On 12/26/2013 3:52 PM, EBo wrote: > On Dec 26 2013 2:47 PM, Viesturs Lācis wrote: >> 2013/12/26 Andrew <[email protected]> >> >>>> Yes, that is very reasonable. Just calculate the scale and use >>> usual >>> planning. >>> The task can also be reversed: increase world velocity to the >>> maximum >>> allowed by joint constraints. This can be useful for G0 moves. >>> >> >> Umm, sorry for offtopic, am I the only one to be missing out >> something >> obvious and think that this whole problem would apply _only_ to rapid >> (G0) >> moves? >> All the other moves are feedrate limited - they are executed at the >> requested feedrate and intentional deviation from that does not seem >> right, >> so I am missing, how the whole concept of checking for worst-case >> velocity >> violations and scaling down appropriately will not break the purpose >> of >> requesting particular feedrate in code. > > I was going to ask the same thing... If the issue is with the rapid > traverse that is set limited with the max velocity. Are you sure that > the max velocity is set correctly?
Hmm...I've been doing g0 moves (as mentioned elsewhere in this thread), but I suppose a g1 with a feed-rate would be one way to side-step the issue. Look! LinuxCNC works GREAT with arbitrary kinematics! Just don't do any g0 moves! :-O ...but I digress... Yes, I'm pretty sure the maximum velocity is set correctly. I can do g0 moves inside the "safe box" on any one axis without problem. If I go a g0 move across two or three axis, I get following errors which I believe is due to LinuxCNC thinking it can go at the maximum velocity in all three X/Y/Z axis AT THE SAME TIME. So is there a "maximum feedrate" setting for g0 moves? That would fix a *BIG* chunk of my problem without additional code. If so, how do I set it? If this isn't possible, why not? I would think this could have application even to standard Cartesian machines, where you don't want the head traveling more than a certain speed, regardless of the heading vector. -- Charles Steinkuehler [email protected]
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