Top Final Limit Switch stop accuracy?

• A. 1/8 inch
• B. 1/32 inch
• C. 1/4 inch
• D. 1/16 inch

Answer: (D)

The top final limit switch stop accuracy is about how close the car stops to the top landing when the final limit switch is activated. This stopping point needs to be repeatable and precise so the car lands neatly against the top platform and the clearance with the comb plate and floor is correct, without risking contact or a noticeable gap.

A tolerance of one-sixteenth of an inch provides that tight, reliable stop while accounting for normal wear, vibration, and small misalignments that occur in service. It keeps the stop point tight enough to maintain proper alignment with the landing while not being so tight that ordinary wear would cause frequent mis-trips or nuisance adjustments.

If the tolerance were much looser, the car could stop too far from the top or sit angled relative to the landing, creating clearance issues or misalignment. If it were too tight (like one-thirty-second of an inch), minor movement or wear could cause the switch to trip inconsistently. So one-sixteenth of an inch is the sweet spot for consistent, safe stopping at the top.