And another youtube video cutting whole part. https://www.youtube.com/watch?v=DdLqBqbmIEE&t=101s
Dne sreda, 04. januar 2017 10.53.57 UTC+1 je oseba Klemen Zhivko napisala: > > Just to follow up: machinekit with BBB and thc works on my setup - here is > video of machine in action. > https://youtu.be/2oMeL6kEZrk > > > Dne sreda, 23. december 2015 12.58.00 UTC+1 je oseba Klemen Zhivko > napisala: >> >> OK I understand. >> My first goal is to finish machine, than I will try CRAMPS setup for 5 >> axis with THC enabled. >> I received CRAMPS board in the meantime. >> If @Charles author of CRAMPS can assign analog pin that can be used for >> THC it would be great. >> If there is some shortcut to working INI and HAL files for CRAMPS that >> support THC control it would be great - I would appreciate for any example >> I can use so I don't need to begin from scratch.. >> >> On Saturday, December 19, 2015 at 8:18:09 PM UTC+1, Viesturs Lācis wrote: >>> >>> Then I do not understand, what is not clear to you. Yes, rotating the >>> tube will require the torch to go up or down, but there are other reasons >>> as well that can require to adjust torch height (material surface being >>> curved, material not laying totally horizontal etc), that is why the plasma >>> tip voltage is measured and the torch position is adjusted according to >>> that (if the torch is too close, the voltage is lower, if it is too high, >>> the voltage increases; it might be ~140-160V for 3-4 mm distance, but that >>> will vary for particular plasma torch and plasma source). In this case it >>> is _not important_, what are the causes. You do not need to tackle >>> kinematics, simply implement standard THC functionality. One way to do that >>> is the task sequence I provided. >>> >>> On Friday, December 18, 2015 at 9:27:26 PM UTC+2, Klemen Zhivko wrote: >>>> >>>> Viestrus, >>>> maybe I was misunderstood - yes option 1 is the right one. >>>> >>>> >>>> On Fri, Dec 18, 2015 at 6:08 PM, Viesturs Lācis <viestur...@gmail.com> >>>> wrote: >>>> >>>>> >>>>> >>>>> On Friday, December 18, 2015 at 5:40:41 PM UTC+2, Klemen Zhivko wrote: >>>>>> >>>>>> >>>>>>> Second of all, I understand that you want basic THC functionality >>>>>>> (not adding offset moves for X and Z to keep the torch tip at the same >>>>>>> spot >>>>>>> on tube's surface, when the rotary head is moved) and since you are >>>>>>> using >>>>>>> CRAMPS, I understand that you are using stepper motors. >>>>>>> >>>>>> Ugh, as I understand if - if THC is operating, rotating pipe (moving >>>>>> B axis) should have effect on Z axis. Standoff of torch to pipe surface >>>>>> (acording to my sketch) is measured in Z direction. >>>>>> >>>>> >>>>> THC description clearly says that it adjust torch height according to >>>>> plasma tip voltage - either you did not read it or I do not understand, >>>>> what exactly do you want. Which one of these 2 options? >>>>> 1) adjust Z position, based on plasma tip voltage, aka standard THC; >>>>> 2) adjust Z (and X as well) position to keep plasma torch tip on the >>>>> same spot on the square (rectangle to be more precise) tube surface as >>>>> rotary head is turning; >>>>> >>>>> -- >>>>> website: http://www.machinekit.io blog: http://blog.machinekit.io >>>>> github: https://github.com/machinekit >>>>> --- >>>>> You received this message because you are subscribed to a topic in the >>>>> Google Groups "Machinekit" group. >>>>> To unsubscribe from this topic, visit >>>>> https://groups.google.com/d/topic/machinekit/jTE2p9Jc6Fo/unsubscribe. >>>>> To unsubscribe from this group and all its topics, 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.
