The Real Problem
A client contacted us because their production line was behaving erratically: sometimes it would stop, sometimes it would run slowly, sometimes it wouldn’t even detect any product.
The cause? A sensor that looked like an archaeological relic: dirty, poorly calibrated, and pointing who-knows-where.
The Symptom That Confuses Everyone
The worst part is that a malfunctioning sensor isn’t always noticeable.
The machine thinks it’s reading correctly… and you think the machine is malfunctioning.
But no: it’s simply an “eye” that has stopped seeing.
The Origin of the Chaos
When a sensor starts causing problems, the PLC logic goes haywire: incomplete cycles, inaccurate counts, false rejections, micro-stops, and unexplained downtime spikes.
The Solution
The key was to do something basic that many forget: clean, align, and recalibrate.
We also adjusted the sensitivity and checked the actual detection range.
15 minutes of work… and the line came back to life.
Learning for Industry
A dirty sensor can cost you hours of downtime.
And most people don’t even check it.
The solution isn’t always to buy more equipment; sometimes it’s to maintain the one you already have.
