Home Position Shift Function - Mitsubishi Electric RD77MS2 User Manual

Home position shift function

When a machine home position return is carried out, the home position is normally established using the near-point dog and
zero signal. However, by using the home position shift function, the machine can be moved a designated movement amount
from the position where the zero signal was detected. A mechanically established home position can then be interpreted at
that point.
Control details
The following drawing shows the operation of the home position shift function.
[Pr.44] Home position return direction
[Pr.46] Home position
return speed
Machine home
position return start
Near-point dog
Zero signal
Setting range for the home position shift amount
Set the home position shift amount within the range from the detected zero signal to the upper/lower limit switches.
Setting range of
the negative
home position
shift amount
Address
decrease
direction
Lower limit switch
Zero signal
Setting range of the positive home position shift amount
Address
increase
direction
Near-point dog
[Pr.44] Home position return direction
Speed selected by the "[Pr.56] Speed
designation during home position shift"
[Pr.47] Creep speed
[Pr.53] Home position shift amount
Upper limit switch
8.2 Sub Functions Specifically for Machine Home Position Return
8 CONTROL SUB FUNCTIONS
8
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