On Thu, 15 Dec 2011, James Louis wrote: > Dan, > > I don't know if you are going to get much discussion here on this > fundamental topic. Your question is so complicated that it is usually > answered in CNC classrooms or CNC books with lots of diagrams. A text based > forum is a poor substitute for these. As far as You Tube is concerned, that > is also not the place to learn the fundamentals of tool length compensation > and cutter radius compensation and the relationships of CAM and CNC tool > tables. That's why you can't touch an industrial CNC machine without a > certification. At least not in a "for profit" shop. : ) > It will only lead to frustration if you rely on these for your clear > understanding of your tool "cribs". Also, a ballnose endmill is used for 3 > axis contouring, and I would not even attempt that until I had a solid > knowledge of 2 1/2 axis profiling, including tool table set-up in CAM and > CNC. I don't know your background so please don't take this wrong, but I do > know that there are better ways to get your questions answered than just > asking questions in a forum. > > Good luck > jim > -----Original Message----- > From: Dan Field [mailto:danfi...@roadrunner.com] > Sent: Thursday, December 15, 2011 3:01 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] tool table definitions > > On 12/15/2011 6:27 AM, andy pugh wrote: >> On 15 December 2011 14:06,<kqt4a...@gmail.com> wrote: >> >>> For example how to define a 1/8" ball nose mill >> If you want to automatically compensate for the ball-radius then I am >> afraid that you can't. EMC2 doesn't know enough about the material >> shape to compensate for ball-nose (or V) cutters. All EMC2 knows about >> is the cutter path, not what is being cut. That will always have to >> be handled by the CAM package. >> > I was or am hopeful there will be more discussion on this, I am in the > same boat trying understand the Tool Crib ( and it's relationship to the > CAM crib ) . So far I have got by but.... Now I thought the question > was just how to enter or define a 1/8" Ball Nose in EMC2 not auto > compensate. > > Agreed you set up your new tool in CAM. I sort of looked at any > existing examples and copied what was there changing the diameter and a > new Tool Number. I needed a 11/64 Ball Nose as that is what I had. > There was a 6 mm Ball Nose already setup. > > I saw that for a Ball Nose, Flat Radius is zero, corner radius is half > the tool diameter so that's what I did. Got a new tool number and sure > enough EMC2 error msg, no Tool # 15. So into the EMC crib, I only told > it Tool # 15, filled in Diameter and in comment what it was. That's it > and it seems to work just fine. > > So now I wonder why there is even a Tool Crib in EMC? I assume if you > are good enough to manually enter Gcode and run from there you need tools. > > That being said, I am using HeeksCNC for my CAM. There's not a lot of > help for the noob so I watch any youtube vids I can find. This one > mentions though I don't seem to have this option , EMC2 CRC and he > calls it Cutter Compensation. I only have a choice built in of EMC2, > and EMC2 Simplified ( using Simplified ) , no EMC2 CRC. I know if > you know what you are doing you can teach Heekscnc any Postprocessor , > don't know if this CRC is a Plug In or what. > > http://www.youtube.com/watch?v=TcMmKdtjX7w > > Hope this helps >
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