Mitsubishi Electric MELDAS 600M Series Instruction Manual page 398

(2) Absolute position detection system coordinate system
For the dogless-type, the machine end, marked point or grid point is used as the absolute position
basic point. The 1st reference point is set at the position (reversed sign) designated with "270002
Ref position offset" on the Zero point set screen.
The basic machine coordinate system zero point is set at the position set with "150008 #1_rfp" on
the Z-point rtn param screen, using the reference point as the basic point.
With the dog-type, there is no absolute position basic point. The reference point is the basic point,
and the basic machine coordinate system is determined by the "#150008 #1_rfp" value.
(3) Reference point return operation
The "dog-type" and "high-speed" reference point return operations are as follows.
Dog-type absolute position detection
Dogless-type absolute position detection
Absolute position detection invalid
Downloaded from ManualsNet.com
CHAPTER 3 MAINTENANCE
4. Absolute Position Detection
Basic machine coordinate system
zero point (G53 zero point)
search engine
270002
Ref point of fset
150008
1st reference point
#1_rfp
Manual reference point
return
Follows axis parameter
"Manual dog type"
High-speed
Follows axis parameter
"Manual dog type"
III – 12
Absolute position
orign point
(For dogless only)
G28 automatic
reference point return
Follows axis parameter
"Automatic dog"
High-speed
Follows axis parameter
"Automatic dog"