— 10-2 —
10.2. Home Return
l
Be sure to perform the home return at all times except when user’s controller is performing
coordinate system control. The origin cannot be determined unless the home return is performed.
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The positioning and software overtravel limits are set in the position scale determined by the
home return operation.
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The origin of the position scale is set to the point at where the home return completes.
!
Caution : Position data disappears after the power is turned off, so perform the
home return each time you turn on the Driver Unit power.
Figure 10-2: Home Return sequence
SVON input
Start
HLS input
Motor movement
øZ
IPOS output (FW
¹
0)
IPOS output (FW=0)
MNS direction
PLS direction
HOS input
or RUN input for
channel with HS
command programmed.
*
(4)
(3)
(2)
(1)
ON
OFF
30ms min.
Close
Open
Close
Open
ON
OFF
ON
OFF
H
S
CR
HA
CR stands for the carriage return
code (0D
H
)
10ms min.
HO
HZ
When
HO
¹
0
HV
FW value
RS-232C
communication
command
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Make the Motor Servo-on. (SVON input on)
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Turning the HOS input ON will start the home return. (1)
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The Motor moves to MNS (minus) direction*. When it enters HLS (Origin proximity) area (2), it
decelerates and stops momentarily, then reveres its move direction. (3) The Motor goes out
HLS range once, then reverses again and enters HLS area at the origin search velocity. (4) It
moves to the first point where the resolver value becomes 0 (= rising edge of the øZ) and
completes the home return.
* The direction of move can be changed with the parameter HD (Home return direction).
HD0: PLS (Plus direction)
HD1: MNS (Minus direction, Shipping set)
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If the home offset value HO is set, the Motor moves farther past the resolver 0 point by the offset
value, then completes the home return operation.
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