B--63003EN--1/02
6. INTERPOLATION FUNCTION
461
NOTE
1 Specifying an arc center with addresses I, K, and J
When the distance from the arc start point to the arc center
is specified with addresses I, K, and J, a P/S alarm (No.
5059) is issued if:
Example:
When IS-- B and metric input are selected, issuing the
following command (radius specification) will result in the
issue of a P/S alarm (No. 5059):
2 Tool nose radius compensation
In tool nose radius compensation mode, a P/S alarm (No.
5059) is issued if the distance from the tool nose radius
center to the arc center exceeds the maximum value which
can be specified.
I
2
+K
2
Maximum value which can be specified <
G50X0Z0;
G18 G02 X11.250 Z10. I--800000.000 K900000.000 F5.0;
I
2
+K
2
= (–800000.000)
2
+900000.000
2
∴
= 1204159.458
> 999999.999
The feedrate in circular interpolation is equal to the feedrate specified by
the F code, and the feedrate along the arc (the tangential feedrate of the
arc) is controlled to be the specified feedrate.
The error between the specified feedrate and the actual tool feedrate is
2% or less. However, this feedrate is measured along the arc after the
cutter compensation (M series) or tool nose radius compensation (T
series) is applied.