Scale Origin Signal Detection Type - Mitsubishi Electric MELSEC Q Series User Manual

7 OPR CONTROL

7.7 Scale Origin Signal Detection Type

Set "Need to pass motor Z phase after the power supply is switched on" in "
selection C-4" when using the OPR for scale origin signal detection type. An "error code 1100"
will occur at the start of the OPR for scale origin signal detection type, if "Not need to pass
motor Z phase after the power supply is switched on" is set.
The OPR is executed using a home position signal (zero point) on a linear scale.
The scale origin signal detection method beings deceleration upon the dog sensor
ON. Then, movement is reversed and the system detects for the linear scale's OP
signal. Once detected, the system decelerates to a stop and then returns to the
scale's OP at the set creep speed. For linear scales that have multiple home position
signals, the position of the home position signal that is nearest the proximity dog
becomes the home position. Operation outline is shown below.
(1) There is a proximity dog in the direction of OPR
1) Start the OPR.
(It starts to accelerate at the time set in"
direction set in "
" OPR speed".)
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2) The proximity dog ON is detected, and a deceleration stop is made.
3) After deceleration stop, it moves in the opposite direction against of OPR at
the OPR speed.
4) After proximity dog ON, a home position signal (zero point) on a linear scale
is detected, and a deceleration stop is made.
5) After deceleration stop, it moves in direction of OPR at the speed set in
" Creep speed", and the OPR completes at the position of home
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position signal (zero point).
V
OPR start
OP signal (Zero point)
CAUTION
OPR direction", and it moves at the speed set in
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OPR direction
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5)
1)
OP
4)
Proximity
dog
7 - 12
MELSEC-Q
Function
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OPR acceleration time" in the
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OPR speed
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2)
Creep speed
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3)
Limit switch