You need to let Brian know that Ij is broken with Coord Rotation.I t used to work fine.

Just a thought, (;-) TP

I've seen a couple of past posts discussing it, so he probably already knows.

Brian just posted that he has fixed this in the next rev. http://www.machsupport.com/forum/index.php/topic,16603.msg113151.html#msg113151

Mike

I just tested with arcs and circles with G68. What was it that was not working right?? Everything looked ok here.

(;-) TP

This is what I'm seeing in the tool path display.  The first is a shot of the original and the second is after executing a G68.  This is on version R3.042.036.

Could you post your code for me to test here? That looks like an IJ setting problem.

Thanks (;-) TP

I agree.  It looks as if it's in absolute IJ mode when it should be incremental.  That's not it though.  The G58 causes what you see in the second image and a G59 returns it back to normal.  Here's the code.  On line 40 I'm not sure what the G53 and G90 are doing, but that line is the same in every program I've run for the last year.  The M7 turns on an output (downdraft blower) and the M1100 toggles the THC on.

N0000 (Filename: rounded rectangle NO CW LL.tap)
N0010 (Post processor: THC300.scpost)
N0020 (Date: 02/10/2010)
N0030 G20 (Units: Inches)
N0040 G53 G90 G40 M7 M1100
N0050 F1
N0060 (Part: rounded rectangle NO)
N0070 (Operation: No Offset, DEFAULT, T1: Plasma, 0.05 in kerf, 120IPM)
N0080 M06 T1  (Plasma, 0.05 in kerf, 120IPM)
N0090 G00 Z0.3750
N0100 G00 X0.2500 Y0.0000
N0110 (Operation: Reference Torch)
N0120 F15
N0130 G31 Z-1
N0140 G92 Z-0.1452
N0150 G00 Z0.2000
N0160 M03
N0170 G04 P0.5
N0180 G01 Z0.1000 F30
N0190 G02 X0.0000 Y0.2500 I0.0000 J0.2500 F120.0
N0200 G01 Y1.7500 F120
N0210 G02 X0.2500 Y2.0000 I0.2500 J0.0000 F120.0
N0220 G01 X2.7500 F120
N0230 G02 X3.0000 Y1.7500 I0.0000 J-0.2500 F120.0
N0240 G01 Y0.2500 F120
N0250 G02 X2.7500 Y0.0000 I-0.2500 J-0.0000 F120.0
N0260 G01 X0.2500 F120
N0270 M05
N0280 G00 Z0.3750
N0290 G00 X0 Y0
N0300 M30

I just ran the code and it runs fine I rotated 45 deg at a time all the way around.

Just a thought, (;-) TP

What version of mach are you running?

Ver .022. I dought it has anything to do with the G68 itself.
Just a thought, (;-) TP