faq

Answered before the call

Motion Platform FAQ

Fifty-five questions that span a whole project — from working out whether we are a fit, through quotation, contract, build and acceptance, to shipping, installation and support ten years later. It opens with the eight asked before anyone talks about working together — payload, cost, speed, accuracy, lead time. Deeper technical questions keep their own guides, linked opposite.

cscmotion faq

01 · The platform itself — specification and cost

The eight asked most often, before anyone talks about working together. Each is answered in a sentence and points at the guide that carries it in full.

Rated load across the delivered base runs from 20 kg to 35,000 kg, spanning 215 delivered configurations in 15 platform lines. Almost none are repeats, so the number that matters is not our maximum but whether your figure sits inside a band we have built in before.

The published ranges per platform line are in the controlled specification document, and note that rated structural load and usable payload are different quantities — ask which one any supplier is quoting.

There is no list price, and a supplier who quotes one before knowing your load and trajectory is quoting a different machine. The dominant driver by a wide margin is payload multiplied by acceleration, because together they set peak actuator force, which sizes the cylinders, motors, drives, structure and foundation.

Two platforms with the same stated payload can differ several-fold if one is specified for twice the acceleration. The six cost drivers are set out in the buying guide, along with the costs that sit outside the platform price.

Across the delivered base, linear velocity reaches 1,600 mm/s and acceleration 1 g — but not on the same machine, and not at every payload.

Acceleration falls as moving mass rises: a 35,000 kg marine table is recorded at 0.2 g while a 100 kg stabilised deck reaches 0.8 g. Any acceleration figure quoted without the gross moving load it was measured at is not usable. The sizing guide shows how the three constrain each other.

It depends on what the platform is for, and on which of two different quantities you are being shown. On the precision positioning line, positioning accuracy is 0.01° and 0.1 mm, with repeatability of 0.005° and 0.05 mm. Motion platforms built for cueing are specified quite differently.

More important than the number: a figure measured under load with a laser system and a figure derived from encoder resolution look identical on a datasheet and can differ by an order of magnitude. We verify externally. The glossary explains the distinction.

Because the honest answer depends on three things that vary enormously: how much engineering the configuration needs, whether a previous delivered configuration is close enough to adapt, and current workload. A figure quoted before the engineering review is a guess presented as a commitment.

What we will do is tell you at enquiry which of those three is driving your case, and confirm a date with the quotation. If you have a fixed installation window, say so at enquiry rather than at order — it sometimes changes the configuration we recommend.

The question to answer first is whether surge, sway and yaw carry information your task actually depends on. For many training and test applications they do not, and three axes deliver the required cue at lower cost and in a smaller envelope; for others the absence of those axes makes the platform unfit for purpose.

The comparison guide works through which axes each configuration gives you, including what tilt coordination can and cannot substitute for.

We build all-electric platforms, so treat this answer as interested and check it elsewhere. The short version: hydraulic still genuinely wins on very high sustained force in a small package, and on projects where an existing hydraulic infrastructure is already installed and maintained.

For most industrial and research work below that threshold, electric wins on noise, maintenance, room services and positional stability. The comparison sets out both cases, including where we are the wrong supplier.

Every mechanical component is designed to more than three times rated load, with finite-element verification applied to the servo cylinders at that factor.

Structural and modal behaviour is solved twice by independent methods — finite element in ANSYS and multibody dynamics in ADAMS — and disagreement between the two is treated as a finding rather than smoothed over. Workspace is analysed by Monte Carlo sampling rather than boundary assumption.

02 · Before you enquire — is this a fit?

The questions worth settling before either side spends time on a specification.

All-electric motion platforms from 2DOF to 6DOF, including Stewart-type parallel platforms, together with the servo electric cylinders, motion controllers and control software that drive them. All four are designed and manufactured by us rather than sourced, which is why we can adapt stroke, force and controller behaviour to a project.

We engineer to order. There is no fixed catalogue with model numbers because each platform is designed against a specific gross moving load, trajectory and duty cycle. Where a previous configuration is close to a new requirement we adapt it, which shortens both engineering time and lead time considerably.

If you are wondering whether a standard product would serve you better, the buying guide covers that trade-off without arguing for either.

Delivered platforms run from 20 kg to 35,000 kg of rated load across 215 configurations, so the mechanical range is rarely the constraint. The economics are: a very small single unit carries proportionally more engineering cost than a larger one, and we will say plainly whether that makes sense for your case before quoting rather than after.

