A metal box only provides a Farday cage to prevent inducing noise into signals. What is much more important is to understand and design your ground current paths so they are not going to induce any common mode or differential mode currents where they will cause problems. You will also want to understand the concept of a ground pavilion.
An inductive filter of incoming power can be important, as is proper shielding isolation of drive and sensor signals. Beyond that, most people get lost buying expensive gadgets that won't correct the underlying design flaws. The ever repeated flaw is failing to use home-run grounding and thinking that connecting every thing to ground at every point is a good idea. Isolating grounds can often solve puzzling problems. Failing to consider both common and differential mode noise sources produces strange explanation from even electrical engineers. Failing to realize that a wire connected to ground at one end is not at ground on the other end, if it is carrying current is endemic. See - http://wiki.xtronics.com/index.php/Lightning_Failures_in_Transducers -------------------------------------------------------------------------------- Karl Schmidt EMail [EMAIL PROTECTED] Transtronics, Inc. WEB http://xtronics.com 3209 West 9th Street Ph (785) 841-3089 Lawrence, KS 66049 FAX (785) 841-0434 Education consists mainly of what we have unlearned. -- Mark Twain -------------------------------------------------------------------------------- ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
