
B-63943EN-1/02 6.INTERPOLATION FUNCTION
- 691 -
Parameter
3471
Allowable difference between the specified end position and the end
position obtained from the increase/decrease and frequency in spiral
interpolation or conic interpolation
[Input type] Parameter input
[Data type] Real axis
[Unit of data] mm, inch (input unit)
[Minimum unit of data] Depend on the increment system of the applied axis
[Valid data range] 0 to 999999999
This parameter sets the maximum allowable difference (absolute
value) between the specified end position and the end position
obtained from the increase/decrease and frequency in spiral or conic
interpolation.
3472
Minimum radius needed to maintain the actual speed in spiral or conic
interpolation
[Input type] Parameter input
[Data type] Real path
[Unit of data] mm, inch (input unit)
[Minimum unit of data] Depend on the increment system of the reference axis
[Valid data range] (For IS-B and millimeter machines, 1.0 to 999999.999; for inch
machines, 1.0 to 99999.9999)
If this parameter value is 0 or a value outside the valid data range, the
minimum value of the range is assumed.
In spiral interpolation and conic interpolation, the speed is generally
held constant. In an area near the center, the spiral radius decreases,
resulting in an extremely high angular velocity. To prevent this, once
the spiral radius has reached the parameter-set value, the angular
velocity subsequently remains constant. As a result, the actual speed
decreases.
Alarm and message
Number Message Description
PS5122 ILLEGAL COMMAND IN SPIRAL A spiral interpolation or conical interpolation command has an
error. Specifically, this error is caused by one of the following:
1) L = 0 is specified.
2) Q = 0 is specified.
3) R/, R/, C is specified.
4) Zero is specified as height increment.
5) Zero is specified as height difference.
6) Three or more axes are specified as the height axes.
7) A height increment is specified when there are two height
axes.
8) Q is specified when radius difference = 0.
9) Q < 0 is specified when radius difference > 0.
10) Q > 0 is specified when radius difference < 0.
11) A height increment is specified when no height axis is
specified.
PS5123 OVER TOLERANCE OF END POINT
IN SPIRAL
The difference between a specified end point and the calculated
end point exceeds the allowable range (parameter 3471).