I machined the trigger group in an AR-15 receiver using my manual mill. I bought 5 AR- 15 receiver blank forgings and would like to machine them with my CNC mill. I have a solid model IGES file that has all the geometry I need to machine the part. The problem is when I try to machine the surfaces that are at an angle to the normal machined surfaces. If I could indicate the part in the vise at an angle, then I could machine it aligned to my 3 axis machine coordinates. So if I could manually rotate the part and indicate it in, then I think it would be possible to machine in 3 axis aligned to the 4th, 5th, and 6th axis that I don't have in reality. For my receiver I have machine top & bottom. left & right side, plus fore and aft, plus at least 2 parts at an angle to the other setups, and that's where the problem is. I guess I'm wanting 4 or 5 axis machining without 4 or 5 axis of motion, with the part manually positioned at the angle the CNC would like it positioned to machine.
RogerN -----Original Message----- From: jeremy youngs Sent: Friday, May 31, 2013 6:36 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Adjustable Kinnematics? g17,18,19 will select yor planes of motion then g91 will give the incremental move off, and i am uncertain what linuxcncs code for radians is . but im with andy if you only have 3 axis why? linear interpolation will do what you are asking if i understand correctl On Fri, May 31, 2013 at 4:56 AM, andy pugh <bodge...@gmail.com> wrote: > On 31 May 2013 07:24, RogerN <re...@wildblue.net> wrote: > > Let’s say, for example, you have a part that takes some machining at > some angle to the parts normal X, Y, and Z. My CAD/CAM software will let > me pick a 3D face and will align to that for generating the code. Is it > possible to do something similar with LinuxCNC? like if you need to > machine a flat and drill a hole at 45 degrees between the X and Z, can you > rotate the CNC coordinate system 45 degrees about the Y axis so that when > you jog X, the machine moves X and Z at a 45 degree angle, and when you > jog > Z, the machine moves Z and X at 45 degrees (90 degrees from the X jog). > > The answer is probably "maybe" > > I don't think that doing what you describe makes any sense unless you > can also change the angle of the tool axis. If you are talking about > changing the tool axis then it becomes a normal 4/5 axis kinematics. > > I guess with a tilting-head mill there is no reason that the angular > axes used by kinematics need to actually be motorised. The AB angles > could be inputs to HAL set to match the physical angles manually set > by the operator. > > There is a 5axiskins in src/emc/kinematics that might already do what > you are describing under the situation described above. > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > > ------------------------------------------------------------------------------ > Get 100% visibility into Java/.NET code with AppDynamics Lite > It's a free troubleshooting tool designed for production > Get down to code-level detail for bottlenecks, with <2% overhead. > Download for free and get started troubleshooting in minutes. > http://p.sf.net/sfu/appdyn_d2d_ap2 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- We conclude that the Second Amendment protects an individual right to keep and bear arms. That right existed prior to the formation of the new government under the Constitution and was premised on the private use of arms for activities such as hunting and self-defense, the latter being understood as resistance to either private lawlessness or the depredations of a tyrannical government." - U.S. Court of Appeals, D.C. Circuit, March 9, 2007 jeremy youngs ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
