Messages

1521

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

1522

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

1523

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.

1524

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

1525

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

1526

General Mach Discussion / Re: Ballscrew mapping

« on: October 22, 2008, 03:40:48 PM »

Laser calibration is the best, lots of companies do it now, try google.

Graham

1527

General Mach Discussion / Re: Cutter Compensation

« on: October 22, 2008, 02:09:26 PM »

Hi Sage,

Looking at your code I think it is at fault.

Post a sketch of your part along with the dimensions and I will code you a program and lets see if it works, what cutter size are you using.

Graham

1528

General Mach Discussion / Re: Cutter Compensation

« on: October 22, 2008, 12:05:15 PM »

Hi Sage,

do you have CV (G64) set to on, if so that will cut the corners off and change the path, set your finish path to exact stop (G61) and run the code again. This will make Mach stop on corners and produce sharp angles.

Graham

1529

General Mach Discussion / Re: Cutter Compensation

« on: October 22, 2008, 03:54:13 AM »

Hi Bsharp,

It is normal on most systems to have to issue a G40 before re-running a program that uses comp.

That said, hang in there, I was discussing this very issue with Brian while he was over here in the UK, I should not be telling you this but cutter comp is to get a rewrite on his return to the US. 

This was all achieved with the power of good quality hand pulled beer 

Graham

1530

G-Code, CAD, and CAM discussions / Re: Newbie questions about circle pocket cutting

« on: October 21, 2008, 04:15:58 PM »