restrictions
The "zero point absolute position overflow/underflow flags" ( Md.40 Status:
b11/b12) must be turned OFF.
Positioning data setting example
The following table shows setting examples in which "zero point positioning" is set
in the positioning data No. 100 of axis 1.
Setting
example
Positioning
Set "Positioning complete" so the next positioning data is not executed.
complete
ABS linear 1 Set the absolute system 1-axis linear control.
Designate the value set in " Pr.8 Acceleration time 0" as the
0
acceleration time at start.
Designate the value set in " Pr.9 Deceleration time 0" as the
0
deceleration time at deceleration.
Set " Md.43 Zero point absolute position" in the positioning address.
(Assuming that the " Pr.1 Unit setting" is set to "mm".)
– Setting not required. (Setting value will be ignored.)
20.00mm/min Set the speed when moving to the positioning address.
Set the time from the positioning stop (pulse output stop) to the output
500ms
of the positioning complete signal.
Set when carrying out other auxiliary operation commands in
0
combination with the No. 1 positioning data
Setting details
8 - 22
MELSEC-A