UG8.5型腔铣生成的刀路圆弧插补为什么这么大？

9lnUGS5x

G1 X-140.53 Y-45.712
  m' R* ^2 U/ O) V- I' q% |G2 X-141.634 Y18.401 I16854.629 J322.27
G1 X-141.662 Y19.962
G3 X-141.765 Y28.091 I-5881.088 J-70.733
G1 X-146.231
X-146.267 Y25.715
X-146.299 Y23.574