On Fri, Sep 13, 2013, at 04:08 PM, andy pugh wrote: > On 13 September 2013 20:54, sam sokolik <[email protected]> wrote: > > High speed machining/routing/whatever with short line/arc segments is > > only possible at the moment with linuxcnc on high acceleration > > machines. (I had to set the acceleration to over 450in/sec/sec to get > > the velocitys up to 400ipm) > > To follow a circular path the machine has to accellerate, and the > magnitude of the accel is v^2/r > > To make a 1" radius circle at 400ipm the machine has to accelerate at > 44 in/s/s. Which is less. Unless I am making a mistake (I am not used > to working in inches, but I don't think that matters here?) > > So, it looks like that is not the limit here (I am almost certain that > _was_ the limit in the example that Steve Blackmore showed us a few > months ago) >
I'm pretty sure the impact of acceleration is that LCNC always wants to be sure it can stop at the end of the 1-segment look-ahead. If the accel (decel) rate is slow, it can't go very fast before the stopping time extends beyond the length of the look-ahead. -- John Kasunich [email protected] ------------------------------------------------------------------------------ How ServiceNow helps IT people transform IT departments: 1. Consolidate legacy IT systems to a single system of record for IT 2. Standardize and globalize service processes across IT 3. Implement zero-touch automation to replace manual, redundant tasks http://pubads.g.doubleclick.net/gampad/clk?id=51271111&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
