Messages

6001

General Mach Discussion / Re: Cutter Compensation - Help please

« on: August 19, 2007, 09:19:02 AM »

Thank you. I'll try it. The lead in & lead out were already there (I think). The router goes to this position & plunges before the first cut ;
N0130 X-325.5000 Y231.0000
N0150 G00 Z0.0000
N0160 Z-15.0000

No, that's not a lead in move. See the attached pic for the lead-in and lead out move I added. Comp can not be added correctly (if at all, not sure) during a plunge move. Comp is applied from the point before the G41 (Tool center is at that location) to the position after the G41.

You can't use G41 T1, it must be G41 D1 for tool #1. You can also use G41 Px.xx, where x.xx is the tool radius. Or you can just use G41 and Mach will use the current tool.

Here's a sample with an inside cut and an outside cut which will hopefully clear things up for you.

One last thing. You technically don't need a lead out move, but I like to use it. If you don't, the tool will "jump" when comp is turned off. The lead out move gets the center of the tool back to the commanded position during the move, not abrubtly if you just turn off comp without it.

And yes, Id program sheetcam without the offsets, and manually add the leadin and leadout myself, as well as the G41. Unless sheetcam can do it. I don't use it, so I don't know.

6002

General Mach Discussion / Re: Cutter Compensation - Help please

« on: August 19, 2007, 01:03:06 AM »

YOUr original code had offsets applied by sheetcam, and wasn't using comp. To use comp, you'd need g-code without the comp applied. Not sure if I offset the correct amount, but try this. I added leadin and leadout moves. the D in the G41 line is the tool #. it will use the tool diameter from the tool table. I think you can also remove the D and it will use the current tools' diameter. There may be some mistakes here, but it should give you the idea of how it works.


G21
G40 G90
M3 S500
G0 Z40
G0 X-336.0719 Y233.1693 Z0.1250
G1 X-336.0719 Y233.1693 Z0.0000 F500
G41D1
G1 X-331.0243 Y228.5000 Z-15.0000 F1500
G1 X122.0970 Y228.5000 Z-15.0000
G2 X124.6969 Y227.7707 Z-15.0000 I-0.0003 J-4.9998
G1 X328.0991 Y103.9605 Z-15.0000
G2 X330.5000 Y99.6897 Z-15.0000 I-2.5993 J-4.2715
G1 X330.5000 Y-99.6900 Z-15.0000
G2 X328.0993 Y-103.9544 Z-15.0000 I-4.9980 J0.0057
G1 X124.6952 Y-227.7657 Z-15.0000
G2 X122.0951 Y-228.5000 Z-15.0000 I-2.6084 J4.2657
G1 X-325.1264 Y-228.5000 Z-15.0000
G2 X-328.5000 Y-223.5496 Z-15.0000 I1.6215 J4.7298
G1 X-328.5000 Y-216.0000 Z0.0000
G1 X-328.5000 Y-137.0000 Z0.0000
G2 X-323.5000 Y-132.0000 Z0.0000 I5.0000 J0.0000
G1 X-265.5000 Y-132.0000 Z0.0000
G3 X-265.5000 Y-122.0000 Z0.0000 I0.0000 J5.0000
G1 X-323.5000 Y-122.0000 Z0.0000
G2 X-328.5000 Y-117.0000 Z0.0000 I0.0000 J5.0000
G1 X-328.5000 Y-73.5000 Z0.0000
G2 X-323.5000 Y-68.5000 Z0.0000 I5.0000 J0.0000
G1 X-283.5000 Y-68.5000 Z0.0000
G3 X-283.5000 Y-58.5000 Z0.0000 I0.0000 J5.0000
G1 X-323.5000 Y-58.5000 Z0.0000
G2 X-328.5000 Y-53.5000 Z0.0000 I0.0000 J5.0000
G1 X-328.5000 Y53.5000 Z0.0000
G2 X-323.5000 Y58.5000 Z0.0000 I5.0000 J0.0000
G1 X-283.5000 Y58.5000 Z0.0000
G3 X-283.5000 Y68.5000 Z0.0000 I0.0000 J5.0000
G1 X-323.5000 Y68.5000 Z0.0000
G2 X-328.5000 Y73.5000 Z0.0000 I0.0000 J5.0000
G1 X-328.5000 Y117.0000 Z0.0000
G2 X-323.5000 Y122.0000 Z0.0000 I5.0000 J0.0000
G1 X-265.5000 Y122.0000 Z0.0000
G3 X-265.5000 Y132.0000 Z0.0000 I0.0000 J5.0000
G1 X-323.5000 Y132.0000 Z0.0000
G2 X-328.5000 Y137.0000 Z0.0000 I0.0000 J5.0000
G1 X-328.5000 Y216.0000 Z0.0000
G1 X-328.5000 Y223.5000 Z0.0000
G2 X-323.5000 Y228.5000 Z-15.0000 I5.0000 J0.0000
G3 X-317.5000 Y234.5000 Z-15.0000 I0.0000 J6.0000
G40
G1 X-317.5000 Y234.5000 Z-15.0000
G0 X-317.5000 Y234.5000 Z0.1250
G0 X0 Y0
M5
M30

