Mitsubishi Electric A173UHCPU Programming Manual

7. POSITIONING CONTROL
7 − 51
7.9 1-Axis Fixed-Pitch Feed Control
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.
Items Set by Peripherals
Common Arc Parameter Block Others
Servo
Instruction
Positioning
Method
Number of
Controllable
Axes
Parameter Block No. Axis Address/Travel Value Commanded Speed Dwell Time M-Code Torque Limit Value Auxiliary Point Radius Center Point Control Units Speed Limit Value Acceleration Time Deceleration Time Rapid Stop Deceleration Time Torque Limit Value Deceleration Processing on Stop Input Allowable Error Range for Circular Interpolation S-Curve Ratio Cancel Start Speed Change
FEED-1
Incremental 1 ∆ !!! ∆∆ ∆∆∆∆∆∆ ∆∆∆OK
! : Must be set
∆ : Set if required
[Control Details]
(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)
V
t
Travel value
Commanded speed
Fixed-pitch feed using FEED-1 instruction
Reverse
direction
Forward
direction
Current stop position
Travel direction
for Negative sign
: indicates set data
Operation timing
Positioing direction
SVST
instruction
Travel direction
for Positive sign
Fig.7.23 1-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.

Mitsubishi Electric A173UHCPU Specifications

General

Brand	Mitsubishi Electric
Model	A173UHCPU
Category	Control Unit
Language	English