Yes. Platforms are exported worldwide by sea, air and rail depending on size and urgency. Export documentation, packing and the applicable Incoterm are handled as part of the order; tell us which Incoterm your procurement process requires and we will quote on that basis.

Yes, this is a normal arrangement. We can supply the motion platform as a subsystem for integration into your own product or simulator, including repeat builds of an agreed configuration. Branding, documentation and interface conventions can be adapted to your requirements.

Yes. Where an integrator is delivering a complete simulator or test system, we supply the motion platform and its control system within their scope. In that arrangement the interface document and acceptance criteria are agreed with the integrator rather than the end user.

Yes, and we would rather say so early. Nanometre-class positioning, requirements that genuinely need hydraulic drive, complete simulator delivery including cockpit and visuals, and projects needing a contractual on-site response measured in hours are all better served elsewhere. We list those cases explicitly, along with the kind of supplier that does fit.

03 · Enquiry and quotation

What we need from you, what you get back, and how long it takes.

At minimum: the gross moving load, the centre-of-gravity height above the platform, one representative combined trajectory, and the duty cycle. Site constraints and host interface requirements let us quote more precisely.

A partly complete enquiry is a normal starting point — stated unknowns are more useful than optimistic placeholders. The specification builder assembles these into a structured block you can paste into an email.

A budgetary response to a reasonably complete enquiry is normally quick. A firm quotation requires the engineering review — workspace check, dynamic solution and component selection — and therefore takes longer. We will tell you which one you are getting and when to expect it.

Pre-order feasibility assessment and quotation are not charged. Where a project requires substantial bespoke design work before an order can be placed — detailed simulation studies or concept design packages, for example — that is agreed separately in advance. We will never run up chargeable work without telling you first.

Yes. Many enquiries involve confidential payload geometry, test methods or programme information. We can sign your NDA or provide a mutual one. If confidentiality is a concern, raise it at first contact rather than after sharing technical detail.

Yes, and it is often the sensible first step. With approximate moving load, travel and acceleration we can give an indicative figure so a budget can be framed. It is explicitly indicative — the firm number follows the engineering review, and we will flag any requirement likely to move it significantly.

If you want to understand what drives the number before asking, the cost drivers are set out here.

Technical questions are answered by engineers rather than routed through a sales queue. Projects are assigned an engineering contact who stays with the project through design, build and acceptance, alongside a commercial contact for contractual matters.

Project correspondence, drawings, interface documentation and acceptance records are produced in English. Chinese is our working language internally. If your project requires documentation in another language, raise it during quotation so translation can be included in scope.

04 · Contract and commercial

Terms, ownership and the things procurement departments ask about.

Engineered platforms normally use a staged structure tied to project milestones — typically an engineering release stage, a manufacturing stage and a pre-shipment stage — rather than a single payment against delivery. The split and the milestone definitions are stated in the quotation.

We work on this basis rather than a fixed published schedule because the milestones themselves differ by project: a platform with six weeks of engineering ahead of it has a different risk profile from an adaptation of an existing configuration. Letters of credit and other instruments can be accommodated where your procurement process requires them.

Our underlying platform technology, servo cylinder designs and control software remain ours; they are covered by our registered patents and software copyrights. Project-specific information you supply remains yours.

Where a project involves genuinely novel joint development, ownership is agreed in the contract before work starts rather than assumed.

We are willing to review customer terms and framework agreements. Send them during quotation rather than after, since terms occasionally interact with scope — acceptance definitions, liability limits and delivery obligations in particular — and it is far easier to resolve those before a price is fixed.

Twelve months from acceptance is the normal basis, with duration, coverage and response commitment confirmed in the quotation and contract. Extended arrangements can be agreed where uptime carries a cost — that is a commercial question rather than a technical one, so raise it during quotation rather than after.

Because we manufacture the cylinders, controllers and software ourselves, warranty support does not depend on a third-party component supplier's response time. Ask any supplier what happens when the failed part is one they bought in.

ISO 9001, ISO 14001, ISO 45001, CE and the GJB9001C-2017 defence quality management system. Certificates are issued on request with the issuing body and expiry date, so they can be checked at source rather than taken from a PDF. Full detail is on the certifications page.

Yes. Supplier qualification packs, vendor registration forms and compliance questionnaires are a routine part of industrial procurement and we complete them as part of the process. Send the forms early — some ask for information that takes a few days to assemble, and that is better discovered before a deadline than on it.

