http://www.practicalmachinist.com/vb/fabrication-cnc-laser-waterjet-plasma-welding-and-fab/ebay-torch-height-control-anyone-use-256120/
I followed some of the links and there is more to it than meets the eye. j. On Sat, Nov 21, 2015 at 8:07 PM, Andrew Back <[email protected]> wrote: > I wonder if someone could offer some advice on hal configuration for a > DC motor which is wired via a H-bridge and used to position a plasma > torch. > > The motor was originally driven by a torch height control unit which > had an initial height setting, but there is no encoder or any sort of > feedback from the motor/lifter assembly. So, this must have been done > by finding the workpiece and then turning the motor on for N > milliseconds to retract the torch to piece height. > > My question is, what hal components can I use to achieve the same? I'm > guessing pwmgen would be used to drive the motor via the H-bridge, but > how to connect this up so that you can jog Z position in Axis and set > via G code. > > Regards, > > Andrew > > -- > Andrew Back > http://carrierdetect.com > > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
