Mitsubishi Electric M800W Series, Connection And Set Up Manual

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M800W/M80W Series Connection and Setup Manual
25 Setting the Position Detection System
497 IB-1501268-K
25.1.8 Precautions Common for the Dogless-type Absolute Position Encoder
(1) Example of setting "#2 Zero-P" parameter
For the "#2 Zero-P" parameter, set the coordinate value of the absolute position origin point (mechanical basic
position or electrical basic position" looking from the basic machine coordinate system zero point.
(2) Setting the reference position
The reference position can be set as shown below by setting the "#2037 G53ofs".
(3) When an MPI scale made by Mitsubishi Heavy Industries Machine Tool Co., Ltd. is used, set the zero point return
parameters so that Z phase of the MPI scale becomes the grid point (electric basic position), and then perform zero
point initialization setting.
(Example 1) To set the zero point
at 50.0mm before absolute
position origin point on + end
(Example 2) To set the zero point
at 400.0mm before the machine
basic position or absolute position
origin point on - end.
(Example 3) To set the basic machine coordinate system zero point on the grid point, calculate the "#2 Zero-P" parameter
setting value as shown below using the value displayed at "Machine end". "Machine end" shows the distance from the
mechanical basic position to the previous grid point.
(Note that when setting the electrical basic position coordinate value in "#2 Zero-P", the "Machine end" value does not
need to be considered.)
To set the third gird point as the
zero point when the "Machine
end"display is -5.3 at the + end
basic position. (Example of
10.0mm grid interval.)
(Example 1) To set the reference
position to the same position as
the basic machine coordinate
system zero point.
(Example 2) To set the reference
position at a position 200.0mm to
the + side from the basic machine
coordinate zero point.
(To set the basic machine
coordinate system zero point
300.0mm front of the absolute
position origin point.)
Basic machine coordinate
system zero point
"#2 Zero-P" = 50.0
Absolute position
origin point
(Mechanical basic
position or electrical
basic position)
"#2 Zero-P" = 400.0
Absolute position
origin point
Basic machine
coordinate system
zero point
(Mechanical basic
position or electrical
basic position)
10.0 10.0
"Machine end" = -5.3
"#2 Zero-P" = 25.3
Basic machine coordinate
system zero point
Mechanical
basic position
Basic machine
coordinate system
zero point
Reference
position
"G53ofs" = 0
"#2 Zero-P"
Absolute position
origin point
(Mechanical basic
position or electrical
basic position)
"G53ofs" = 200.0
Reference position
"#2 Zero-P" = 300.0
Absolute
position
origin point
Basic machine
coordinate
system
zero point
(Mechanical
basic position
or electric
basic position)