Messages

1531

General Mach Discussion / Re: Smooth Stepper

« on: October 28, 2008, 03:43:28 PM »

Groom Lake
Area 51

I think 

Graham

1532

General Mach Discussion / Re: What was upgraded in R3.042.015

« on: October 26, 2008, 06:12:30 AM »

Cutter comp is at the top of the to do list according to Brian.

Graham

1533

General Mach Discussion / Re: Cutter Compensation

« on: October 26, 2008, 05:51:55 AM »

It's cutter comp, not comp / pocketing / magic bad code correction.

It's hard enough to just get it to offset correctly. Comp shouldn't try to decide what I'm trying to do, it should just offset the coded path. That's it.

Yea but look at the picture in my last post. It did it wrong. I gave my Opinion on how to make it work correctly. What is yours?

I am afraid you did it wrong,  there are rules with any form of machining e.g. you have to drill the hole before you can tap it.

Well tool radius compensation is the same.

The golden rule is that the tool must always travel in the same direction tangent to the part, it must never reverse its direction, this means when you are working with angles less than 90 degree the point must have a tiny rad on the end, if not the path stops and the direction is reversed.

Graham

1534

Tangent Corner / Re: Just for laughs

« on: October 25, 2008, 05:58:37 PM »

It made me laugh, lots and lots and lots.

Very Funny

Graham

1535

General Mach Discussion / Re: Cutter Compensation

« on: October 25, 2008, 05:07:53 PM »

Hi Guys

after much experimenting I now have the same fault as you do, the difference was I was running Mach in Metric and entering metric values e.g. .02mm , running it in inches gives the same fault.

I am in contact with Brian about this, so we will see what he has to say.

Graham

1536

General Mach Discussion / Re: Cutter Compensation

« on: October 24, 2008, 12:59:55 PM »

Hi guys,

even setting the tool dia to .005" on my system the path is perfect, I have Mach set to G61 (exact stop mode) if I set it to G64 (CV mode) I get rounded and miss formed profiles.

O0001 (SAGE BUSHING)

G20 G40 G00 G80 G17
G61

N1 (FLAT -  1-8 IN DIA)
T1 M6
G00 G90 G43 X0 Y0.569
Z0.1
S4500 M3
Z0.05
G01 Z0 F2.
M98 P0002 L19
G00 Z1.
G91 G28 Y0 Z0
M30
 
O0002 (CONTOUR SUB)
G91
G01 Z-.02 F2.
G90
G41 D1 X-0.141 F8.
Y0.491
G03 X0. Y0.35 R0.141
G01 X0.217
G02 X0.392 Y0.175 R0.175
X0.217 Y0. R0.175
G01 X0.
Y0.35
G03 X0.141 Y0.491 R0.141
G01 G40 Y0.569
X0
M99

Graham

1537

General Mach Discussion / Re: Cutter Compensation

« on: October 24, 2008, 06:19:49 AM »

The code I posted is commanded on the cutter centre line NOT an offset path, so to run the same cutter round to take a small amount more off you would change the cutter dia in the offset table from .125 to .105 and this would then remove another .02" from the part.

Graham

1538

General Mach Discussion / Re: Cutter Compensation

« on: October 23, 2008, 02:32:15 PM »

This is how I would do your job :-

The green is the job, the blue is the cutter path.

1539

General Mach Discussion / Re: Cutter Compensation

« on: October 23, 2008, 10:00:52 AM »

Or go and download Screen Hunter, its free and works great, many here use it.

http://www.wisdom-soft.com/sh/sh_free.htm

Graham

1540

General Mach Discussion / Re: Cutter Compensation

« on: October 23, 2008, 03:49:26 AM »

Go to additional options below left of the reply box and use the attach box.

Graham