Ultrasonic Welders — Niche Equipment, Enormous Downtime Costs
Ultrasonic welders join plastics, textiles and foils in seconds — no adhesive, no external heat, no fasteners. They operate in industries where quality is non-negotiable: automotive (seals, bumpers, lamp housings), medical (sterile packaging, filters, cannulas), electronics (device housings), food (aseptic packaging) and textiles. A production line machine running 30–60 welds/minute generates losses of €500–3,000/hour when stopped.
A new ultrasonic generator (electronics only, without the mechanical press) costs €4,500–18,000. Lead time from the manufacturer: 8–20 weeks. Our repair: 5–10 working days, €280–1,400.
We serve production plants from Poland, Germany, Austria, Czech Republic, Slovakia, Hungary, Romania, France, Belgium, Netherlands, Italy, Sweden, Denmark.
Ultrasonic Welder Manufacturers We Service
Branson Ultrasonics (USA / Germany)
- Branson 900 Series (900aa, 900b): Analogue 20 kHz generator, many units still in production after 20+ years. Failures: burned transistor bridge (MOSFET IRF540/IRFP460), PLL frequency stabilisation fault, failed matching transformer.
- Branson 2000X / 2000ea Series: Digital 20–40 kHz generator with DeviceNet/Profibus/EtherNet/IP. Failures: failed DSP card (TI TMS320F28335), "Overload" error with healthy transducer — burned IGBT output transistors (IXYS IXGH32N60C), failed DC-DC 24V/5V power supply.
- Branson 40xx Series (4000 Digital): Advanced 40 kHz generator for thin films and small parts. Failures: IGBT bridge failure in 400W/800W module, failed amplitude feedback circuit, Ethernet communication failure.
- Branson DCX Digital: Latest generation. Failures: failed DSP, amplitude calibration error after mechanical impact, failed internal 48V PSU.
Herrmann Ultraschalltechnik (Germany)
- Herrmann HiQ Dialog: Digital generator with touchscreen. Failures: burned GaN/IGBT output module after mains surge, failed controller board (Cortex-M7 MCU), failed TFT display.
- Herrmann HiQ Vario: 200–2000W generator with continuous power control. Failures: failed resonance capacitors (polypropylene 630V), "Frequency Deviation" error.
- Herrmann HiQ Classic: Older digital 20 kHz generator. Failures: failed IGBT driver (IR2110/IR2113), exploded electrolytics on 325V DC supply.
Telsonic AG (Switzerland)
- Telsonic MPX Series (MPX750, MPX1500): Modular 20 kHz generator. Failures: failed power module (IGBT Infineon FF225R12ME4), failed Profibus/Profinet communication card, failed transducer (PZT ceramic replacement).
- Telsonic SONIC System: Metal welding generator. Failures: burned IGBT bridges after short circuit in welding fixture, "Overtemperature" — failed NTC sensor or fan.
Weber Ultrasonics (Germany)
- Weber SL Generator (SL 200, SL 500, SL 1000): 20–30 kHz 200–1000W. Failures: failed IGBT driver after mains surge, "No Frequency" — failed PLL circuit (VCO chip SMV1251), failed buffer transformer.
- Weber Digital Generator: Digital with IO-Link interface. Failures: failed CPU board (STM32H7), IO-Link communication error.
Rinco Ultrasonics (Switzerland) / Mecasonic (France) / Schunk Sonosystems (Germany)
- Rinco G35 / G50 Generator: 3500W/5000W for large parts. Failures: failed IGBT transistors in 3-phase module, "Amplitude Deviation" error.
- Schunk Metal Welding Generator: Copper wire splicing (automotive harnesses). Failures: burned IGBT bridge after short circuit in welding jaw.
Key Electronic Components and Failure Modes
- Rectifier + PFC: Converts mains AC to DC 325–600V. Failures: burned diode bridge, failed PFC circuit (L6563, MC33262), cracked DC bus electrolytics.
- H-bridge IGBT/MOSFET: Converts DC to HF AC. Common types: Infineon IKW25N120H3, IXYS IXGH32N60C, IRF840, STW15NB50. Most frequent failure after overload, sonotrode short or resonance mismatch. Bridge repair: €120–480.
- Matching Transformer (ferrite core HF): Failures: winding short after overheating, open primary. Repair: rewinding or core replacement.
- Resonance Capacitors: Polypropylene 400–630V AC, class X2/X1. Failures after forced resonance operation. Batch replacement: €60–180.
- PLL / DSP: Analogue PLL (CD4046, LM566) or digital DSP (TI TMS320F28xxx). Failures: "No Frequency Lock", "Frequency Deviation". DSP repair: €280–780.
- Controller / CPU Card: ARM Cortex-M MCU (STM32, NXP LPC, Renesas RA) or DSP managing amplitude, weld time, pressure profile, fieldbus protocol. Failures after ESD, flooding. Repair: €320–980.
Pricing
| Repair Scope | Model / Manufacturer | Price |
|---|---|---|
| IGBT / MOSFET bridge repair | Branson 900, Weber SL, Mecasonic | €180–480 |
| IGBT bridge repair (Infineon module) | Telsonic MPX, Rinco G35/G50 | €320–780 |
| DC power supply repair (PFC + rectifier) | All models | €120–380 |
| PLL / resonance tracking circuit repair | Weber SL, Branson 900, Mecasonic | €180–420 |
| DSP or CPU card repair / replacement | Branson 2000X/4000, Herrmann HiQ, Telsonic | €320–980 |
| Resonance capacitor replacement | All models | €80–220 |
| HF transformer rewinding | All models | €180–380 |
| Fieldbus card repair (Profibus/Profinet) | Branson 2000X, Herrmann HiQ | €220–580 |
| Full generator overhaul | All models | €480–1,400 |
| Diagnostic without repair | — | €80 |
DHL Express courier — collection and return across Poland and Europe. Repair time: 5–10 working days. Warranty: 12 months. Service open Mon–Fri 08:00–16:00. No-fix no-fee.