Electromagnetic Vibration Test Bench | DR-D701

Model	DR-D701
Engineering Focus	Reproduce the specified profile with specimen and fixture installed
Architecture	Shaker versus four-point platform requires approved drawing
Frequency	Current page conflicts: 600 Hz heading versus 5–5,000 Hz body
Sizing	Check total moving mass, force, stroke, velocity, acceleration and axes together
Before Quotation	Send profile, load/fixture drawing and FAT targets; request signed DR-D701 datasheet

VIBRATION PROFILE → MACHINE ARCHITECTURE → WITNESSED PROOF

Can DR-D701 Reproduce Your Vibration Profile with the Real Payload?

A frequency number alone cannot answer that. The proposed machine must sustain the specified acceleration or displacement after the specimen and fixture are installed, in the required axis, for the full test duration. Use this page to define that engineering decision before ordering DR-D701.

Model evidence status: DERUI's live page identifies DR-D701 but labels it “600Hz” in the H1 while its body claims “5–5,000Hz.” Those cannot both be treated as a single confirmed rating. Ask for the serial/model-specific datasheet.

Start withMethod + waveform + axis

Then sizeSpecimen + fixture + moving element

Then verifyForce + stroke + velocity + control

01 · Identify the machine

Is DR-D701 a Shaker System or a Multi-Point Vibration Platform?

The present page uses “electromagnetic shaker,” “four-point excitation” and “uniform table vibration” as if they describe one unambiguous machine. They may imply different actuator and control architectures. This must be resolved before a technical claim—or a vibration-standard comparison—is credible.

Electrodynamic shaker route

Request the shaker model, armature diameter/mass, amplifier rating, cooling method, controller, head expander or slip table, and loaded performance envelope. A single shaker system is normally selected around force, displacement, velocity and acceleration limits.

Multi-point platform route

Request actuator count/location, table size, payload distribution, phase synchronization, control-point placement and measured spatial uniformity. A “four-point” statement cannot substitute for this evidence.

Publishing gate: obtain a real DR-D701 machine photo, nameplate and mechanical drawing before describing its drive mechanism. The present gallery and prose alone do not resolve the architecture.

02 · Size the load

Why 100 kg and 50 g Cannot Be Quoted in Isolation

The first screening calculation for a shaker is required force ≈ total moving mass × target acceleration. “Total” includes the specimen, fixture, armature or slip-table moving parts, adapters, cables and relevant attachments—not just the specimen on the bench. Resonance and control strategy can increase the practical demand, so final selection requires the vendor's rated envelope and a witnessed run.

Illustrative sizing only—not a DR-D701 capability claim

If a proposed test has a 20 kg specimen, 10 kg fixture and 8 g peak acceleration, even the specimen plus fixture alone call for approximately (20 + 10) × 8 × 9.81 = 2,354 N peak. The moving-element mass, margins and dynamic effects would increase the required system rating. This example cannot prove DR-D701 can perform the test.

Low frequencies: stroke

Large displacement may be required before a high acceleration value is reached. Confirm peak-to-peak stroke and mechanical clearance.

Middle band: velocity

The velocity limit can constrain the sweep even when force and stroke appear adequate.

High frequencies: force/control

Moving mass, fixture resonances and sensor placement govern whether target acceleration is actually maintained.

For a sinusoidal point, peak displacement is x = a/(2πf)². This relationship explains why the same acceleration target can demand very different travel at different frequencies. It is a physics check, not a substitute for the machine's measured performance curve.

03 · Choose the right test

Three Profiles That Should Not Be Merged into One Claim

Buyer request	Required input	What DR-D701 must demonstrate
IEC 60068-2-6 sinusoidal vibration	Frequency band, sweep rate, amplitude/acceleration, axes, duration, functional checks and mounting	Loaded sine sweep with control tolerance and resonance handling
IEC 60068-2-64 broadband random vibration	PSD breakpoints, overall grms, duration, axes, control/abort channels	Installed random controller, force rating, control spectra and data report
UN 38.3 T.3 battery transport vibration	Adopted manual revision, specimen definition, mounting orientations, prescribed sweep and post-test criteria	Method-specific profile, fixture/monitoring and witnessed evidence; no automatic product certification

IEC describes IEC 60068-2-6 as a sinusoidal method and IEC 60068-2-64 as broadband random. The UN Manual of Tests and Criteria has a separate T.3 transport-vibration procedure. The final test plan, not the standard name in a brochure, determines suitability.

