Mitsubishi Electric MELSEC-Q Series - Axis Fixed-Pitch Feed Control

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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.
Servo
instruction
Positioning
method
Number of
control axes
Items set using MT Developer2
Speed
change
Common Arc Parameter block Others
Parameter block No. Axis Address/travel value Command speed Dwell time M-code Torque limit value Auxiliary point Radius Central point Interpolation control unit 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 Advanced S-curve acceleration/deceleration Cancel WAIT-ON/OFF
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.