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91 articles
Most unplanned stoppages trace back to small things in the stack: unclean joints, loose torque, a hairline crack. A per-shift, weekly and periodic checklist.
The wider the horn, the harder it is to keep amplitude uniform across the face. Causes, why slots are cut into wide horns, and how very wide parts are split into zones.
Common frequencies run 15, 20, 30, 35 and 40 kHz. Lower means more power and longer reach; higher means smaller amplitude and gentler action. Where each fits.
The stack is a converter, booster and horn in series, all resonating at the same frequency. What each does, and why they cannot be swapped freely.
Clear parts in PC, PMMA and PETG combine three pressures: a fully visible joint, notch-sensitive material, and nowhere to hide cosmetic defects.
Vibration travels through the housing into the components inside. Crystals, ceramic capacitors, relays and sensor diaphragms are all at risk — resonance more than contact.
Pressed together is not fused. A cold weld looks perfect and may survive a casual pull test, yet no molecular bond formed. How to detect and avoid it.
Thin walls lack stiffness, so energy takes unintended paths: punch-through, collapse, or cracking far from the joint from the part resonating on its own.
Whitening and haze are most visible on clear parts. Three distinct causes — stress whitening, micro-cracking from overheating, and re-crystallisation haze.