05 · Engineering and manufacturing

What happens between the order and the finished machine.

Engineering review and design; mechanism and structural analysis; manufacture of cylinders and structure; assembly; control system integration and tuning; calibration and measurement; factory acceptance testing; packing and shipping; then installation, commissioning and training on site as contracted.

The engineering method behind the design phase is documented separately if you want the detail.

Reporting cadence is agreed at order stage and normally follows the project milestones rather than a fixed calendar. For longer projects we can provide photographic progress records at defined stages, which is common where the buyer cannot travel to witness the build.

Changes are possible but their cost depends entirely on timing. A change during engineering may be inexpensive; the same change after structural fabrication may not be feasible at all. Tell us as early as possible, and we will state the schedule and cost effect before anything is committed.

Yes. Customers are welcome at our Nanjing facility, and factory visits during manufacture or for acceptance testing are common. Where travel is impractical, remote witnessing of acceptance testing and photographic build records are both available.

We tell you, before an order rather than after. Usually the finding is that one requirement is driving the design disproportionately, and relaxing it slightly brings the rest into range.

Occasionally the honest answer is that a different architecture or a different type of supplier suits the project better, and we say that too.

Core work is done in-house: servo cylinder machining, structural fabrication, assembly, control system build and testing. Standard commodity items such as bearings, motors and electrical components are purchased, as they are by every manufacturer in this field. If the origin of a specific component matters to your qualification process, ask and we will tell you.

06 · Testing and acceptance

How the platform is proved before it leaves the building.

The platform is tested against the agreed protocol using the contracted test load, trajectory and reference point, with the specified instrumentation. Positioning accuracy and repeatability are measured rather than derived. Results, including any deviations, are recorded and released with the platform.

Yes, and we would encourage it. A sample factory acceptance protocol and a sample interface document can both be provided during quotation. Reviewing them early is one of the more effective things a buyer can do — it is much easier to agree what constitutes success before an order than after a delivery.

The thresholds our platforms are designed and accepted against are published rather than held back — continuous-operation drift, loaded static hold, cross-axis coupling, waveform distortion and the rest. The full criteria table sits with the delivered project records, so you can see how each one reads against a real machine.

Yes. Remote witnessing by video link is a normal arrangement, particularly where travel is difficult. Agree the format during contract so that camera positions, instrument readouts and the record format are established before the test rather than improvised on the day.

It is corrected and retested before shipment; that is what factory acceptance is for. This is also why the acceptance protocol should be agreed before the order — a test with defined pass criteria can be failed and fixed, whereas an undefined one turns into a negotiation after delivery.

Interface documentation covering the command set, coordinate convention, update rates and fault behaviour; the factory acceptance record; operating and maintenance documentation; and electrical and mechanical drawings as contracted. Sample interface and acceptance documents can be provided before an order.

07 · Shipping, site and installation

Getting it to you, and what the building has to provide.

In export-grade timber crating with the moving assembly mechanically locked for transit. Larger platforms are partially disassembled and shipped in sections with reassembly documentation. Sea, air and rail freight are all used depending on size, destination and urgency. More detail on delivery and packaging.

Export documentation from our side is prepared as part of the shipment. Responsibility for import clearance, duties and inland delivery depends on the agreed Incoterm, which is stated in the quotation. If your organisation has a preferred freight forwarder we can ship on your nominated account.

Electrical supply of the specified voltage and phase, adequate floor loading and anchoring provision, sufficient ceiling height for the platform at full extension plus the payload, HVAC capacity for the heat servo drives reject into the room, and an access route large enough for the crated assembly.

All of these are confirmed in writing during the project. The access route is the one most often overlooked — door widths, corridor turns and lift capacity are worth checking early rather than on delivery day.

It scales with platform size and dynamic rating, and the figure for your configuration is stated during engineering. For scale, one of the largest vehicle simulator configurations we have delivered draws 28 kVA and is built to IP55; a small precision positioning platform is a fraction of that.

Larger platforms generally require a three-phase industrial supply. If your site has a constraint — single-phase only, or limited spare capacity — tell us at enquiry rather than at installation, because it can change the configuration we recommend.

Most platforms do, because dynamic reaction forces are transmitted into the foundation. Anchoring provision and floor loading requirements are stated with the configuration. Where anchoring is genuinely impossible, tell us early — it is a design input, not something that can be resolved on the delivery day.