6003

Third party software and hardware support forums. / Re: Text in dxf into LazyCam

« on: July 15, 2007, 04:00:47 PM »

If you installed the Express tools (included with AutoCAD, but optional to install), Use text explode under the express menu.

6004

General Mach Discussion / Re: Cutter comp

« on: July 05, 2007, 05:08:50 PM »

The D is only used with/for G41/G42. You still call the tool with a T for the tool change.

6005

General Mach Discussion / Re: Cutter comp

« on: July 04, 2007, 10:26:41 PM »

When cutter comp is called (G41/G42), you can specify the tool # (G42 D1 for tool #1) or tool radius (G42 P0.25 for a 1/2" diameter tool). If neither is specified, Mach should use the current tool radius for the offset.

6006

Forum suggestions and report forum problems. / Re: Absolute coordinates in G2/G3 circular interpolation

« on: July 04, 2007, 10:23:30 AM »

You can also change the default IJ mode in the general config screen.

6007

LazyCam (Beta) / Re: G-Code line limitation???

« on: June 23, 2007, 09:51:48 AM »

Mach3's limit is 1000 lines of code. Have not heard of any limit in LazyCAM.

6008

VB and the development of wizards / Re: Oscillative Movement

« on: June 20, 2007, 09:29:46 PM »

The software we use at work ( www.cadcode.com) adds it in the g-code when it processes .dxf files.

6009

General Mach Discussion / Re: Digitizing

« on: June 08, 2007, 09:36:32 PM »

I am attaching the point cloud file for FDR's ear on the front of the dime. That is the one that I posted an image of earlier in this thread -- there is a giant pimple on FDR's ear lobe where an error occurred (a false surface detection). The area of this scan is (if I remember right) 0.12" by 0.12" and I had to scale it all up in order to work with it. I don't know if it will work with whatever you try to do with it.

Is this done with the digitise wizard? My AutoCAD macro doesn't like it. All the sample files I had when I wrote the macro had a line that yours doesn't, at each direction change.

Here's a few lines of your point cloud.

0.10000,0.00000,-0.01087
0.10200,0.00000,-0.01087
0.10400,0.00000,-0.01087
0.10600,0.00000,-0.01087
0.10800,0.00000,-0.01087
0.11000,0.00000,-0.01087
0.11200,0.00000,-0.01087
0.11400,0.00000,-0.01087
0.11600,0.00000,-0.01084
0.11800,0.00000,-0.01081

My macro is looking for this line
0.12000,0.00000,x.*********xx

you go to this line
0.12000,0.00200,-0.01081
0.11800,0.00200,-0.01081
0.11600,0.00200,-0.01081

It appears that you're skipping a point each time you change direction.

6010

LazyCam (Beta) / Re: OK, I give up! How do I get ACAD dxf files to open in LCAM 2.02?

« on: June 08, 2007, 09:23:53 PM »

No splines, but it's all 3D polylines, which LazyCAM probably doesn't like. This might help you out.