Messages

1361

G-Code, CAD, and CAM discussions / Re: Sub within a Sub ?

« on: April 29, 2009, 06:40:16 PM »

Have a look at this thread :-

Graham

http://www.machsupport.com/forum/index.php/topic,310.msg1603.html#msg1603

Or this one

http://www.machsupport.com/forum/index.php/topic,1551.msg8780.html#msg8780

1362

G-Code, CAD, and CAM discussions / Re: Any cheap alternatives to Vectric?

« on: April 24, 2009, 03:49:53 AM »

No equivalent, lots of cheep or free stuff listed in the links page, go to Resources at the top of the forum.

Graham
 

1363

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

« on: April 22, 2009, 03:23:38 AM »

If you are +-.003 over 5" then over the 24" travel of the machine you can be .040" out and dimensions will not be consistent.  It must be and can be spot on.

Try putting the calculated figures in again.  When you change a steps per setting you should restart Mach3 and then do your checks, if you are not doing that that may be why you are getting strange results.

Graham

1364

General Mach Discussion / Re: Muti-start threading....

« on: April 21, 2009, 03:52:27 AM »

This is the type of thing I use, this one if for internal.

http://cgi.ebay.co.uk/Set-of-Metric-Internal-Lathe-Threading-Tools-16mm-Shank_W0QQitemZ270292113705QQcmdZViewItemQQptZUK_Home_Garden_PowerTools_SM?hash=item270292113705&_trksid=p3286.c0.m14&_trkparms=72%3A1688|66%3A2|65%3A12|39%3A1|240%3A1318

And this is external.

http://cgi.ebay.co.uk/Index-A-Seiki-Lathe-Threading-Tool-16ER-inserts_W0QQitemZ250407563521QQcmdZViewItemQQptZLH_DefaultDomain_3?hash=item250407563521&_trksid=p3286.c0.m14&_trkparms=72%3A1688|66%3A2|65%3A12|39%3A1|240%3A1318

Graham

1365

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

« on: April 20, 2009, 04:42:56 PM »

Try setting your steps to 509.090909 and try again.

Graham

1366

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

1367

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
 

1368

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

1369

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

1370

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