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M800W/M80W Series Connection and Setup Manual
25 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.
25.1 Adjusting the Absolute Position Detection System
There are four types of the absolute position zero point initial setting: "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 initial setting.
The required components differ depending on the detection method.
Method
Marked point alignment method I
Marked point alignment method II
Machine end stopper method
Dog type
[Characteristics of each method]
(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
Push the table against the machine end stopper.
[When #2059 zerbas = 0]
The position where the table is pushed against the machine end stopper is determined as the basic position.
[When #2059 zerbas = 1]
The first grid point which is returned from the position 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.
(4) Dog method
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-1501268-K
Required
component
The first grid point which is returned from the position where
None
the mark is aligned.
None
The position where the marks are aligned.
The position where the table is pushed against the machine
end stopper.
Machine end
stopper
The first grid pointed which is returned from the position
where the table is pushed against the machine end stopper.
Dog,
The first grid point after the dog OFF.
dog-sensor
484
Basic position
#2049
#2059
Reference
type
zerbas
2
1
25.1.1
4
0
25.1.2
1
0
25.1.3
25.1.4
1
1
3
0
25.1.5
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