The Motor That Tripped on Acceleration: Inertia Mismatch, Not Undersized Motor A servo motor driving a belt axis. The motor tripped on overcurrent every time the axis accelerated. The motor was rated for 400 W….
The Machine That Restarted by Itself: Control Circuit Logic, Not a Ghost A packaging line that restarted itself after a power blip. The operator pressed stop, went to clear a jam, and the machine started…
The Cylinder That Slowed at the End of the Line: Pressure Drop Over Distance A machine with 10 workstations. Each station has a clamp cylinder. The first 8 stations clamped fast. The last 2 stations…
The Cable That Broke in the Drag Chain: Cable Routing for Continuous Motion A servo motor cable in an energy chain (drag chain). After 3 months, the cable conductors fractured inside the jacket. The motor…
The Sensor That Stopped Seeing Parts: Teach, Sensitivity, and Lens Contamination A photoelectric sensor (through-beam) detecting parts on a conveyor. It worked on day one. Two weeks later, it stopped detecting every other part. The…
The Frame That Warped After Machining: Residual Stress, Not Bad Milling An aluminum extrusion frame, 1.5 m long. We machined the mounting surfaces flat, checked them, and sent it to assembly. Two weeks later, the…
The Cylinder That Got Loose After 6 Months: Fasteners on Vibrating Equipment A pneumatic cylinder bolted to a machine frame. Six months after installation, the cylinder was loose — the mounting bolts had backed out….
The Robot That Stopped at a Weird Point: Program Logic, Not Hardware A pick-and-place robot. It picked the part, moved toward the place position, and stopped 200 mm short. No alarm, no error — just…
The Vacuum That Took Too Long to Grip: Flow Path, Not Cup Size A vacuum gripper taking 1.5 seconds to build enough vacuum to lift. The cycle allowed 0.5 seconds. The robot was waiting for…
The Belt That Tore at the Loading Point: Impact Energy, Not Tension A belt conveyor carrying 1 kg metal parts. The parts dropped 300 mm onto the belt at the loading point. After two weeks,…
The Axis That Wouldn’t Tune Stiff: Why the Loop Gain Isn’t the Limit A positioning axis that felt springy. When you pushed on the carriage by hand, it moved 0.3 mm and sprung back. The…
The Belt That Walked Off the Pulley: Conveyor Tracking, Step by Step A flat belt conveyor, 2 m long, carrying small plastic parts. The belt drifted to the left over about an hour. By the…
The Cylinder That Slammed Home on Air-Up: End-of-Stroke Cushioning A Ø80 mm cylinder, 500 mm stroke, pushing a heavy slide. When it reached end-of-stroke, the slide slammed hard. The machine rattled. After two weeks, the…
The Cup That Leaked on a Round Can: Vacuum Cup Geometry, Not Size A flat vacuum cup (Ø50 mm) trying to lift a round aluminum can. The cup flattened on the top of the can…
The Bracket That Cost 3x to Machine We designed a bracket for a sensor. The part had a deep pocket (50 mm deep, 10 mm wide) with a 0.5 mm internal fillet. On the drawing,…
