Hello: Peter Todd escribi=F3: >You need to tell us what exactly is being tracked, what's the range, how >fast is it moving, etc. > >There just isn't enough detail in what you are giving us to really know >what to say. Sounds like you're doing something with automated mfg, but >what? > > = > Thank you by your quick answer. You are right, incomplete data. The equipment is a welding seam follower. The goal is to provide a = constant relative positioning of the head, compensating some misaligment = and variation in distance (up to two axis into the same sensor) between = welding head and sheets to be welded. Travel speed 30-200cm/min. The sensor is 5cms (aprox) near the arc = (heat, magnetic field...). Thanks. Luis I. -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist