On 4 January 2014 04:40, Gregg Eshelman <[email protected]> wrote: > Can LCNC combine the two motions that are in the same plane to provide a > greater range than either alone?
The simple way would be to call the quill Z and the table W. Your G-code can then issue W commands to make gross changes in level, and you can jog W for touch off etc. You might also want to put the tool lengths in W too. At that point you might well find that the Z travel is adequate. Similarly for Y and V. > Probably best to replace the hydraulic cylinders with ballscrews, > unless there's a way to precisely position hydraulic rams without direct > machine position feedback (linear scales). That sounds like quite a lot of work, though the machine will end up quieter than in hydraulic mode. If the machine has linear scales then it ought to be relatively easy to use those for feedback and control the machine by feeding CNC into wherever the "feeler" probe attached. This is likely to be very easy indeed for an electrical feeler, maybe more of a challenge if it was purely hydraulic. In the latter case you might want to swap the feeler valves for hydraulic servo valves (Moog valves) though these are quite expensive. One very easy thing to try would be beefy radio-control servos pushing the feeler point under LCNC control. Servo hydraulic machines can be extremely stiff and very precise. I used to run a single-axis machine (actually a large fatigue testing machine) and that would move with 200 tons of force and micron precision. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