04 · Control the specimen

The Fixture and Accelerometer Can Decide the Result

Mounting review

Document the bolt pattern, fixture material, stiffness, first fixture resonance, specimen center of gravity and cable routing. A heavy, flexible fixture may consume force and distort the input before the specimen sees the intended vibration.

When the test changes axis, define whether a horizontal slip table or a separate mounting orientation is used. The horizontal assembly's mass and travel must be included in sizing.

Control review

Place control and monitoring accelerometers according to the method and fixture dynamics. Agree single- or multi-point control, abort limits, notching where appropriate, sensor calibration and what waveform/PSD report will be delivered.

At resonances, the specimen can experience an amplified response while the control point remains within tolerance. Compare both control and response channels during FAT.

Battery-specific boundary: the shaker is only one part of a battery test. State the cell/battery condition, voltage and temperature monitoring, containment/exhaust review and post-test inspection separately.

05 · Evidence that closes the purchase risk

Ask DERUI to Prove One Representative Loaded Profile

1. Identify the build

DR-D701 nameplate, actual machine and fixture photos, shaker/actuator, amplifier, controller and axis hardware.

2. Show the envelope

Rated sine/random force, frequency, stroke, velocity, acceleration, payload and table size—with definitions and simultaneous-limit conditions.

3. Witness the profile

Run a representative specimen/fixture mass at agreed low-, mid- and high-band points. Supply raw control data and deviation/abort record.

Also agree factory utilities: electrical input, cooling airflow, floor loading, room noise, lifting/access clearance and any climate-chamber interface. If combined temperature/vibration is required, review the separate combined system rather than assuming it is part of DR-D701.

06 · Buyer questions

Questions to Resolve Before Quotation

Is the DR-D701 frequency ceiling 600 Hz or 5,000 Hz?

The live page states both. The correct value—and whether it changes by configuration—requires a signed DR-D701 datasheet and loaded performance curve. The H1 should not retain “600Hz” until resolved.

Does “100 kg load” mean it can deliver 50 g with 100 kg installed?

No such combined capability is proven by the page. Total moving mass and the force, velocity, stroke and frequency limits must be checked at the required test points.

Is random vibration standard?

The current copy claims sine and random, but the exact controller, amplifier and loaded random-force rating are not identified. Confirm the ordered software and witnessed PSD run.

Does the machine provide four-point excitation?

The phrase appears in the existing copy without a machine drawing. Confirm the actual actuator architecture before making it a product feature.

Will this automatically satisfy UN 38.3?

No. A qualified laboratory must follow the adopted T.3 procedure with the correct specimen and records; the equipment must first be shown capable of the required loaded profile.

Send One Profile. Get a Verifiable System Proposal.

Share the test method and your specimen/fixture data. Ask for the exact DR-D701 configuration, a sizing calculation and a witnessed sample run—not a collection of unrelated headline maximums.

Request DR-D701 engineering review

Attach these four items

Waveform or PSD and duration
Specimen and fixture mass/drawing
Axes and sensor locations
Acceptance/reporting requirements

