Nicklas, i think i presume too much edm experience, sorry for positioning, most edm systems use a low power sensing circuit really low, like 12 V at 100ma is plenty
if you are positioning, this low power sense circuit is always in operation if you are cutting, the spark generator is in operation one or the other is connected to the toolholder and the worktable at all times when positioning: so if you are positioning, then something like 12 volts at 100 mA is seen between the tool and the work if the tool touches the work, the voltage drops, and you have contact if the voltage appears you are free to move about when cutting: if you are cutting, the spark generator supplies a pulsed voltage to the tool and work this voltage is integrated, and the integrated value is evaluated if this voltage is seen to be high, the system moves 'fast' if this voltage is low, the system stops forwards motion and reverses direction in between there is an ideal voltage that the servo system tries to maintian the speed varies from 0 ( when sensed voltage = programmed voltage ) to maximum in positive motion ( when sensed voltage is 'high') to maximum in negative value ( when sensed voltage is 0) in between maximums , the velocity is proportional so a simple voltage drop is used to 'touch', the entire machine acts like a switch ( open or closed ) the code to switch from positioning to cutting simple selects the proper guide voltage hth tomp tjtr33 On 12/24/16 03:06, Nicklas Karlsson wrote: >> Merry Christmas to all >> >> Iam presuming we could use the probe sequencing as a way to find centre of >> a hole , or find an edge >> in the same way as a mill , just inhibit any power or in the case of a wire >> keep it stationary > The sparc generator have the potential to sense the voltage and I guess there > might be some close up effect like capacitance or maybe even a change in > voltage depending on distance. To keep it stationary is probably not of much > use but if carefully moved around a little bit it might be possible to sense > the edge of the hole. > >> Niklas >> regarding your speed widget , it could be that the speed widget is not >> loaded at the time your looking to find the pin >> so changing the order of loading might help , >> >> Sarah > Will try give changing the order of loading a try. > > > Nicklas > > ------------------------------------------------------------------------------ > Developer Access Program for Intel Xeon Phi Processors > Access to Intel Xeon Phi processor-based developer platforms. > With one year of Intel Parallel Studio XE. > Training and support from Colfax. > Order your platform today.http://sdm.link/intel > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today.http://sdm.link/intel _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
