
16
16.6 Reference Position Return
840
The timing charts for the basic procedures are given below.
ZRN
+J1
*DEC1
Grid
ZP1
ZRF1
Feedrate
Rapid traverse rate
FL rate
. . . . . . . . . . . . . . . . . . . . .
JOG or TEACH IN
JOG mode
16.6.1.2 Reference position return location adjustment
D Grid shift
The electronic grid can be shifted by the distance set in PRM1850, thus
shifting the reference position. The grid shift to be set in the parameter
must not exceed the reference counter capacity (PRM1821) (grid
interval).
Speed
Rapid traverse
(PRM1420α)
FL rate
(PRM1425 α )
Time
Rapid traverse acc./dec. time constant (PRM1620 α )
*DECα
PCZ
Grid
Reference
count.
Counter capacity
10000P
+
10000P
CMR
f
Error
counter
Proportion
gain
Speed
loop
M
–
GRID
PC
10mm/rev
Grid shift amount
(PRM1850)
Reference counter capacity
(PRM1821)
FFG
4
10000P/rev
(Flexible feed gear)
Command
(Serial)
D Separate Type Pulse Coder or Linear Scale is Used
1821
Reference counter capacity per axis [P]
PRM
Normally, the number of feedback pulses per motor revolution is set to
the reference counter capacity.
: When plural reference marks are on a linear scale, a quotient of the
distance between the reference marks divided by an integer may
be used as a reference counter capacity: