Adjusting The Absolute Position Detection System - Mitsubishi Electric M800VS Series Connection And Set Up Manual

M800VS/M80V Series Connection and Setup Manual
22 Setting the Position Detection System

22.1 Adjusting the Absolute 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.
22.1 Adjusting the Absolute Position Detection System
There are four types of the absolute position zero point initial setting: "marked point alignment method I", "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
initial setting.
The required components differ depending on the detection method.
Method
Marked point alignment method I None
Marked point alignment method II None
Machine end stopper method
Dog type
 Characteristics of each method
[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 running out of battery etc.
[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 aligned is determined as the basic position, the reproductivity is low if the position
information is lost due to running out of battery etc.
[Machine end stopper method]
Pushes the table against the machine end stopper.
 When "#2059 zerbas" is set to "0"
The position where the table is pushed against the machine end stopper is taken as the basic position.
 When "#2059 zerbas" is set to "1"
The first grid point which is returned from the position where the table is pushed against the machine end stopper is taken
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.
[Dog-type]
This method requires a dog sensor.
Move the table until the dog is kicked, and the first grid point after the dog OFF is determined as the basic position.
IB-1501613-A
Required component
The first grid point which is returned from where the
mark is aligned.
The position where the marks are aligned.
Machine end stopper The position where the table is pushed against the
machine end stopper.
The first grid point which is returned from where the
table is pushed against the machine end stopper.
Dog, dog-sensor The first grid point after the dog OFF.
Basic position
444
#2049 #2059
Reference
type zerbas
2 1 22.1.1
4 0 22.1.2
1 0 22.1.3
22.1.4
1 1
3 0 22.1.5