Adjusting The Absolute Position Detection System - Mitsubishi Electric M700VS Series Setup Manual

MITSUBISHI CNC
7 Setting the Position Detection System
There are two kinds of position detection system: one is "relative position detection", which establishes the reference
position (zero point) at every CNC power-ON; the other is "absolute position detection", which allows to start the
operation without establishing the reference position (zero point) again after the CNC power-ON.

7.1 Adjusting the Absolute Position Detection System

There are four types of the absolute position zero point initialization set: "marked point alignment method", "marked point
alignment method II", "machine end stopper method", and "dog-type".
Set the parameter "#2049 type (Absolute position detection method)" for the type and method of absolute position zero
point initialization set.
The required components differ depending on the detection method.
Marked point
alignment method I
Required
component
#2049 type
The first grid point
which is returned from
Basic position
where the mark is
7.1.1 Marked Point
Reference
Alignment Method I
Each method has the following characteristics
(1)Marked point alignment method I
Align the table side's mark and the machine side's mark.
The first grid point which is returned from the marks are aligned is determined as the basic position.
Because the first grid point which is returned from the marks are aligned is determined as the basic position, the
reproducibility is kept even the position information is lost due to runnning out of battery etc.
(2) Marked point alignment method II
Align the table side's mark and the machine side's mark.
The position where the marks are aligned is determined as the basic position.
Because the position where the marks are alinged is determined as the basic position, the reproductivity is low if the
position information is lost due to running out of battery etc.
(3) Machine end stopper method
[When #2059 zerbas = 0]
Push the table against the machine end stopper.
The position where the table is pushed against the machine end stopper is determined as the basic position.
[When #2059 zerbas = 1]
Push the table against the machine end stopper.
The first grid point which is returned from where the table is pushed against the machine end stopper is
determined as the basic position.
There are two types of the machine end stopper method: automatic initialization and manual initialization.
When the automatic initialization is applied, the axis travels automatically after the JOG is started.
When the manual initialization is applied, the axis travels by handle mode or JOG mode while confirming each
operation.
76
Marked point
alignment method II
None None
2 4
The position where the
marks are aligned.
aligned.
7.1.2 Marked Point
Alignment Method II
Machine end stopper method
Machine end stopper
1
The position where the table is pushed
against the machine end stopper.
Or the first grid pointed which is
returned from where the table is pushed
against the machine end stopper.
7.1.3.1 Machine End Stopper Method:
Automatic Initialization
7.1.3.2 Machine End Stopper Method:
Manual Initialization
Dog type
Dog, dog-sensor
3
The first grid point after
the dog OFF.
7.1.3.3 Dog-type