Mitsubishi Electric MELDAS C6 Instruction Manual page 369

(b) Automatic initialization
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4. Absolute Position Detection System
4.3 Starting Up the Absolute Position Detection System
With this method, the axis is pushed against the machine end stopper, and can be used
when the "INIT-SET" mode is selected. This method has the following features compared to
the manual initialization method.
• The axis is pushed with the same conditions (feedrate, distance) each time, so
inconsistencies in the zero point position can be reduced.
• Part of the operations is automated to simplify the zero point initialization.
Set the following parameters before initializing the zero point.
(Refer to the Appendices for details.)
#2054 clpush : Current limit
#2055 pushf : Pushing speed
#2056 aproch : Approach point
[Operation procedure/operation]
Operation procedure
1) Select the ABS POSITION SET screen.
2) Select the "INIT-SET" mode.
3) Check that the stopper method is applied for the axis for
which the zero point is to be initialized.
("TYPE" on the ABS POSITION SET screen is STOPPER .)
4) Set "1" for "#0 INIT. SET" of the axis for which the zero
point is to be initialized.
5) Set "#2 ZERO".
6) Start the axis for which the zero point is to be initialized
with JOG.
• JOG can be started only in the "#2 ZERO" sign direction
(machine end stopper direction). (If the JOG start direction
is illegal, a message will appear.)
a) The axis will move at the "pushing speed" in the
machine end stopper direction.
b) When the axis pushes against the machine end stopper
and the current limit is reached continuously for a set
time, the axis will return toward the approach point at
the "pushing speed".
c) After reaching the approach point, the axis will move in
the machine end stopper direction at the "pushing
speed".
d) When the axis pushes against the machine end stopper
and the current limit is reached continuously for a set
time, the axis will return to the previous grid at the
"pushing speed".
e) When the previous grid is reached, the movement will
automatically stop.
• The basic machine coordinate system will be
automatically set.
The absolute position is established at this stage.
8) This completes the zero point initialization.
Initialize all axes and then turn the power ON again.
9) Output the parameters.
When changing only the basic machine coordinate zero point, carry out steps 4) and 5)
above and then turn the power OFF and ON.
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III - 20
"STATE" display
•
when absolute
NG
position has been lost
•
when absolute
OK
position has been
established
JOG-START
STOPPER 1
ZP-RTN
STOPPER 2
ORIG-RTN
OK