UG后处理程序错误

UG后处理程序错误，出来的程序中的数值明显不对，偏小，这个例子是用20的机夹刀。加工220的内轮廓圆，Z向一次下0.5，出来的程序却是这样子的
%
N0010 G40 G17 G90 G70
N0020 G91 G28 Z0.0
:0030 T00 M06
N0040 G0 G90 X1.6275 Y-3.4621 S2000 M03
N0050 G43 Z.3937 H00
N0060 Z.1181
N0070 Z.0787
N0080 G1 Z-.0394 F59.1 M08
N0090 G3 X1.8827 Y-3.4577 I.1234 J.2464
N0100 X1.9685 Y-3.4095 I-1.8827 J3.4577
N0110 I-1.9685 J3.4095
N0120 X2.0531 Y-3.3593 I-1.9685 J3.4095
N0130 X2.1845 Y-3.1406 I-.1437 J.2352
N0140 G0 Z.0787
N0150 Z.3937
N0160 X1.6275 Y-3.4621
N0170 Z.0787
N0180 Z.0394
N0190 G1 Z-.0787
N0200 G3 X1.8827 Y-3.4577 I.1234 J.2464
N0210 X1.9685 Y-3.4095 I-1.8827 J3.4577
N0220 I-1.9685 J3.4095
N0230 X2.0531 Y-3.3593 I-1.9685 J3.4095
N0240 X2.1845 Y-3.1406 I-.1437 J.2352
N0250 G0 Z.0394
N0260 Z.3937
N0270 X1.6275 Y-3.4621
N0280 Z.0394
N0290 Z0.0
N0300 G1 Z-.1181
N0310 G3 X1.8827 Y-3.4577 I.1234 J.2464
N0320 X1.9685 Y-3.4095 I-1.8827 J3.4577
N0330 I-1.9685 J3.4095
N0340 X2.0531 Y-3.3593 I-1.9685 J3.4095
N0350 X2.1845 Y-3.1406 I-.1437 J.2352
N0360 G0 Z0.0
N0370 Z.3937
N0380 X1.6275 Y-3.4621
N0390 Z0.0
N0400 Z-.0394
N0410 G1 Z-.1575
N0420 G3 X1.8827 Y-3.4577 I.1234 J.2464
N0430 X1.9685 Y-3.4095 I-1.8827 J3.4577
N0440 I-1.9685 J3.4095
N0450 X2.0531 Y-3.3593 I-1.9685 J3.4095
N0460 X2.1845 Y-3.1406 I-.1437 J.2352
N0470 G0 Z.3937
N0480 M02
%
请问这是怎么回事，着急用啊，希望大伙帮帮忙啊，在此感激不尽。

看看是不是后处理的公英制出了问题？？