Servo drives and motors reject heat where the platform is installed, and on a large or heavily used installation that is a real thermal load for the building services calculation. The figure for your configuration is provided during engineering. It is worth raising with your facilities team early — it is one genuine advantage a remote hydraulic power unit has, and it should be planned for rather than discovered.

Installation scope is agreed per project and ranges from documentation and remote guidance through to on-site installation and commissioning by our engineers. Because site conditions, foundations and host systems differ, this is defined in the project documentation rather than assumed either way.

Yes, where it is included in scope. Training normally covers operation, routine maintenance, safety functions and basic fault diagnosis, and can be delivered on site during commissioning or remotely. Specify who needs training and how many people during quotation so it can be costed properly.

08 · After delivery

Support, spares and what happens in year eight.

Remote engineering support for diagnosis and configuration, spare parts supply, software updates and on-site attendance where contracted. Because the cylinders, controller and software are ours, support is not gated by a component supplier's escalation process.

Directly from us. We can recommend a critical spares holding at handover based on your utilisation, which is worth doing where the platform supports scheduled training or testing. Because we manufacture the cylinders, replacement units do not depend on a third party's production schedule.

Part identification uses the component codes in the documentation set issued with the platform; if you no longer have it, the downloads page lists what was supplied and how documents are versioned.

Yes. Control software is developed in-house, so corrections and improvements can be issued for delivered platforms. Whether an update is applied is your decision — on qualified or validated installations, customers frequently choose to freeze the software version deliberately, and we support that.

Because we design and manufacture the cylinders and controllers, we are not dependent on a third party's product lifecycle for the critical items. Where commercial components eventually become obsolete, we identify replacements. If a formal availability commitment is required for your procurement, ask for it to be written into the contract.

Within limits. Payload interfaces, control software behaviour and safety configuration can often be adapted for a new task. What cannot be changed is the mechanism itself — axis count, geometry and actuator rating are fixed at build.

If a future change of use is plausible, it is worth stating at specification stage, when accommodating it may cost very little.

Relocation is feasible and reasonably common. The moving assembly must be mechanically locked for transport, the new foundation and anchoring checked against the original requirements, and the platform recalibrated and retested after reinstallation. We can supply the procedure or attend, depending on scope.

Sometimes. Control system and actuator replacement on a third-party or ageing platform is possible where the structure is sound and the geometry can be established. It is assessed case by case, and we will tell you if the honest answer is that a replacement platform makes better economic sense than a retrofit.

Deliberately not here. Working principles, mechanism design, axis and drive selection and sizing each have a dedicated guide in the Technology section, with their own question sets. This page covers only the questions that span a whole project relationship rather than a single technical topic. The map below shows where each topic lives.

If the sticking point is a single term rather than a whole topic — gross moving load, duty cycle, tilt coordination — the glossary defines 87 of them, each with a note on how else the term gets used.

Questions answered elsewhere on the site

Where Each Kind of Question Lives

Every topic guide carries its own question set. Keeping them there means one authoritative answer per subject rather than two competing versions — and it means the answer sits next to the explanation that gives it context.

Working principle

How a 6DOF Platform Works

Degrees of freedom, actuator coupling, kinematics, feedback, workspace limits.

Mechanism

Stewart Platform Design

Attachment geometry, topology, joint selection, workspace calculation.

Selection

3DOF vs 6DOF

Which axes you actually need, what tilt coordination can and cannot do.

Selection

Electric vs Hydraulic

Drive technology, where each still wins, retrofit and cost of ownership.

Specification

Payload, Stroke & Acceleration

Gross moving load, centre of gravity, inertia, duty cycle, margin.

Procurement

How to Choose a Motion Platform

Decision sequence, supplier qualification, RFQ contents, comparing quotes.

Suppliers

Motion Platform Manufacturers

Market categories, evaluation criteria, how to verify a supplier’s claims.

Integration

Controller & API Integration

Protocols, update rates, SDK, host interface, safety chain ownership.

Reference

Terminology & Documents

Glossary, certifications, catalogue and specification tools in one place.

Not answered here or anywhere else?

Send Us the Question

This page exists because the same questions kept arriving by email. If yours is not on it, that is useful information — send it and we will answer directly, and if it is likely to come up again it gets added here. Technical questions are answered by engineers, and asking one does not put you into a quotation process.

Questions we answer fastest

These come back within a working day, usually with a real answer rather than a holding reply:

Whether a requirement is within the electric envelope

Roughly what platform size a payload implies

Which requirement is driving your cost

What is missing from a draft specification

Whether a retrofit or a new platform makes more sense

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