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Messages - Graham Waterworth

1851
G-Code, CAD, and CAM discussions / Re: Gcoding a G31 probing Polar array
« on: November 03, 2007, 08:32:42 PM »
Hi Terry,

Looks ok, is it working?

Graham.

1852
General Mach Discussion / Re: Front & rear toolposts in Machturn
« on: November 03, 2007, 06:25:49 PM »
Interesting code,  very compact,

Graham.

1853
G-Code, CAD, and CAM discussions / Re: Gcoding a G31 probing Polar array
« on: November 03, 2007, 03:31:05 PM »
Hi Terry,

These are off the top of my head, give them a try, you never know they may just work.

Graham.


%
O0001 (PROBE MACRO IN TO OUT)
G40 G40 G00 G90 X0 Y0
T1 M6
#1=720  (number of steps)
#2=5.25 (radius)
#3=0  (start angle)
#4=[360/#1]
#5=#3
G00 Z1.
X0 Y0
Z-.1
(OPEN FILE FOR STORING POINTS)
M98 P0002 L#1
(CLOSE FILE FOR STORING POINTS)
G00 Z1.
M30

O0002 (IN TO OUT SUB)
#5=[#5+#4]
#6=[sin[#5]*#2]
#7=[cos[#5]*#2]
G31 X#6 Y#7 F10.
(READ STOP POINT and store it)
G00 X0 Y0
M99
%



%
O0003 (PROBE MACRO OUT TO IN)
G40 G40 G00 G90 X0 Y0
T1 M6
#1=720  (number of steps)
#2=5.25 (radius)
#3=0  (start angle)
#4=[360/#1]
#5=#3
G00 Z1.
X0 Y0
Z-.1
(OPEN FILE FOR STORING POINTS)
M98 P0004 L#1
(CLOSE FILE FOR STORING POINTS)
G00 Z1.
M30

O0004 (OUT TO IN SUB)
#5=[#5+#4]
#6=[sin[#5]*#2]
#7=[cos[#5]*#2]
G00 G90 X#6 Y#7
G31 X0 Y0 F10.
(READ STOP POINT and store it)
M99
%


1854
Hi Harry,

Producing G-code in most cases takes 3 steps, sometimes 4 steps.

3 step method :-

1. You draw the part in a CAM system. It can be a 2D or 3D system

2. Create tool paths. This is where you tell the system what tools to use on what part of the job.

3. Post process it into G-code,  the post processor is a way of converting the internal tool paths of the CAM system into a g-code file format that a particular controller needs. E.g. Mach 3

On the 4 step systems, the part is drawn in a CAD system and then imported into the CAM system. The import format can be DXF for 2D and IGES for 3D. Then it is as the 3 step system.

Graham.




1855
General Mach Discussion / Re: Large circle problem
« on: November 03, 2007, 11:06:12 AM »
I am just in the middle of a re-write, I was asked by one of the model engineering mags to do a 12 to 24 month CNC set up and programming tutorial, it has to cover milling and lathe work with working examples for each issue. Starting off simple and working up to complex parts.  It is going to be much better than the original.

Graham.

1856
General Mach Discussion / Re: Large circle problem
« on: November 03, 2007, 04:58:40 AM »
Hi,

sorry to say its your code that,s wrong, your machine is probably fine, try this code.

%
N100 G20
N102 G0 G17 G40 G49 G80 G90
N104 T239 M6
N106 G0 G90 X12.234 Y-.3823 S1069 M3
N108 H239 Z2.
N110 Z.35
N112 G01 Z-0.005 F6.42
N114 G03 X0. Y12.24 R12.24 F10.
N116 X-12.234 Y-0.383 R12.24
N118 G1 Z.095 F6.42
N120 G0 Z2.
N122 M5
N124 G0 X0. Y0.
N128 M30
%

Graham.

1857
Forum suggestions and report forum problems. / Re: Need Help
« on: November 02, 2007, 10:28:48 AM »
go to config, set native units.

Graham.

1858
Funny, it works for me,  search "Millwrite 2000" in Google and it should be the first one.

Graham.

1859
Alex,

have a look at this software, it is very easy to use and is made to do just what you want.

Graham.

http://members.aol.com/m9685123/index.html

1860
Hi PatM,

interesting videos,  what software did you use to produce the PCB layout?

Graham.