What it is
- Sine force: 8,000 lbf (35.6 kN) peak
- Random force: 8,000 lbf (35.6 kN) rms (440 mm); 7,309 lbf (32.5 kN) rms (640 mm)
- Half-sine shock force: up to 18,030 lbf (80.2 kN) with XPA48K; up to 31,475 lbf (140.0 kN) with XPA88K
- Acceleration: up to 112.0 gn sine peak and 100.0 gn random rms (440 mm)
- Velocity: 98.4 in/s (2.5 m/s) sine peak; 157.5 in/s (4.0 m/s) shock peak
- Displacement: 3.0 in (76.2 mm) peak-to-peak
- Usable frequency range: 5 Hz to 3,000 Hz
- Internal load support: 1,323 lb (600 kg)
- Required amplifier: LDS XPA48K or XPA88K
Swept and dwell sine testing to 8,000 lbf (35.6 kN) on both armatures, at up to 112 gn and 98.4 in/s (2.5 m/s) on the 440 mm.
PSD screening and qualification to 8,000 lbf (35.6 kN) rms and 100 gn rms on the 440 mm armature, 7,309 lbf (32.5 kN) on the 640 mm.
Two-millisecond half-sine pulses to 31,475 lbf (140.0 kN) with the XPA88K, with shock velocity to 157.5 in/s (4.0 m/s).
What it is used for
- Classical shock testing: half-sine pulses up to 31,475 lbf (140.0 kN) with the XPA88K, with shock velocity to 157.5 in/s (4.0 m/s).
- Random vibration testing: random profiles up to 8,000 lbf (35.6 kN) rms and 100 gn rms on the 440 mm armature.
- Low-frequency, long-displacement testing: profiles that need 3.0 in (76.2 mm) of stroke and 98.4 in/s (2.5 m/s) sine velocity.
- Squeak and rattle testing: running in Quiet mode with the cooling fan switched off for short periods at low force.
- Large fixtures and payloads: mounting large fixtures on the 640 mm armature, with test articles supported by the 1,323 lb (600 kg) internal load support.
- Horizontal testing: combo mounting with an LPT or HBT slip table.
Key features
- Inductive centring system (ICS): increases system reliability.
- Three operating modes: Standard, Quiet, and COOL. COOL mode monitors system parameters and cuts the power needed for a given test. Quiet mode runs with the fan off for short periods at low force.
- Inverter-driven cooling fan: fan speed is controlled automatically in COOL mode, or manually, to reduce power consumption and acoustic noise at lower test levels.
- Touchscreen amplifier interface: displays interlocks, temperatures, voltage and current, power consumption, and power savings.
- Built-in diagnostics: CAN bus monitoring from the shaker through the pneumatics control unit. Data is shown in real time and stored in the amplifier for preventive maintenance and fault detection.
- Two armature sizes: 440 mm and 640 mm, with flush or raised stainless-steel inserts in M8, M10, or 3/8 UNC.
- Overturning moment restraint: 13,214 lbf·in (1,493 N·m).
- Low gauss option: reduces stray magnetic field to under 8 gauss (0.8 mT).
Why engineers pick it
The V8750 system
- LDS XPAK amplifier: XPA48K or XPA88K, with touchscreen interface and internal diagnostics.
- Pneumatics control unit: emergency stop, Lin-E-Air and internal load support controls, and indicators for armature position and load support pressure.
- Cooling fan: inverter-driven, with optional silencer or acoustic enclosure.
- HBT slip table hydraulic unit: stand-alone pump for HBT slip tables. LPT slip tables carry their hydraulic supply inside the table.
Site requirements
- Power: 3-phase, 380 to 480 V, 50/60 Hz. Total steady-state requirement for amplifier and fan is 60 kVA with the XPA48K, or with the XPA88K 60 kVA (Type C MCB) or 68 kVA (Type B MCB).
- Compressed air: 100 psi (6.9 bar).
- Ambient: shaker +45 to 86 °F (+7 to 30 °C); amplifier +41 to 86 °F (+5 to 30 °C).
- Acoustics: 108 dBA shaker and 74 dBA amplifier at 3.3 ft (1 m). The cooling fan is 102 dBA, 99 dBA with a silencer, or below 80 dBA in an acoustic enclosure.
Configuring and scaling
- Amplifier: XPA48K or XPA88K.
- Armature and inserts: 440 mm or 640 mm armature; flush or raised inserts.
- Mounting: base mount, Lin-E-Air trunnion, or combo with an LPT or HBT slip table (600, 750, 900, or 1220).
- Other options: low gauss option, V-groove castors, air glides, thermal management, head expander, fan silencer, and acoustic enclosure.