A direct-drive linear axis promises high speed and no backlash. The motor is selected from the peak force needed for acceleration, and in service it overheats, loses force, or faults during repeated cycles. Peak force…
A sensor detects a fast-moving part, but the PLC sometimes misses it. The input light flashes, the wiring is correct, and the logic works in slow testing. The problem is the scan: the controller reads…
A procedure qualifies at a certain heat input. In production the welder runs a little faster to keep up, the current drifts up, and the joint passes visual inspection but fails a bend test or…
A robot picks a machined part with a parallel gripper. The catalog force looks ample, the air pressure is set, and the part slips during a fast swing or drops at the first oil-covered surface….
A gear reducer runs hot and the oil darkens within months. The maintenance book says splash lubricated, the sight glass shows oil, and the unit still wears the top bearings first. Many gearbox failures are…
A sheet metal part is bent to 90 degrees on the press brake. When the ram lifts, the angle reads 93 or 94. The operator bends deeper, and the next batch overbends because the material…
A servo motor produces enough peak torque to move the axis on paper. On the machine it overshoots, buzzes, or faults during fast moves, and tuning never settles it. The torque was checked. The inertia…
A 90 degree curve in a roller conveyor is supposed to turn boxes smoothly. Instead, parts stall, jam against the inside guard, or swing wide and knock the outer rail. Straight rollers bolted along an…
A bracket bolted to a column carries a load offset from the bolt pattern. The designer divides the load by the number of bolts, sizes each one the same, and the top bolts fail or…
A pressure booster station runs one pump on a VFD and two fixed pumps. Pressure swings at high demand, the lead pump runs alone beyond its range, and at night the system cycles on and…
A long push cylinder bends the rod under load and the seal starts leaking. The bore was sized for force, the pressure is correct, and the cylinder pushes the load on the bench. In service…
A vision system is supposed to measure a part and reject defects. The integrator mounts a camera and lens that “look right,” and the images are soft at the edges, the part fills only a…
A welded frame machines flat in the shop and warps after the last clamp comes off. A component that passed inspection cracks months later near a weld. The weld looked sound and the dimensions held…
A cylinder at the far end of the shop moves sluggishly. The compressor runs at 8 bar, the regulator near the cylinder reads 6 bar only when nothing moves, and under load the pressure falls…
A maintenance tech walks the line with a grease gun every quarter and gives every bearing a few pumps. Some bearings run fine. Others start running hot within weeks, and a few fail with grease…
