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Chapter 8 HPR Control
8.2.3 HPR method (1): Proximity dog method [RJ010 mode]
The following shows an operation outline of the "proximity dog method" HPR method.
Operation chart
1)
The machine HPR is started.
(The machine begins the acceleration designated in "[Pr.51] HPR acceleration time selection", in the direction
designated in "[Pr.44] HPR direction". It then moves at the "[Pr.46] HPR speed" when the acceleration is completed.)
2)
The machine begins decelerating when the proximity dog ON is detected.
3)
The machine decelerates to the "[Pr.47] Creep speed", and subsequently moves at that speed.
(At this time, the proximity dog must be ON. The workpiece will continue decelerating and stop if the proximity dog is
OFF.)
4)
After the proximity dog turns OFF, the machine stops. It then restarts and stops at the first zero point.
5)
The HPR complete flag ([Md.31] Status: b4) turns from OFF to ON and the HPR request flag ([Md.31] Status: b3)
turns from ON to OFF.
1
( )
HPR request flag
( )
t
Machine HPR start
(Positioning start signal)
ON
OFF
HPR speed
Deceleration at the proximity dog ON
Creep speed
ON
OFF
OFF
ON
HPR Standby
Axis operation status
Inconsistent
0
Movement amount after
proximity dog ON
Value of the machine moved is stored. HP address
Feed current value
Feed machine value
V
Zero signal
Value of 1
Movement amount after proximity dog ON
Proximity dog
ON
OFF
One servo motor rotation
HPR complete flag
Md.34
Adjust so the proximity dog OFF position is
as close as possible to the center of the zero
signal HIGH level.
If the proximity dog OFF position overlaps
with the zero signal, the machine HPR stop
position may deviate by one servomotor
rotation.
1) 2) 3) 4) 5)
Pr.46
Pr.47
Md.34
Md.20
Md.21
Md.26
Md.31
Status: b3
Md.31
Status: b4
A
After the home position return
(HPR) has been started, the
zero point of the encoder must
be passed at least once before
point A is reached.
POINT
Standby
Inconsistent
Fig. 8.3 Proximity dog method machine HPR
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