[CharlieM]

There must be an easier way!!!!!!


G01 X-.1602 Y.2309 F5
G01 Z-.250 F.75
G02 X-.1875 Y.2970 I-.0938 J.2970
G01 X-.1875 Y.5863
G02 X-.1086 Y.6789 I-.0938 J.5863
G02 X.1086 Y.6789 I.0000 J.0000
G02 X.1875 Y.5863 I.0938 J.5863
G01 X.1875 Y.2970
G02 X.0602 Y.2309 .0938 J.2970

G01 X.1701 Y.2237
G02 X.2245 Y.2701 I.2535 J.1809
G01 X.4997 Y.3595
G02 X.6121 Y.3130 I.5286 J.2703
G02 X.6792 Y.1056 I.0000 J.0000
G02 X.6155 Y.0029 I.5866 J.0920
G01 X.3404 Y-.0865
G02 X.2691 Y-.0810 I.3115 J.0026

G01 X.2653 Y-.0926
g02 X.3263 Y-.1301 I.2504 J-.1852
G01 X.4963 Y-.3641
G02 X.4869 Y-.4854 I.4205 J-.4192
G02 X.3112 Y-.6130 I.0000 J.0000
G02 X.1929 Y-.5845 I.2688 J-.5294
G01 X.0229 Y-.3505
G02 X.0061 Y-.2810 I.0987 J-.2954

G01 X-.0061 Y-.2810
G02 X-.0229 Y-.3505 I-.0987 J-.2954
G01 X-.1929 Y-.5845
G02 X-.3112 Y-.6130 I-.2688 J-.5294
G02 X-.4869 Y-.4854 I.0000 J.0000
G02 X-.4963 Y-.3641 I-.4205 J-.4192
G01 X-.3263 Y-.1301
G02 X-.2653 Y-.0926 I-.2504 J-.1852

G01 X-.2691 Y-.0810
G02 X-.3404 Y-.0865 I-.3115 J.0026
G01 X-.6155 Y.0029
G02 X-.6792 Y.1065 I-.5866 J.0920
G02 X-.6121 Y.3130 I.0000 J.0000
G02 X-.4997 Y.3595 I-.5286 J.2702
G01 X-.2245 Y.2701
G02 X-.1701 Y.2237 I-.2535 J.1809

G01 Z.0000 F5
G01 X.0000 Y.0000
M30

[gar]

080213-0824 EST USA

I do not want to reverse engineer your code to figure out what you are doing.

A drawing or picture of the part and a verbal description of how you are currently doing this would help.

Not nearly enough code to be doing 3D surfacing.

.

[CharlieM]

This is not a 3D surface. I cut this little 5 blade fan from a piece of sheet metal and then bent the blades to catch the air.

My real question is, is there a way to write the program for 1 blade and then "pattern" the other 4 ?

I have already done this and it took me nearly 2 hours to write this code!

[CharlieM]

Let's see if I can post a picture.

[CharlieM]

ALLRIGHT, I did it !!!!

See the little fan? I cut that one out manually, about 10 years ago. I was running the engine fast one day and the little fan came apart!!!

So, I cut a 5 blade fan out last weekend. This one was made from stainless steel and of a stronger design.

[Mike Stevenson]

CharlieM,

Your program is very short. Why do you need to condense it any more?

There is a way to rotate and repeat the one blade but you would need some sort of programming system for that.

Or you could take out your calculator and use the cartesian to polar coordinate conversion function to manually calculate the rotated numbers.

[CharlieM]

The engine has a little fan to cool the head.

(Or you could take out your calculator and use the cartesian to polar coordinate conversion function to manually calculate the rotated numbers.)

This is what I am talking about, I just don't know how.

[gar]

080213-0859 EST USA

CharlieM:

Does your CNC have a rotation option?

If so create the path for for one blade, and put this in a subroutine (not absolutely necessary to be in a sub, but conceptually it is easier). I prefer to write in absolute. Put your origin for the subroutine code at the center of the fan.

The main body of your code will

call the sub
rotate 360/5 = 72 deg
call the sub
rotate to 144 deg
call the sub
etc.

This can also be done in a loop.

.

[CharlieM]

My CNC is a "Home Built" desk top design. I run the stepper drivers with a program called "Master 5", all I know is; "Master 5" can read G-Code.

I had to hunt and cordinate every single destany in the above program! My question is how can I do it once and "pattern" the blade 4 more times?

