Opr Method (2): Count Method 1) - Mitsubishi Electric QD75MH1 User Manual

8 OPR CONTROL

8.2.4 OPR method (2): Count method 1)

The machine OPR is started.
(The machine begins the acceleration designated in "
1)
designated in "
completed.)
2) The machine begins decelerating when the near-point dog ON is detected.
The machine decelerates to the "
3)
The machine stops after the workpiece has been moved the amount set in the "
4)
amount after near-point dog ON" after the near-point dog turned ON. It then restarts and stops at the first zero point.
After a "deviation counter clear output" is output to the drive unit, the OPR complete flag
5)
OFF to ON, and the OPR request flag (
POINT
After the home position return
(OPR) has been started, the
zero point of the encoder must
be passed at least once before
point A is reached.
Adjust the setting for the movement amount after
near-point dog ON to be as near as possible to
the center of the zero signal HIGH.
If the setting for the movement amount after
near-point dog ON falls within the zero signal,
there may be produced an error of one servo
motor rotation in the OPR stop position.
OPR start
OPR request flag
[ Md.31 Status : b3]
OPR complete flag
[ Md.31 Status : b4]
Md.26 Axis operation status
Md.34 Movement amount
after near-point dog ON
Md.20 Current feed value
Md.21 Machine feed value
The following shows an operation outline of the "count method 1)" OPR method.
In the "count method 1)" OPR, the following can be performed:
•
Machine OPR on near-point dog
•
Second machine OPR after completion of first machine OPR
Near-point dog is used to the external device connector of the QD75MH. The "Illegal
near-point dog signal" (error code : 220) will occur if you used external input signal of
the servo amplifier.
Operation chart
OPR direction". It then moves at the "
Pr.44
Pr.47
V
Near-point dog OFF
Zero signal
ON
OFF
ON(1)
OFF(0)
OFF(0)
Standing by In OPR
0
Inconsistent
Inconsistent Value the machine moved is stored
Fig. 8.5 Count method1) machine OPR
Pr.51 OPR acceleration time selection", in the direction
Pr.46
Creep speed", and subsequently moves at that speed.
Md.31 Status: b3) turns from ON to OFF.
Pr. 46 OPR speed
Pr. 50 Setting for the movement amount
Pr. 47 Creep speed
A
Md.34 Movement amount after near-point dog ON
ON
Standing by
Value of
OP address
8 - 9
OPR speed" when the acceleration is
Pr.50 Setting for the movement
Status: b4) turns from
Md.31
after near-point dog ON
t
Leave sufficient distance from the zero point
position to the near-point dog OFF
First zero signal after moving a set to " Pr. 50
Setting for the movement amount after near-
point dog ON.
One servo motor rotation
ON(1)
1.
MELSEC-Q
1