On Nov 10, 2012, at 10:06 AM, Viesturs Lācis wrote: > Ok, thanks, I will once again think over my approach! > The thing is that the floating head has to be designed and > manufactured, but I already am over the project deadline, while giving > a nut freedom to move some 10 mm in axial > direction can be set up very quickly. But risk of wearing out the > ballscrew nut from outside is not something nice to have... > > Can anyone share some nice and simple floating head design?
We were given a torch holder off a Plasmacam machine (http://www.plasmacam.com/indexfla.php). These machines look kind of crappy, almost as crappy as their website! :-), but the holder is simple and fairly well done and seems to be holding up well on our machine. It just uses slit steel in order to provide the spring action. I suspect they make one to hold a machine torch as well as handheld (like ours). If you are under a deadline perhaps you could just buy the holder from them...? Not sure since their website is pretty much useless you have to call them. There are a couple pictures of it here: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?GantryPlasmaMachine > It is just for probing move to find material surface, then retract and > start piercing. I intend to use plasma tip voltage feedback for > maintaining the torch height during cutting process. > I guess that some kind of capacitance sensor might be used for this > probing purpose, but I have dealt with them only once and actually do > not know, where to get one for a reasonable price. The probing happens before every single cut so there can be hundreds or probes when you are cutting lots of parts and/or large sheets. -Tom ------------------------------------------------------------------------------ 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
