Hello! Little too late but still - I suddenly realized that I need some provisions for something similar to floating head for plasma torch. I would like to ask plasma table owners to share their experience, how they have solved the following issue: Hypertherm (and most probably other manufacturers' as well) plasma sources have a signal for cnc controller, when torch has touched the material, which is used to probe the material surface and then retract to pierce height. Since decelerating the plasma torch from the moment, when touch is sensed, takes some time and distance of travel, some provisions for that extra travel are needed.
I have seen lots of videos on Youtube with floating torches, but there are 2 things that keep me reserved about them: 1) vast majority of them are not used with LinuxCNC 2) they require additional construction - bearings etc that I would like to skip So the question is - how do other plasma table owners feel about my superior invention of non-fixed fixture of Z axis ballscrew nut: The basic concept is something like this - motor and ballscrew is attached to Z axis, ballscrew nut is attached to Y axis. And I thought that I could leave the screws, holding the ballscrew nut in place, turned (sorry, I do not know the correct word for that) so that they allow for something like 10 mm free travel of nut to accommodate the deceleration distance. What I mean here is to have the Z axis balscrew nut to lay on its support plate, have screws in place that do not allow it to rotate, but that allow it to move extra 10-15 mm for the situations, when torch has touched material and is not supposed to move further in -Z direction. The question is - has anyone ever attempted something similar and are there any potential issues that I am running into? I am not sure that the nut will be so eager to slide along those screws and that the whole concept would generally fail... -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
