Jon Elson wrote: > richard harris wrote: >> Hello, >> >> I started tuning my new system using halscope and plotting ferror, >> commanded position, and feedback position. Things are going well, >> however I can not decipher the units of the vertical scale. It shows >> ferror in m/div this can not be meters. > it is milli * user units, so if you are set to metric, it > should be micro-meters, I think, since the user units are > already mm.
That is right... the units display in halscope only shows the "prefix", like 'm' for milli, K for kilo, etc. Halscope doesn't know what the actual physical units are. If you are using inches, then 'm' means milli-inches (0.001"), 'u' means microinches, etc. If your machine units are millimeters, then 'm' is microns. Unlike a real oscilliscope, halscope is looking at floating point variables, which have a huge range. A regular scope can be adjusted from perhaps 1mV per div to 100V per div. Halscope can go from pico-units per div to giga-units per div.... Regards, John Kasunich ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
