Filter
Top Products
4. Absolute Position Detection System
4.3 Starting up Absolute Position Detection System
III-17
4.3 Starting up Absolute Position Detection System
It is necessary to perform zero-point initialization before starting up the absolute position detection system.
Zero-point initialization sets up the coordinate system to be ready for operation.
(1) Operation before establishment of absolute position
If an attempt is made to start up the system while zero-point initialization has never been performed or
the absolute position is lost, an NC alarm occurs with the following alarm displayed and non-initialized
axis name. Under this state, the NC coordinate system is undefined and subjected to the restrictions in
the following table in individual modes. If this occurs, perform zero-point initialization to set up the
coordinate system.
Alarm: Z70 ABS.ILLEGAL
Z71 DETECTOR EEROR
Operation in individual modes
Absolute position detection method
Operation mode
Dog-less type Dog type
Memory/MDI
Move command invalid
(including G28) (Note 1)
Move command invalid
(G28 is valid) (Note 1)
Jog feed Valid Valid
Rapid traverse Valid Valid
Handle Valid Valid
Step Valid Valid
Zero return Start invalid (Note 2) Start valid
(Note 1) A program error (P430) occurs.
(Note 2) An attempt to start the axis for which the absolute position has not been set up causes "M01
OPERATION ERROR 0024." (It is effective for the axis for which the absolute position has been set
up.)
(2) Selecting zero-point
initialization methods
The zero-point initialization
methods can be selected on the
"ABS. POSI PARAM" screen.
#2049 type 1: Dog-less machine
end stopper
method
2: Dog-less marked
point alignment
method
3: Dog type
BASE AXIS SERVO SPINDLE MENU
[ABS. POSI PARAM] SETUP PARAM 2.5/5
# <X> <Y> <Z> <C>
2049 type 1 1 2 3
2050 absdir 0 0 0 0
2051 check 0.000 0.000 0.000 0.000
2052 absg28 100 100 100 100
2053 absm02 100 100 100 100
2054 clpush 80 50 0 0
2055 pushf 0 100 0 0
2056 aproch 0.000 3.000 0.000 0.000
2057 nrefp 0.000 0.000 0.000 0.000
2058 nrefn 0.000 0.000 0.000 0.000
2059 zerbas 0 0 0 0
2060
#( ) DATA ( ) ( ) ( ) ( )
ABS. POSI PARAM screen
(Note) Refer to "MELDAS60/60S Series Alarm/Parameter Manual" (BNP-B2201) for details on the
parameters.