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9 MAIN POSITIONING CONTROL
9.1.3 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
zero point as a reference. This address is regarded as the positioning address.
(The start point can be anywhere.)
Address
100
Address
150
Address
300
100
A point
150
B point
300
C point
Within the stroke limit range
Address 150
Address
100
Address 100
Address 150
Z
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p
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t
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c
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p
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Start point
End point
·
Fig. 9.6 Absolute system positioning
Increment 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.
Movement amount
+100
Movement
amount -150
Movement amount
-100
Movement amount+50
100 150 300
Movement amount-100
A point B point
Within the stroke limit range
C point
Movement amount
+100
Movement amount +100
Start point
End point
·
Fig. 9.7 Increment system positioning