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6 POSITIONING CONTROL
6.10 1 Axis Fixed-Pitch Feed Control
Positioning control for specified axis of specified travel value from the current stop
point.
Fixed-pitch feed control uses the FEED-1servo instruction.
Items are set in peripheral devices
Common Arc Parameter block Others
Servo
instruction
Positioning
method
Number of
control axes
Parameter block No.
Axis
Address/travel value
Command s
p
eed
Dwell time
M-code
Tor
q
ue limit value
Auxiliar
y
p
oint
Radius
Central
p
oint
Control units
S
p
eed limit value
Acceleration time
Deceleration time
Ra
p
id sto
p
deceleration time
Tor
q
ue limit value
Deceleration
p
rocessin
g
on sto
p
in
p
ut
Allowable e
r
ror ran
g
e for circular inter
p
olation
S-curve ratio
Cancel
WAIT-ON/OFF
Speed change
FEED-1
Incremental 1
Valid
: Must be set
: Set if required
[Control details]
(1) Positioning control for the specified travel value from the current stop position "0"
is executed.
(2) The travel direction is set by the sign (+/ -) of the travel value, as follows:
• Positive travel value .............Positioning control to forward direction
(Address increase direction)
• Negative travel value............Positioning control to reverse direction
(Address decrease direction)
Positioning direction Operation timing
Reverse
direction
Forward
direction
Travel direction
for negative sign
Travel direction
for positive sign
Current stop position
Command speed
Fixed-pitch feed by FEED-1 instruction
Travel value
V
t
Servo program start
: Indicates setting data
(Note)
Fig.6.23 1 axis fixed-pitch feed control
POINT
Do not set the travel value to "0" for fixed-pitch feed control.
If the travel value is set to "0", fixed-pitch feed completion without fixed-pitch feed.