getting ready to pull my hair out!!!

[bherr]

I'm a newbee to machining so I realize that there is a learning curve,but for the life of me I can't figure this one problem out. I finally got the machine to run via the MACH III and BobCad sofware, but here's the problem I have now. In bobCad I can do an offset for the toolpath, simulate and the simulation show the tool cutting the exact dimension. I save the G-code and then import it into Mach III. I've setup the tools and worked with Dan at Camtronics to setup the conf files etc. So now I load the g-code into Mach III and turn the machine on and engage the motors. I bring the table to 0 and set the part centered on the X,Y and leave the tool about 1.5 " above the part, becasue I want to make sure it mills correctly. Hit the run button and the tool comes down and begins running the toolpath, except it doesn't even come close to milling the arc diameter I've loaded. I've double checked everything I can think of,no luck. Can anyone HELP me????????

I'm running the Tri-Power full CNC

thanks
ben

[Pres]

Post your machine program code so we can look at it.
Otherwise, we have nothing to go by.

[shovelitdeep]

check to make sure that your cutter comp is set the way the controller expects it. You can have comp left, right, or center, and many cam programs can do any of them. When comp is generated you will need to put the diameter or radius into the comp table on the machine. the catch is now, that the cam can be programming to the center of the tool, which will require a zero in the comp table, but it still uses the g41-42 for comp. this is to allow a comp of a few thousandths +/- to compensate for tool wear and flex. If you have the diameter or radius put into the table, the pockets and profiles will be off by that amount.
Good luck
Rich

[ger21]

To me it souns like your I,J settings may be incorrect. Try changing them in Config>State.

[shovelitdeep]

That is an even better possibility, wish I'd thought of it.
Rich