Messages

1361

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 19, 2009, 07:38:47 PM »

I do not see how a G28.1 can fix your problem, all it is doing is homing the machine via an intermediate point X0.0015" etc.

If you change the X value to X-2. you will see what I am saying. The X axis will move 2" away from home and then home.

Have a look in your fixture offset table and see what is in G59.253 and above.

Graham

1362

General Mach Discussion / Re: Pocketing and Island avoidance issue, need help

« on: April 19, 2009, 07:24:52 PM »

If your axis is .010" out over a 5" distance then that is a long way out in cnc terms and will cause sizes to be inconsistent, you need a 5" command to move 5.000" before anything will work right.

Graham
 

1363

General Mach Discussion / Re: Still can not get part to cut same from mill and router

« on: April 19, 2009, 06:49:01 PM »

Please post your g-code.

Are outside shapes under size and inner shapes too big or what?

Graham

1364

General Mach Discussion / Re: Pocketing and Island avoidance issue, need help

« on: April 19, 2009, 06:25:10 PM »

I can only think its cutter rub that is causing the difference in size, have you tried running the feed and speed at a much higher rate?

Graham

1365

General Mach Discussion / Re: Pocketing and Island avoidance issue, need help

« on: April 19, 2009, 06:08:07 PM »

How much of the tool is sticking out of the collet/chuck, rule of thumb is 5 times dia max.

Graham

1366

General Mach Discussion / Re: Pocketing and Island avoidance issue, need help

« on: April 19, 2009, 05:58:18 PM »

what material are you cutting?

Graham

1367

General Mach Discussion / Re: Pocketing and Island avoidance issue, need help

« on: April 19, 2009, 01:35:06 PM »

Try this g-code, it pockets a .175 island in a 1" dia

See if it makes things the correct size.  Your sample code was cutting octagons not circles, was it meant to be like that.

Graham.

1368

G-Code, CAD, and CAM discussions / Re: cad-cam purchase?

« on: April 15, 2009, 08:50:47 PM »

CAM-BAM takes some beating for the price, its free

Graham

1369

General Mach Discussion / Re: Problem with cutting quality when turning

« on: April 13, 2009, 06:14:18 PM »

Check that the encoder is not loose on the shaft, you could also try swapping the x & z motor encoders over.

Graham

1370

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 11, 2009, 01:58:31 PM »

When you say you have a shift of .003 are we talking inches and is the position getting nearer to the home position every run?

Graham