Re: [Machinekit] Any chance on changing the behaviour of Wrapped Rotary?

[schoone...@btinternet.com]

On 16/05/17 14:52, Sag ich Dir nich wrote: So you mean it is not possible to change the behaviour? may it be possible  if i change the kinematics? I am sure it is possible, but I don't know how OTTOMH. There will be a lot more to it than the kinematics, the interpreter for starters. Just search 'linuxcnc wrapped rotary' and you will see moans going back decades :-D Am Montag, 15. Mai 2017 10:06:27 UTC+2 schrieb Schooner: This has always happened, in Linuxcnc before the fork to Machinekit. Because you are commanding a co-ordinate move, albeit one in degrees, the axis moves to that co-ordinate, by the shortest path The answer is often to use incremental moves (G91). Alternately even define the axis as linear and move a distance which equates to a certain number of degrees. (I used the latter approach in a ATC toolchanger component I wrote, to ensure the axis could not try to rotate in the wrong direction) On 14/05/17 17:33, Sag ich Dir nich wrote: Hello,  i need to change the behaviour of the Wrapped Rotary axis, now it is like: The Axis is at position C0 G0C90 = goes the correct way to 90° G0C0 = turns 270° in the wrong direction, so i have to command G0C-0 to go -90° to position 0° in the correct direction (shortest path) and if i want to go from Position 0° to Position 359° i have to command G0C-359. So i could change the positions of every line but i would probably not do that because my Gcode can reach up to 300k lines (and that would take for ever). Basically before i have to change my Postprocessor (which may not be easy or even possible), i want to try and change the behaviour to go the shortest path (if the position is smaller than the position of the current machine position, for example the machine is at 10° and i command 180°, the machine should move 170° in CW direction but if i command 200° the machine should go CCW direction). The behaviour should look like this: The axis is at position C0 i command G0C10 (CW) and then G0C0 the C axis should go the shortest Path, means 10° in CCW direction.  Can this behaviour changed in the Kinematics or is this a "parameter" of Linuxcnc? Thanks in advance -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to machinekit+...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout. -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to machinekit+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout. -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to machinekit+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.