7.9 1-Axis Fixed-Pitch Feed Control - Mitsubishi Electric SV13/22 Programming Manual

7. POSITIONING CONTROL

7.9 1-Axis Fixed-Pitch Feed Control

Servo
Instruction
FEED-1
[Control Details]
Positioning direction
Reverse
direction
Travel direction for
Negative sign
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Positioning control to move the axis designated with the sequence program
positioning commands by the designated travel value from the current stop
position.
Fixed-pitch feed control uses the FEED-1 servo instruction.
Number of
Positioning
Controllable
Method
Axes
∆
!
Incremental 1
(1) Positioning control through the designated travel value from the current stop
position (0).
(2) The travel direction is designated by the sign of the travel value, as follows:
• Positive travel value ............ forward direction (increased address)
• Negative travel value........... reverse direction (decreased address)
Current stop position
Travel direction for
Positive sign
Fig. 7.23 One-Axis Fixed-Pitch Feed Control
POINT
Do not set the travel value to zero for fixed-pitch feed control.
If the travel value is set t o zero, fixed-pitch feed ends with no feed taking
place.
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Items Set by Peripherals
Common Arc
∆ ∆
! !
Operation timing
V
Commanded speed
Forward
direction
DSFRP
instruction
∗
7 − 51
Parameter Block
∆ ∆ ∆ ∆ ∆ ∆
Fixed-pitch feed using
FEED-1 instruction
Travel value
Indicates set data
Others
∆ ∆ ∆
OK
! : Must be set
∆ : Set if required
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