Messages

2161

G-Code, CAD, and CAM discussions / Re: Current point same as end point alarm

« on: March 26, 2007, 07:13:49 PM »

It looks the same but its not.

G03 with an R calculates an arc from where you are now to the end point

G03 with an I,J is an offset from the current point.

Your first bit of code is already at the end point so can't calculate an end point

Your second bit of code just moves by the I amount.

The R command in a G02/03 can not do more than 180 degrees.

If you are trying to mill a hole you can do :-

G00 X-5.378 Y-3.25 Z.1
G01 Z-.38 F2.
X-5.506 F3.937
G03 I.128
G00 X-5.378
G00 Z.1

This will do a full 360 cut.

Graham.

2162

Tangent Corner / Just for fun, don't go and make one

« on: March 26, 2007, 10:44:55 AM »

Somebody sent me this, it looks like a great design.

Graham.

2163

General Mach Discussion / Re: mastercam x

« on: March 18, 2007, 05:50:15 AM »

Fanuc 6 or 11 post is normally ok.

Graham.

2164

Newfangled Solutions Mach3 Wizards / Re: Strange toolpath !

« on: March 17, 2007, 05:55:25 AM »

I don't use the NFS programs so I can't check it but it looks like a cutter compensation error to me, can you change the lead in/out options.

Graham.

2165

G-Code, CAD, and CAM discussions / Re: write my own gcode

« on: March 16, 2007, 08:17:08 PM »

I have sent you a PM

Graham.

2166

G-Code, CAD, and CAM discussions / Re: write my own gcode

« on: March 16, 2007, 07:52:08 PM »

Hi Bob,

what formats will the software export?

Graham.

2167

General Mach Discussion / Re: changing offsets and keeping z value?

« on: March 16, 2007, 03:27:24 PM »

It sound as if you should be looking at something like this:-

http://www.coventrytoolholders.co.uk/pdfs/page103.pdf

Graham.

2168

General Mach Discussion / Re: changing offsets and keeping z value?

« on: March 16, 2007, 04:49:16 AM »

You are going about this the wrong way.

In Mach you have 6 global datums and 1 local datum, the global datums are G54,G55,G56,G57,G58 & G59 the local one is G52.

If you have 4 boards to you can set each with its own global datum.

The boards can be in any position on the table and they don,t have to be at the same height  e.g. different vices.

You set your datums for each block at the same point then the code you have will work if you add the G54 or G55 into the code in the correct place.

You set the tool offsets as if you are working on one part.

The code is like this :-

G21 G40 G80 G17


N1 (TOOL 1 ROUGH MILL)
T1 M6
G54 G00 G90 G43 X0 Y0 Z25. S1000 M3
Z1. M8
G52 X10.Y5.
X1.
Y3.
G52 X0 Y0
etc.

G55 X0 Y0 Z25.
Z1 M8
G52 X10.Y5.
X1.
Y3.
G52 X0 Y0
etc.

G56 X0 Y0 Z25.
Z1 M8
G52 X10.Y5.
X1.
Y3.
G52 X0 Y0
etc.

G57 X0 Y0 Z25.
Z1 M8
G52 X10.Y5.
X1.
Y3.
G52 X0 Y0
etc.
G91 G28 Z0 M6
M1


N2 (TOOL 2 FINISH MILL)
T2 M6
G54 G00 G90 G43 X0 Y0 Z25. S1500 M3
Z1. M8
G52 X10.Y5.
X1.
Y3.
G52 X0 Y0
etc.

G55 X0 Y0 Z25.
Z1 M8
G52 X10.Y5.
X1.
Y3.
G52 X0 Y0
etc.

G56 X0 Y0 Z25.
Z1 M8
G52 X10.Y5.
X1.
Y3.
G52 X0 Y0
etc.

G57 X0 Y0 Z25.
Z1 M8
G52 X10.Y5.
X1.
Y3.
G52 X0 Y0
etc.
G91 G28 Z0 M6
M30

Graham.

2169

General Mach Discussion / Re: Problem with the circle

« on: March 15, 2007, 07:47:46 PM »

Are the scaling values set to 1.000?

Are the circles round?

If you mill a 25mm square is it size and square?

Graham.

2170

General Mach Discussion / Re: changing offsets and keeping z value?

« on: March 15, 2007, 07:39:03 PM »

If you are not changing tool, the only way you can do that safely is by having the same z value in both offsets.

What are you trying to do?

Graham.