I'm using Mach3 for my CNC Plasma machine recently all uploaded G-Codes are aperaring in Mach3 with unexpected circles. Problem does not exists in other profiles in Mach3 on the same computer so it has to be something wrong with my plasama profile setting. Circles are apearing in the same number of shapes that i would like to cut. For example if i would like to cut 4 squares in Solid Edge and ShgeetCam everything looks nice but uploading generated G-Code to that one faulty Mach3 profile gives me in addition to those 4 squares 4 circles. More shapes more unexpected circles.

So simple solution is to create new profile and just rewrite all setting but i would like to know fix for that. Thanks

To remove the crop circles Change the IJ Mode in Config. / General Config. then regen. the toolpath.

Ideally, if your Gcode contains arcs then it should contain the G90.1 or G91.1 as appropriate. The manual has further details of IJ Mode.

Tweakie.

Many thanks

Changing IJ Mode to incr. solved the problem. As for the arcs well problem was that circles appeard even when i uploaded gcode for one simple square.

N0010 (Filename: THC_test.tap)
N0020 (Post processor: Mach3 flame with THC - G31.scpost)
N0030 (Date: 29.05.2021)
N0040 G21 (Units: Metric)
N0050 G53 G90 G40
N0060 F1
N0070 S500
N0080 (Part: THC_test)
N0090 (Operation: Na zewnątrz, Domyślne, T1: Plazma, 1,5 mm szczelina)
N0100 M06 T1  (Plazma, 1,5 mm szczelina)
N0110 G00 X150.7500 Y210.0000 Z10.0000
N0120 G31 Z -100 F500.0
N0130 G92 Z-0.0800
N0140 G00 Z3.0000
N0150 M03
N0160 G04 P0.5
N0170 G01 X150.7500 Y210.0000 Z2.0000 F100
N0180 G03 X150.0000 Y210.7500 I-0.7500 J0.0000 F2000.0
N0190 G01 X100.0000 F2000
N0200 G03 X99.2500 Y210.0000 I0.0000 J-0.7500 F2000.0
N0210 G01 Y10.0000 F2000
N0220 G03 X100.0000 Y9.2500 I0.7500 J0.0000 F2000.0
N0230 G01 X150.0000 F2000
N0240 G03 X150.7500 Y10.0000 I0.0000 J0.7500 F2000.0
N0250 G01 Y210.0000 F2000
N0260 M05
N0270 G00 Z10.0000
N0280 M05 M30

Right now everything seems to be fine i will run some simple cuts to test.

I am pleased to hear that it has solved the problem.

The Gcode for your simple square contains G03 moves (arcs) which produce the rounded corners.

Tweakie.