Q: What is an electromagnetic vibration test bench used for?
A: An electromagnetic vibration test bench (or shaker) is used to simulate real-world vibration environments in a controlled laboratory setting. It’s essential for testing the durability, reliability, and structural integrity of products like automotive components, aerospace parts, electronics (PCBs), and batteries to ensure they can withstand vibrations during transport and use.
Q: How does an electromagnetic vibration test bench work?
A: It works on the principle of electromagnetism. An electrical signal (sine wave, random, or shock profile) is sent to a power amplifier, which drives a large current through a coil (armature) suspended in a magnetic field. This creates a force (Lorentz force) that moves the coil and the attached test table/platform, producing precise and repeatable mechanical vibrations.
Q: What are the key advantages of an electromagnetic shaker over other types?
A: Electrodynamic shakers offer superior control over a wide frequency range (typically 5 Hz to 5,000 Hz+), high acceleration capability (up to 50 g or more), and the ability to accurately replicate complex vibration profiles like sine, random, and shock. They are generally cleaner, more precise, and require less maintenance than hydraulic shakers for most high-frequency applications.
Q: What does “four-point excitation” mean on a vibration test bench?
A: Four-point excitation refers to a drive system where four electromagnetic actuators (one at each corner of the table) work in unison. This design ensures uniform vibration distribution across the entire test surface, eliminating “hot spots” and providing consistent, reliable stress to all test samples, which is critical for accurate and repeatable results.
Q: What industries commonly use electromagnetic vibration test systems?
A: Key industries include Automotive (testing components and UN38.3 battery compliance), Aerospace & Defense (qualifying parts for flight vibration), Consumer Electronics (durability testing for phones, laptops), Industrial Manufacturing, and Research & Development labs across various sectors.
Q: What should I look for when choosing an electromagnetic vibration test bench?
A: Key specifications to consider are: Frequency Range, Maximum Acceleration (g), Displacement (mm), Load Capacity (kg), whether you need Vertical or Horizontal orientation, and Compliance with Standards (e.g., IEC 60068, MIL-STD). Also, evaluate features like anti-interference circuitry, control software, and the manufacturer’s support and warranty.
Q: How do you ensure the accuracy of an electromagnetic vibration test?
A: Accuracy is ensured through regular calibration using reference accelerometers, advanced digital controllers that precisely manage the input signal, and built-in anti-interference circuitry to minimize electrical noise. Features like uniform four-point excitation also prevent data skew caused by uneven table motion.
Q: Can an electromagnetic vibration test bench perform multi-axis testing?
A: A standard vertical shaker tests in one axis. For multi-axis testing, systems are often used with a slip table (for horizontal motion) or configured into a multi-shaker setup. Some advanced integrated systems are designed specifically for simultaneous multi-axis vibration simulation.
Q: How important is anti-interference design in a vibration shaker?
A: Extremely important. Electrical noise from the power supply or surrounding equipment can contaminate the control and measurement signals, leading to inaccurate test results. High-quality shakers feature dedicated anti-interference circuitry to ensure “clean” vibrations and reliable data, which is crucial for compliance testing and early fault detection.
Q: What maintenance does an electromagnetic vibration test bench require?
A: Regular maintenance includes checking and tightening mounting bolts, inspecting cooling systems (air or water), monitoring armature bearings for wear, and performing periodic system calibration. Following the manufacturer’s schedule and using genuine spare parts is vital for long-term reliability and performance.

Use this sheet to close the gaps in the current DR-D701 page. It is not a signed performance guarantee or a replacement for the manufacturer's datasheet.

Selection item	Current evidence / required document
Identity and architecture	DR-D701 on live page; request nameplate, real photos and actuator/drive drawing
Frequency	600 Hz in H1; 5–5,000 Hz in body. Do not publish either as confirmed ceiling until reconciled
Sine/random force	No model-specific rating or force-versus-frequency curve supplied
Stroke and velocity	25 mm peak-to-peak appears in general copy; velocity is not defined. Require both with conditions
Acceleration/payload	50 g and 100 kg appear separately. No simultaneous loaded point is established
Fixture and axes	Table size, bolt pattern, allowed center of gravity, vertical/horizontal hardware and effective moving mass to confirm
Controller and sensors	Sine/random licensing, control/limit accelerometers, calibration and raw export to confirm
Facility	Amplifier nameplate, power, cooling, floor loading, noise and installation clearance to confirm
FAT	Witness selected loaded sine and/or random profile with tolerance, abort and report data