[gar]

080213-1005 EST USA

Is rotation one of your G-code functions?

See the HAAS manual, G68.
http://www.haascnc.com/customer_serv...mc/96-8000.pdf
This is a 13 megabyte file. Save it for future reference.

.

[Andre' B]

Near as I can tell Master 5 is the original version of the Mach control software. Unlikly it knows what a G68 is.

http://www.machsupport.com/artsoft/p...s/products.htm

I tryed plotting the above code and got arc errors and nothing that looked like a fan.

Upload a DXF of the outline and ask nice and maybe someone will make a quick toolpath for you.

[CharlieM]

Thank you Andre'B, I have already cut this little fan out.

I wrote 2 programs to do it,

1. from the center of a disk, I drilled 5 .125 holes.

2. manually changed to a 1/16" end mill and used the above program to cut out the 5 blades.

"Master 5" did it for me, no problem.

I tried to use Kelly ware ~ KCam but the program would only show 3 blades !!!!???

You could up-load KCam and see what the fan looks like, except it will be missing 2 blades!!

I am just trying to learn something here,

[CharlieM]

I found that arc error, "Master 5" ignored it and cut it out anyway!

attached it the tool path in DFX

[Andre' B]

Here is the code I got using some CAM software with your DXF file.

Note, that I had to trim all the end points of the arcs on the blade tips so that the end of one arc was in the same place as the start of the next arc. For some reason some of them were off by 0.00003" which is enough to mess up some CAM software. Your Master 5 software is probably ignoring the small differences.

G00 X-0.1651 Y0.2273
G01 Z-0.250 F0.75

G01 X-0.1602 Y0.2309
G02 X-0.1875 Y0.2970 I0.0664 J0.0661
G01 X-0.1875 Y0.5863
G02 X-0.1086 Y0.6788 I0.0937 J0.0000
G02 X0.1086 Y0.6788 I0.1086 J-0.6788
G02 X0.1875 Y0.5863 I-0.0148 J-0.0925
G01 X0.1875 Y0.2970
G02 X0.1602 Y0.2309 I-0.0937 J0.0000
G01 X0.1701 Y0.2237
G02 X0.2245 Y0.2701 I0.0834 J-0.0427
G01 X0.4997 Y0.3595
G02 X0.6120 Y0.3131 I0.0290 J-0.0891
G02 X0.6792 Y0.1065 I-0.6120 J-0.3131
G02 X0.6155 Y0.0029 I-0.0926 J-0.0145
G01 X0.3404 Y-0.0865
G02 X0.2691 Y-0.0810 I-0.0290 J0.0891
G01 X0.2653 Y-0.0926
G02 X0.3263 Y-0.1301 I-0.0149 J-0.0925
G01 X0.4963 Y-0.3641
G02 X0.4869 Y-0.4853 I-0.0758 J-0.0551
G02 X0.3111 Y-0.6130 I-0.4869 J0.4853
G02 X0.1929 Y-0.5845 I-0.0424 J0.0836
G01 X0.0229 Y-0.3505
G02 X0.0061 Y-0.2810 I0.0758 J0.0551
G01 X-0.0061 Y-0.2810
G02 X-0.0229 Y-0.3505 I-0.0926 J-0.0144
G01 X-0.1929 Y-0.5845
G02 X-0.3111 Y-0.6130 I-0.0758 J0.0551
G02 X-0.4869 Y-0.4853 I0.3111 J0.6130
G02 X-0.4963 Y-0.3641 I0.0664 J0.0662
G01 X-0.3263 Y-0.1301
G02 X-0.2653 Y-0.0926 I0.0758 J-0.0551
G01 X-0.2691 Y-0.0810
G02 X-0.3404 Y-0.0865 I-0.0423 J0.0836
G01 X-0.6155 Y0.0029
G02 X-0.6792 Y0.1065 I0.0290 J0.0891
G02 X-0.6120 Y0.3131 I0.6792 J-0.1065
G02 X-0.4997 Y0.3595 I0.0834 J-0.0427
G01 X-0.2245 Y0.2701
G02 X-0.1701 Y0.2237 I-0.0290 J-0.0891
G01 X-0.1651 Y0.2273

G00 Z1.000
G00 X0Y0
M30

[Andre' B]

Have a look at this thread for info on free software to go from drawings to GCode.

http://www.cnczone.com/forums/showpo...7&postcount=11