Hi all...
Not sure how to word my question to make it less confusing.   I have a program that I have been running on my Taig mill for years.  I made zero changes to it and set up to machine out some parts yesterday.  Upon a dry run I noticed it was entering the circle via an entry circle, then immediately doing a rapid quarter circle the other direction, then rapidiing another quarter circle back to almost the start point and then proceeding with the .5" circle it was supposed to cut.  I sent this out to Kurt at Taig and he plugged it in to his computer at Taig and it ran fine.  I have uninstalled the Mach software and reinstalled it all an my license and got the same results.

Thanks in advance!
Bill

I  think you need to reset your machine to use INC IJ G91.1 instead of Abs IJ G90.1

Just Type in G91.1 at the MDI line, that will set it to the correct mode. OR from Gen Config select Inc IJ

(;-) TP

I tried the G91.1 and checked the INC IJ setting in the gen config.  No luck.  Thanks for the info TP... Got another?

Really need to make this work!

Thanks again,
Bill

Try it the ophter way around it may need ABS IJ  G90.1


Can you post the Code(;-)

(;-) TP

Here is the code.  I have used this program for a year with no problems.  Now it adds a spike to the circles.


(Program Posted for Aluminum )
G0 G49 G40.1 G17
G80 G50 G90 G98 
G20 (Inch)
M03
(***** Circular Groove/Cutout *****)
G00 Z0.1
G00 X3.9322 Y1.5121
G41 P0.0625
G01 X4.0041 F17
G01 Z-0.34 F8.5
G03 X4.076 Y1.584 R0.0719 F17
G03 X3.156 Y1.584 R0.46
X4.076 Y1.584 R0.46
G03 X4.0041 Y1.6559 R0.0719
G40
G00 Z-0.2
(***** Circular Groove/Cutout *****)
G00 Z-0.2
G00 X3.9322 Y2.5631
G41 P0.0625
G01 X4.0041 F17
G01 Z-0.34 F8.5
G03 X4.076 Y2.635 R0.0719 F17
G03 X3.156 Y2.635 R0.46
X4.076 Y2.635 R0.46
G03 X4.0041 Y2.7069 R0.0719
G40
G00 Z0.1
(***** Circular Groove/Cutout *****)
G00 Z.1
G00 X-2.9038 Y2.5631
G41 P0.0625
G01 X-2.8319 F17
G01 Z-0.7 F8.5
