[BrassBuilder]

I'm getting some really weird movements when I try to run a part in my lathe. I just got the lathe made and this is the first time I'm using it under CNC control to make some parts.

The basic problem is that the lathe is going everywhere but where it needs to go. I don't dare let this actually try to cut a part, because the bit would be buried somewhere into the stock.

Here is what I have done so far:

Used the T-Mach3Rcss.ppr and T-Mach3DcssT.ppr processors. (Both do the same thing. Mach3 has radius mode on the screen. I tried Mach3R first and when that didn't work, I tried the other one.)

In Config - General Config, I tried both the INC and ABS selections under IJ Mode.

I went through all the thread titles (17 pages worth) and read everything that even remotely looked like it might be related.

In DolphinCAM the part is cutting perfectly. If I could get it to do the same thing on the lathe, I would be a very happy camper.

Anything that I am missing?

I attached my practice file that I'm using. I used the Mach3R for this one. Line 190 starts a huge circle into my part.
Mike

[BrassBuilder]

I just tried one of the Mach3 wizards and the lathe worked perfectly. I'm suspecting my problems is DolphinCAM outputting the G-Code or the post processor I'm using.

I also ran the G-Code through CamBam and it is showing the same wonky tool paths. The tool is doing lots and lots of circles.

Does anyone have ANY ideas where to go with this? I was hoping to run some parts today.

Thanks

Mike

[harley4ever]

What post are you using?

[BrassBuilder]

What post are you using?

Tried both of these:

T-Mach3Rcss.ppr
T-Mach3DcssT.ppr

Mike

[harley4ever]

Perhaps that's the problem. I am pretty sure there is a new revision.

[BrassBuilder]

Perhaps that's the problem. I am pretty sure there is a new revision.

The ones on the DolphinCAD site are the same ones...well...the names are the same.

Any idea what one I am looking for?

Edit: I downloaded the ones from Dolphin...they evidently are the same ones...still don't work.

Mike

[andre-dolphin]

Can you send the PartMaster .cnc file please.

ATB
Andre

[BrassBuilder]

Can you send the PartMaster .cnc file please.

ATB
Andre

Give this a try.
Thanks
Mike

[andre-dolphin]

Have a look at the attached PDF file - this contains the PartMaster image of your part and the Gcode image from MACH3, I used the T_Mach3Rcss.ppr post.

In Mach3 I set the IJ mode to Abs. Looks OK to me.

ATB
Andre

[andre-dolphin]

oops

[BrassBuilder]

Thats interesting.

Mine is OK in Dolphin, but as soon as I load the G-code into Mach3, I get all the funny circles.

Would you have the whole g-code file? I'd like to compare it to what generates for me.

I'll give this a try later again. In the middle of cutting up a tree that blew over.

Thanks

Mike

[BrassBuilder]

Still doing the same thing. I'm using the T_Mach3Rcss.ppr post and IJ is set in ABS mode.

Here is the code that generates when I run the post process. Starting at line N140 I get a big circle and then every 50 after that (N190, N240...etc...).

My version number is 10,0,10002 if that makes any difference.

Thanks for the help. I really appreciate it.

