Mitsubishi Electric C70 Setup Manual page 144

(9) --- Axis movement in the automatic initialization ---
(a) The axis will move at the "pushing speed" in the machine end stopper
direction.
(b) When the axis is pushed against the machine end stopper and the current
reaches the current limit value, the axis will return toward the approach point at the
"pushing speed".
(c) Having reached the approach point, the axis moves toward the machine end
stopper at the "pushing speed".
(d) When the axis is pushed against the machine end stopper and the current
reaches the current limit value, the axis will return toward the adjacent grid at the
"pushing speed".
(e) When the adjacent grid is reached, the movement will automatically stop.
Then the absolute position is established and basic machine coordinate system is automatically set.
(10) Carry out the absolute position initialization set for all the axes, and then turn the power ON again.
When changing only the basic machine coordinate zero point, carry out steps (7) and (8) above and then turn the
power OFF and ON.
(Note 1) Smoothing is turned OFF (step feed is applied) for the acceleration/deceleration during movement at the
pushing speed.
(Note 2) If "0" is set for the absolute position parameter "#2056 aproch", the reference position will be the approach
point.
(Note 3) The automatic initialization will stop in the following cases after starting. "STATE" will change to JOG START
when the initialization has stopped (or when the "INIT-SET" has been selected at the mode change). Start the
operation from step (8).
- When a new absolute position detection alarm has occurred
- When READY has been turned OFF
- When the mode has been changed
- When reset is executed
If the "STATE" has shown OK before the automatic initialization, turn the power ON again without resuming
the operation from (8). The "STATE" will return to OK.
(Note 4) At the step (9) (e), if the first grid point is on the grid mask ("#2028 grmask"), the axis will stop at the next grid
point. Note that the zero point shift ("#2027 G28sft") is invalid.
(Note 5) Automatic initialization cannot be started in the following cases. The message "T01 CAN'T CYCLE ST" will
appear if starting is attempted.
- When "#0 INIT. SET" has not been set.
- When the "#2 ZERO" setting is inappropriate.
- When "#2055 pushf" has not been set on the [ABS. POSI PARAM] screen.
- When "Z71 Detector Error 0005" has occurred.
In the above cases, the inappropriate "#2 ZERO" setting means the inappropriate relation of "#2 ZERO" and
"#2037 G53ofs". In other words, if the value of "#2 ZERO" is smaller than that of "#2037 G53ofs", the machine
end stopper will be located between the basic machine coordinate system zero point and the reference
position, so automatic initialization cannot be started. If "#2 ZERO" is set to "0", the machine end stopper
direction will not be set, so automatic initialization cannot be started, either. (Refer to the following diagram)
Basic machine coordinate
system zero point
#2 "ZERO"
Reference position return parameter
#2037 G53ofs
Cannot execute the reference position return
because the reference position will be set
over the machine end stopper from basic
machine coordinate zero point.
7.3 Adjustment in Absolute Position Detection System
Movement
Reference position
Machine end
stopper (Mechanical
basic position)
STATE display
STOPPER 1
ZP-RTN
STOPPER 2
OK
ORIG-RTN
Machine end stopper
(Mechanical basic position)
Basic machine coordinate
system zero point
When "ZERO" is set to "0", the pushing direction
cannot be set because the machine end stopper
will be positioned at the basic machine coordinate
system zero point.
C70 Setup Manual
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