Smarter than a limit switch (a shuttle driven by a common AC motor does not stop exactly in position) Manufacturer: "The shuttle is not stopping right in position" Programmer: "Yes, it is due to the shuttle mass inertia, you must change the limit switch position to compensate the inertia stroke" Manufacturer: "Can you avoid it by software?" Programmer: "Unfortunately not, I am stopping the shuttle as soon as the limit switch trips" Manufacturer: "Why don't you detect the limit switch BEFORE it trips?"
- posted
19 years ago