On Fri, 6 Apr 2012 09:39:04 +0300, you wrote: >I know such thing like feedrate (F in G-code), but don't know any parameter >of velocity for combined moves. Does it exist? How is it called like and >where to find it?
Sorry, my mistake it was angular moves. The valid params in the ini file are MAX_VELOCITY = 5.0 - The maximum velocity for any axis or coordinated move, in machine units per second. The value shown equals 300 units per minute. MAX_ACCELERATION = 20.0 - The maximum acceleration for any axis or coordinated axis move, in machine units per second per second. I don't know if the behaviour for acceleration on combined moves is different to other controllers? But I do know, even on straight line moves Linux CNC's version of 400 mm/sec/sec is not the same as Mach's. I don't know which one is correct. However the look ahead in LinuxCNC is only 1 line and it seems you have to have much larger values of P & Q parameters in G64 to get it to move smoothly between line segments. It seems particularly worse on arc to line, arc to arc and line to arc moves. In case of the Q it has to be approximately 10 times the value I set in Mach - that then becomes unacceptable from an accuracy point of view. >From reports it's OK with servos, but in my experience not so good with steppers via parallel port. >Regarding Mach3 - I think I will be forced to try it with this machine too. Just don't try latest versions ;) Steve Blackmore -- ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
