Re: [CAD_CAM_EDM_DRO] Re: Servos drivers + THC

[finishes reading, lights THC and begins again] :^P

John

> John,
> tho I dont remember the first email
> i understand the question
> the position llop is closed by the encoder
> but that's not the loop you're concerned with
> the PROCESS loop wraps entirely around the CNc
> it is in control
> lag means nothing
> PID loops wont work
> the arc voltage determines the correct postion NOT time
> time runs most CNC's
> as in: it's now 2mS later, your were HERE you should now be THEREA so
> here's a new command for your amplifier.
>
> in arc control, the correct position is >on the path< and >wherever the
> arc
> sex to be<
> right now it could be here and 2mS later it could be >either< foward or
> backward of the
> last position, entirely dependant on the arc voltage.
>
> take a look at the original work done by the Lazerenkov's at end of
> WWII.11/16/04 +0000,
>
> i gotta restate it:
> the arc voltage closes the position loop
> the cnc lives under the process
> the position is dependant on the arc voltage ( called GAP VOLTAGE by most
> or Ue in
> technical papers... Umschaltung Erodieren, as the technical language of
> EDM
> is German,
> even the Japanese papers use the German terms 0
> regards
> tomp
>
> BTW what's a THC? do you mean a Heidenhain TNC (taste numerik kontrolle)?
> (i think a THC is illegal :-)
>
>
>
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