
14. MEASUREMENT
B–63523EN–1/03
1752
#7
6200
#6
SRE
#5 #4
HSS
#3 #2 #1 #0
[Data type] Bit
HSS 0 : The skip function does not use high-speed skip signals.
1 : The skip function uses high-speed skip signals.
SRE When a high-speed skip signal is used:
0 : The signal is considered to be input at the rising edge (0 ³ 1).
1 : The signal is considered to be input at the falling edge (1 ³ 0).
#7
6201
#6 #5
CSE
#4 #3 #2 #1
SEB
#0
SEA
[Data type] Bit
SEA When a high speed skip signal goes on while the skip function is used,
acceleration/deceleration and servo delay are:
0 : Ignored.
1 : Considered and compensated (type A).
SEB When a high speed skip signal goes on while the skip function is used,
acceleration/deceleration and servo delay are:
0 : Ignored.
1 : Considered and compensated (type B).
NOTE
Compensation can be performed in either of two ways: type
A or type B. The skip signal of the skip function causes the
NC to store the current position. The current position,
stored in the NC, is subject to the servo delay and differs
from the machine position by an amount corresponding to
the servo delay. This difference can be determined from the
position error of the servo system and the accumulated
pulses caused by feed acceleration/deceleration executed
by the NC. Provided this difference is considered, the servo
delay need not be considered as a measurement error. The
difference can be reduced by applying either of the following
methods, as determined by the parameter settings.
1) Type A:
A value calculated from the cutting time constant and
servo time constant (loop gain) is taken as the difference.
2) Type B:
The value calculated from the position error and the
accumulated pulses caused by
acceleration/deceleration, when the skip signal is
enabled, is taken as the difference.
CSE For continuos high–speed skip command G31 P90, high–speed skip
signals are :
0 : Effective at either a rising or falling edge (depending on the setting of
bit 6 (SRE) of parameter No. 6200)
1 : Effective for both the rising and falling edges
Parameter