Mitsubishi Electric RD77MS16, User Manual

Page: 60 / 644

58
3 MAJOR POSITIONING CONTROL
3.1 Outline of Major Positioning Controls
Designating the positioning address
The following shows the two methods for commanding the position in control using positioning data.
Absolute system
Positioning is carried out to a designated position (absolute address) having the home position as a reference. This address is
regarded as the positioning address. (The start point can be anywhere.)
Incremental system
The position where the machine is currently stopped is regarded as the start point, and positioning is carried out for a
designated movement amount in a designated movement direction.
Address
100
Address
150
Address
300
Address 100
Address 150
• Start point
End point
Address
100
100 150 300
Within the stroke limit range
Address 150
A point B point C point
Home position
(Reference point)
Movement amount
+100
Movement
amount
-150
Movement amount
+100
Within the stroke limit range
• Start point
End point
Movement amount
-100
100 150 300
Movement amount -100
250
A point B point C point
Home position
(Reference point)