G03 X-2.76 Y2.635 R0.0719 F17
G03 X-3.33 Y2.635 R0.285
X-2.76 Y2.635 R0.285
G03 X-2.8319 Y2.7069 R0.0719
G40
G00 Z-0.5
(***** Circular Groove/Cutout *****)
G00 Z-0.5
G00 X-2.9038 Y1.5121
G41 P0.0625
G01 X-2.8319 F17
G01 Z-0.7 F8.5
G03 X-2.76 Y1.584 R0.0719 F17
G03 X-3.33 Y1.584 R0.285
X-2.76 Y1.584 R0.285
G03 X-2.8319 Y1.6559 R0.0719
G40
G00 Z2.5
M01
(***** Circular Groove/Cutout *****)
M6 T4
M03 S1500
M9
G00G43 H4 Z0.1
G00 X3.1862 Y2.5731
G41 P0.0625
G01 X3.2581 F17
G01 Z-0.7 F8.5
G03 X3.33 Y2.645 R0.0719 F17
G03 X2.76 Y2.645 R0.285
X3.33 Y2.645 R0.285
G03 X3.2581 Y2.7169 R0.0719
G40
G00 Z-0.5
(***** Cut Rectangle *****)
G00 G43 H4 Z-0.5
G00 X2.461 Y2.5622
G01 Z-0.7 F17
G41 P0.0625
G01 X2.5548 Y2.5622
G03 X2.6485 Y2.656 R0.09375
G01 X2.6485 Y2.656
G01 X2.6485 Y2.829
G03 X2.5185 Y2.959 R0.13
G01 X1.3185 Y2.959
G03 X1.1885 Y2.829 R0.13
G01 X1.1885 Y2.483
G03 X1.3185 Y2.353 R0.13
G01 X2.5185 Y2.353
G03 X2.6485 Y2.483 R0.13
G01 X2.6485 Y2.656
G03 X2.5548 Y2.7497 R0.09375
G40
G01 X2.461 Y2.7497
(***** Circular Groove/Cutout *****)
G00 Z0.1
G00 X0.1752 Y1.7651
G41 P0.0625
G01 X0.2471 F17
G01 Z-0.7 F8.5
G03 X0.319 Y1.837 R0.0719 F17
G03 X-0.181 Y1.837 R0.25
X0.319 Y1.837 R0.25
G03 X0.2471 Y1.9089 R0.0719
G40
G00 Z-0.5
(***** Circular Groove/Cutout *****)
G00 Z-0.5
G00 X0.1752 Y2.3251
G41 P0.0625
G01 X0.2471 F17
G01 Z-0.7 F8.5
G03 X0.319 Y2.397 R0.0719 F17
G03 X-0.181 Y2.397 R0.25
X0.319 Y2.397 R0.25
G03 X0.2471 Y2.4689 R0.0719
G40
G00 Z-0.5
(***** Circular Groove/Cutout *****)
G00 Z-0.5
G00 X-0.3758 Y2.3251
G41 P0.0625
G01 X-0.3039 F17
G01 Z-0.7 F8.5
G03 X-0.232 Y2.397 R0.0719 F17
G03 X-0.732 Y2.397 R0.25
X-0.232 Y2.397 R0.25
G03 X-0.3039 Y2.4689 R0.0719
G40
G00 Z-0.5
(***** Circular Groove/Cutout *****)
G00 Z-0.5
G00 X-0.3758 Y1.7651
G41 P0.0625
G01 X-0.3039 F17
G01 Z-0.7 F8.5
G03 X-0.232 Y1.837 R0.0719 F17
G03 X-0.732 Y1.837 R0.25
X-0.232 Y1.837 R0.25
G03 X-0.3039 Y1.9089 R0.0719
G40
G00 Z2.5
M5 M9
M30

