9 Positioning Control
9.9 Linear Interpolation Operation
175
FX
3U
-20SSC-H Positioning Block User's Manual
1
Int
roduct
ion
2
Sy
stem
conf
igur
ati
on
3
Exam
ple
C
onnect
ion
4
Ins
tall
a
tion
5
Wi
rin
g
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Me
m
o
ry
confi
gur
at
ion
and da
ta
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Befor
e
star
ting
positi
oning
contr
o
l
8
M
anual c
ont
ro
l
9
Posit
ioni
ng
C
ont
rol
10
Table O
per
at
ion
*1.
Shaded columns are invalid for interpolation operation.
*2.
In interpolation operation, the system performs trapezoidal acceleration/deceleration even if
approximate S-shaped acceleration/deceleration is selected.
*3.
For cautions on setting the pulse rate and feed rate in interpolation operation, refer to the following.
→
Refer to Subsection 7.11.3
POINT
• When using linear interpolation operation, the operation pattern selection should set in both axes as linear
interpolation.
If the same operation pattern is not set in both axes, the following operation is executed.
1) When linear interpolation is set to the operation pattern of the X-axis and a different operation pattern
is set to the Y-axis
The operation pattern of the Y-axis is disregarded, and linear interpolation operation is executed.
2) When an operation pattern different than linear interpolation is set to the operation pattern of the X-axis
and linear interpolation is set to the Y-axis
X-axis: Operates by the operation pattern set in the X-axis.
Y-axis: Does not operate.
• The positioning completion signal turns ON if the travel distance is 0.
If the travel distance is 0 or the travel time is too short, however, it is impossible for the sequence program
to detect the positioning completion signal turning OFF.
*4
*4. Turning OFF of the positioning completion signal can be detected when the positioning completion
signal output waiting time is set if the version is Ver. 1.20 or later.
→
For details on the Positioning completion signal output waiting time, refer to Subsection 7.9.11
• When interpolation operations are consecutively repeated in a table operation, the 20SSC-H provides
continuous pass operation.
→
For details on the continuous pass operation, refer to Section 10.10
• Pulse rate and feed rate
In versions earlier than Ver. 1.20, make sure that the ratio between the pulse rate and the feed rate is
equivalent between the X-axis and the Y-axis.
In versions Ver. 1.20 or later, if the ratio between the pulse rate and the feed rate is not equivalent between
the X-axis and the Y-axis, set "interpolation gear ratio selection" to "X/Y-axis."
→
For selection of the interpolation gear ratio, refer to Subsection 7.11.3
BFM Number
Data type
X-axis
Y-axis
Operation speed present value
BFM #11,#10
BFM #111,#110
*1
Monitor data
System of units (user unit)
Operation parameter 1
BFM #14000 b1,b0
BFM #14200 b1,b0
Positioning parameters
Unit of measurement for the
user units
Operation parameter 1
BFM #14000 b3,b2
BFM #14200 b3,b2
Positioning parameters
Position data magnification
Operation parameter 1
BFM #14000 b5,b4
BFM #14200 b5,b4
Positioning parameters
Acceleration/deceleration
mode
*2
Operation parameter 1
BFM #14000 b11
BFM #14200 b11
Positioning parameters
STOP mode
Operation parameter 1
BFM #14000 b15
BFM #14200 b15
Positioning parameters
Servo end check enabled/
disabled
Operation parameter 2
BFM #14002 b0
BFM #14202 b0
Positioning parameters
Servo ready check enabled/
disabled
Operation parameter 2
BFM #14002 b1
BFM #14202 b1
Positioning parameters
Interpolation gear ratio
selection
*3
(Ver.1.20 or later)
Operation parameter 2
BFM #14002 b14
Positioning parameters
Pulse rate
*3
BFM #14005,#14004 BFM #14205,#14204 Positioning parameters
Feed rate
*3
BFM #14007,#14006 BFM #14207,#14206 Positioning parameters
Maximum speed
BFM #14009,#14008 BFM #14209,#14208 Positioning parameters
Interpolation time constant
BFM #14022
BFM #14222
Positioning parameters
Servo end evaluation time
BFM #14032
BFM #14232
Positioning parameters
Positioning completion signal output waiting time (Ver.1.20
or later)
BFM #14106
BFM #14306
Positioning parameters