Mike



;()
N20 G20 G18 G64 G80 G90 M49 G40 G49
; TOOL definition
N40 M09
N50 G00 X0.0 Z0.0 M05
N60 ( Turning tool )
N70 M06 T1 G43 H1
N80 M03 G94 F7.874
N90 G97 S500
N100 G40
N110 G00 X0.2504 Z0.0 G94
N120 G01 X0.2361 Z0.0
N130 X0.2361 Z-0.1792
N140 G02 X0.2504 Z-0.2304 I-0.0315 K-0.2815
N150 G00 X0.3685 Z-0.1123
N160 X0.3685 Z0.0
N170 G01 X0.2218 Z0.0
N180 X0.2218 Z-0.1477
N190 G02 X0.2361 Z-0.1792 I-0.0315 K-0.2815
N200 G00 X0.3542 Z-0.0611
N210 X0.3542 Z0.0
N220 G01 X0.2075 Z0.0
N230 X0.2075 Z-0.1236
N240 G02 X0.2218 Z-0.1477 I-0.0315 K-0.2815
N250 G00 X0.3399 Z-0.0296
N260 X0.3399 Z0.0
N270 G01 X0.1933 Z0.0
N280 X0.1933 Z-0.1038
N290 G02 X0.2075 Z-0.1236 I-0.0315 K-0.2815
N300 G00 X0.3256 Z-0.0055
N310 X0.3256 Z0.0
N320 G01 X0.179 Z0.0
N330 X0.179 Z-0.0871
N340 G02 X0.1933 Z-0.1038 I-0.0315 K-0.2815
N350 G00 X0.3114 Z0.0143
N360 X0.3114 Z0.0
N370 G01 X0.1647 Z0.0
N380 X0.1647 Z-0.0727
N390 G02 X0.179 Z-0.0871 I-0.0315 K-0.2815
N400 G00 X0.2971 Z0.031
N410 X0.2971 Z0.0
N420 G01 X0.1504 Z0.0
N430 X0.1504 Z-0.0601
N440 G02 X0.1647 Z-0.0727 I-0.0315 K-0.2815
N450 G00 X0.2828 Z0.0454
N460 X0.2828 Z0.0
N470 G01 X0.1361 Z0.0
N480 X0.1361 Z-0.0491
N490 G02 X0.1504 Z-0.0601 I-0.0315 K-0.2815
N500 G00 X0.2685 Z0.058
N510 X0.2685 Z0.0
N520 G01 X0.1218 Z0.0
N530 X0.1218 Z-0.0395
N540 G02 X0.1361 Z-0.0491 I-0.0315 K-0.2815
N550 G00 X0.2542 Z0.069
N560 X0.2542 Z0.0
N570 G01 X0.1075 Z0.0
N580 X0.1075 Z-0.031
N590 G02 X0.1218 Z-0.0395 I-0.0315 K-0.2815
N600 G00 X0.2399 Z0.0786
N610 X0.2399 Z0.0
N620 G01 X0.0932 Z0.0
N630 X0.0932 Z-0.0236
N640 G02 X0.1075 Z-0.031 I-0.0315 K-0.2815
N650 G00 X0.2256 Z0.0871
N660 X0.2256 Z0.0
N670 G01 X0.0789 Z0.0
N680 X0.0789 Z-0.0171
N690 G02 X0.0932 Z-0.0236 I-0.0315 K-0.2815
N700 G00 X0.2113 Z0.0945
N710 X0.2113 Z0.0
N720 G01 X0.0647 Z0.0
N730 X0.0647 Z-0.0116
N740 G02 X0.0789 Z-0.0171 I-0.0315 K-0.2815
N750 G00 X0.197 Z0.101
N760 X0.197 Z0.0
N770 G01 X0.0504 Z0.0
N780 X0.0504 Z-0.007
N790 G02 X0.0647 Z-0.0116 I-0.0315 K-0.2815
N800 G00 X0.1828 Z0.1065
N810 X0.1828 Z0.0
N820 G01 X0.0361 Z0.0
N830 X0.0361 Z-0.0031
N840 G02 X0.0504 Z-0.007 I-0.0315 K-0.2815
N850 G00 X0.1685 Z0.1112
N860 X0.1685 Z0.0
N870 G01 X0.0218 Z0.0
N880 G02 X0.0361 Z-0.0031 I-0.0315 K-0.2815
N890 G00 X0.1542 Z0.115
N900 X0.2504 Z0.115
N910 X0.2504 Z0.0
N920 X-0.0315 Z0.0
N930 G41
N940 G02 X0.25 Z-0.2815 I-0.0315 K-0.2815
N950 G01 X0.25 Z-0.5315
N960 M05 M30

[BrassBuilder]

Here is the screen that I see in Mach3.
Mike

[BrassBuilder]

I tried reinstalling the program on a different computer. Same results. I still get the line starting at N140 with the circles.

Anything else that I can try?

Mike

[BrassBuilder]

Andre,
Is the T_Mach3Rcss.ppr post that you are using the same one that is on the download page on the Dolphin site? Just curious if maybe I have a different version of the post.
Mike

[andre-dolphin]

I have attached a zip file that contains the .cnc, .pun files and the post I have been using.

See what results you get, if they differ I can only think that it's a setting in mach3 - I haven't setup mach to actually run a machine. I just use it to test gcodes.

IJ mode in Config is set to Abs.

ATB
Andre

[Hood]

It will either be your IJ mode or that you need to select reversed arcs in front toolpost, you will find the latter in Config menu then Ports and Pins then Turn Options.
Hood