Hpr Method (1): Proximity Dog Method [Rj010 Mode] - Mitsubishi Electric MELSEC-Q Series User Manual

8.2.3 HPR method (1): Proximity dog method [RJ010 mode]

The machine HPR is started.
1)
(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.
The machine decelerates to the "[Pr.47] Creep speed", and subsequently moves at that speed.
3)
(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.
The HPR complete flag ([Md.31] Status: b4) turns from OFF to ON and the HPR request flag ([Md.31] Status: b3)
5)
turns from ON to OFF.
POINT
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.
Machine HPR start
(Positioning start signal)
HPR request flag
(
Status: b3
Md.31
HPR complete flag
(
Status: b4
Md.31
Axis operation status
Md.26
Movement amount after
Md.34
proximity dog ON
Md.20 Feed current value
Feed machine value
Md.21
The following shows an operation outline of the "proximity dog method" HPR method.
Operation chart
V
1)
Proximity dog
ON
OFF
ON
OFF
)
OFF
)
Standby HPR
0
Inconsistent
Value of the machine moved is stored.
Inconsistent
Fig. 8.3 Proximity dog method machine HPR
HPR speed
Pr.46
Deceleration at the proximity dog ON
Pr.47
2) 3) 4) 5)
A
Md.34
ON
OFF
Zero signal
One servo motor rotation
8 - 8
Chapter 8 HPR Control
Creep speed
t
Movement amount after proximity dog ON
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.
ON
Standby
Value of 1
HP address
1