Messages

1161

G-Code, CAD, and CAM discussions / Re: Code help needed

« on: August 07, 2010, 03:31:20 AM »

The % denotes the start and end of a program file when using subs its better to have them in so you know you have a return on the end of the sub program.

Graham

1162

G-Code, CAD, and CAM discussions / Re: Code help needed

« on: August 06, 2010, 06:50:16 PM »

I would do it this way.

%
M6 T1
G43 H1
M03 S2500 
M8
G52 X0
M98 P2
G52 X2.
M98 P2
G52 X4.
M98 P2
G52 X6.
M98 P2
G52 X8.
M98 P2
G52 X10.
M98 P2
G52 X12.
M98 P2
G52 X14.
M98 P2
M9
M5
M30

O0002
G00 Z 1.00
Y -.6875         
X 0.003
Z-.130
G01 Y.6875 F5.0
Z-.130
X-0.003
Y-.6875
G00 Z.100
Y-3.0
Z - 1.0
G00 Z.1
G52 X0
M99
%

Graham

1163

G-Code, CAD, and CAM discussions / Re: Imsi Design Cad Arc Problem

« on: August 05, 2010, 12:43:29 PM »

Hi

I have not used that software but in a lot of cases if the arc becomes an oval or ellipse the dxf outputs is a spline and mach3 can not handle splines, if you look in the tools of the cad program you may find an option to convert splines to line segments or a convert to lines option on the dxf output.

Graham

1164

Show"N"Tell ( What you have made with your CNC machine.) / Re: 3D Printing.

« on: August 03, 2010, 01:19:08 PM »

From my observations of these machines I think the one that can make the part complete in one go with no fiddly support structures will be the winner, creating structures in fresh air has always been the sticking point for most methods, its only been in the last few years that the Zprinter and the like have really got it sorted.

http://www.thinglab.co.uk/printing_product.php?URL_=product_rapid_zcorp_zprinter_650&SubCatID_=66

Graham

1165

Show"N"Tell ( What you have made with your CNC machine.) / Re: 3D Printing.

« on: August 03, 2010, 07:44:05 AM »

Have you looked at this method ?

http://www.custompartnet.com/wu/laminated-object-manufacturing

1166

General Mach Discussion / Re: Mach 3 and the use of a CMM as an engraver

« on: August 03, 2010, 07:28:14 AM »

Most have ballscrews and linear scales for feedback and accuracy, your problem will be reading the scales for the measurements.

Most of the later ones also have a 3d model of the movement to compensate for position errors, twist and yaw.

Graham

1167

G-Code, CAD, and CAM discussions / Re: Beginners issues

« on: July 10, 2010, 06:55:47 AM »

Try the LazyCAM manual

http://www.machsupport.com/forum/index.php?action=dlattach;topic=12078.0;attach=16950

Graham

1168

General Mach Discussion / Re: worm gear cad design

« on: June 21, 2010, 07:52:31 AM »

this might be a good place to start :-

http://www.amazon.co.uk/Programming-CNC-Machines-Student-Workbook/dp/0831133171/ref=pd_cp_b_2

Or here

http://www.amazon.co.uk/CNC-Programming-Handbook-Peter-Smid/dp/0831133473/ref=pd_sim_b_2

Graham

1169

G-Code, CAD, and CAM discussions / Re: G-Code scaling program, mm to Inches and back

« on: June 20, 2010, 04:05:07 PM »

The file size has reduced by about 3600 characters this is because when you convert a mm size say 127.000 to inches you get 5. a saving of 5 characters multiply this by hundreds of conversions and the file shrinks by a large amount.

Have you found a fault in the converted file?

You can convert a DXF file in mm to inches by scaling it by 1:25.4th (0.03937) the metric cam system will think its a very small part but scale the tools too and the output will be inches, you will just need to change the G21 to G20.

Graham

1170

G-Code, CAD, and CAM discussions / Re: how do I do this?

« on: June 17, 2010, 06:28:00 AM »

Like this :-

%
o0001
g01 x5. f20. (feed at 20 inch per min)
m47 (repeat program from start)
%

Graham