YEP that is the leadin arc to an arc problem When using ToolComp in some versions. I am using .043.022 and it does it here.

What version Mach3 are you running?

(;-)TP

Same as you.  What if I use my original install disk and uninstall the current version?  I didn't up grade and it was running fine.  Then all of a sudden it started acting up.  What do I do?

OK with some testing It is NOT the Leadin to arc bug IT was a case where the intial leadin move was not long enough before the first arc and it force the TC to use part of the arc as well. This can cause MAch3 to do some strange math.

Try THis I just extended the initial leadins a touch .

(Program Posted for Aluminum )
G0 G49 G40.1 G17
G80 G50 G90 G98 
G20 (Inch)
M03
(***** Circular Groove/Cutout *****)
G00 Z0.1
G00 X3.8322 Y1.5121
G41 P0.0625
G01 X4.0041 F17
G01 Z-0.34 F8.5
G03 X4.076 Y1.584 R0.0719 F17
G03 X3.156 Y1.584 R0.46
X4.076 Y1.584 R0.46
G03 X4.0041 Y1.6559 R0.0719
G40
G00 Z-0.2
(***** Circular Groove/Cutout *****)
G00 Z-0.2
G00 X3.8322 Y2.5631
G41 P0.0625
G01 X4.0041 F17
G01 Z-0.34 F8.5
G03 X4.076 Y2.635 R0.0719 F17
G03 X3.156 Y2.635 R0.46
X4.076 Y2.635 R0.46
G03 X4.0041 Y2.7069 R0.0719
G40
G00 Z0.1
(***** Circular Groove/Cutout *****)
G00 Z.1
G00 X-3.0038 Y2.5631
G41 P0.0625
G01 X-2.8319 F17
G01 Z-0.7 F8.5
G03 X-2.76 Y2.635 R0.0719 F17
G03 X-3.33 Y2.635 R0.285
X-2.76 Y2.635 R0.285
G03 X-2.8319 Y2.7069 R0.0719
G40
G00 Z-0.5
(***** Circular Groove/Cutout *****)
G00 Z-0.5
G00 X-3.0038 Y1.5121
G41 P0.0625
G01 X-2.8319 F17
G01 Z-0.7 F8.5
G03 X-2.76 Y1.584 R0.0719 F17
G03 X-3.33 Y1.584 R0.285
X-2.76 Y1.584 R0.285
G03 X-2.8319 Y1.6559 R0.0719
G40
G00 Z2.5
M01
(***** Circular Groove/Cutout *****)
M6 T4
M03 S1500
M9
G00G43 H4 Z0.1
G00 X3.0862 Y2.5731
G41 P0.0625
G01 X3.2581 F17
G01 Z-0.7 F8.5
G03 X3.33 Y2.645 R0.0719 F17
G03 X2.76 Y2.645 R0.285
X3.33 Y2.645 R0.285
G03 X3.2581 Y2.7169 R0.0719
G40
G00 Z-0.5
(***** Cut Rectangle *****)
G00 G43 H4 Z-0.5
G00 X2.461 Y2.5622
G01 Z-0.7 F17
G41 P0.0625
G01 X2.5548 Y2.5622
G03 X2.6485 Y2.656 R0.09375
G01 X2.6485 Y2.656
G01 X2.6485 Y2.829
G03 X2.5185 Y2.959 R0.13
G01 X1.3185 Y2.959
G03 X1.1885 Y2.829 R0.13
G01 X1.1885 Y2.483
G03 X1.3185 Y2.353 R0.13
G01 X2.5185 Y2.353
G03 X2.6485 Y2.483 R0.13
G01 X2.6485 Y2.656
G03 X2.5548 Y2.7497 R0.09375
G40
G01 X2.461 Y2.7497
(***** Circular Groove/Cutout *****)
G00 Z0.1
G00 X0.0752 Y1.7651
G41 P0.0625
G01 X0.2471 F17
G01 Z-0.7 F8.5
G03 X0.319 Y1.837 R0.0719 F17
G03 X-0.181 Y1.837 R0.25
X0.319 Y1.837 R0.25
G03 X0.2471 Y1.9089 R0.0719
G40
G00 Z-0.5
(***** Circular Groove/Cutout *****)
G00 Z-0.5
G00 X0.0752 Y2.3251
G41 P0.0625
G01 X0.2471 F17
G01 Z-0.7 F8.5
G03 X0.319 Y2.397 R0.0719 F17
G03 X-0.181 Y2.397 R0.25
X0.319 Y2.397 R0.25
G03 X0.2471 Y2.4689 R0.0719
G40
G00 Z-0.5
(***** Circular Groove/Cutout *****)
G00 Z-0.5
G00 X-0.4758 Y2.3251
G41 P0.0625
G01 X-0.3039 F17
G01 Z-0.7 F8.5
G03 X-0.232 Y2.397 R0.0719 F17
G03 X-0.732 Y2.397 R0.25
X-0.232 Y2.397 R0.25
G03 X-0.3039 Y2.4689 R0.0719
G40
G00 Z-0.5
(***** Circular Groove/Cutout *****)
G00 Z-0.5
G00 X-0.4758 Y1.7651
G41 P0.0625
G01 X-0.3039 F17
G01 Z-0.7 F8.5
G03 X-0.232 Y1.837 R0.0719 F17
G03 X-0.732 Y1.837 R0.25
X-0.232 Y1.837 R0.25
G03 X-0.3039 Y1.9089 R0.0719
G40
G00 Z2.5
M5 M9
M30

(;-) TP

PERFECT!  Thank you so much for your expertise!