Torque Limit Changing Dog Type Homing - Mitsubishi Electric MR-JE-*C Instruction Manual

12. WHEN USING WITH A GENERAL-PURPOSE INTERFACE

12.4.3 Torque limit changing dog type homing

This is a home position return method using an external limit. Deceleration starts at the external limit
detection. The position specified by the first Z-phase signal, or the position of the first Z-phase signal shifted
by the specified home position shift distance is used as the home position.
(1) Device/parameter
Set input devices and parameters as follows:
Item
Homing mode selection
Home position return
direction
Home position return speed
Creep speed
Home position shift distance
Acceleration time constant/
Deceleration time constant
Station home position shift
distance (Note 1, 2)
Note 1. The setting of the station home position shift distance is disabled at home position return. Cycling the power will enable the
setting.
2. [Pr. PT40] is enabled as an offset to the position that the home position return is performed. If a larger value than the in-
position range is set to [Pr. PT40], the completion output of positioning will not turn on (short circuit) at the first power on after
home position return.
POINT
Torque limit changing dog type homing can be used only in the indexer method.
Device/parameter to be used
MD0 (Operation mode selection 1)
MD1 (Operation mode selection 2)
[Pr. PT45 Home position return types]
[Pr. PT05 Home position return speed]
[Pr. PT06 Creep speed]
[Pr. PT07 Home position shift distance], [Pr.
PT57 Home position shift distance (extension
parameter)]
RT (Second acceleration/deceleration
selection)
[Pr. PT40 Station home position shift distance] Set a shift distance of the station home position
Switch off MD0.
Switch off MD1.
Select the homing direction with [Pr. PT45]. The
setting is shown as follows:
Address increasing direction: -1
Address decreasing direction: -33
Set the rotation speed specified until an external limit
is detected.
Set the rotation speed specified after an external limit
is detected.
Set this item to shift the home position, which is
specified by the first Z-phase signal after the external
limit is detected.
1. When RT is turned off
Acceleration time constant: setting value of [Pr.
PC01 Acceleration time constant 1]
Deceleration time constant: setting value of [Pr.
PC02 Deceleration time constant 1]
2. When RT is turned on
Acceleration time constant: setting value of [Pr.
PC30 Acceleration time constant 2]
Deceleration time constant: setting value of [Pr.
PC31 Deceleration time constant 2]
(station No. 0) for the home position return completion.
12 - 25
Setting