Step 1 – Start from Motion Requirements, Not Model Numbers

Before you open a datasheet, write down five things for each axis: X, Y, Z (and θ if you have rotation).

1. Stroke and Travel Envelope

What is the usable stroke?

How much extra do you need for homing, over-travel, and future product variants?

A lot of budget is burned on over-long ball screws that never get used.

2. Load and Moments

Static mass (tooling + workpiece + fixtures)

Dynamic mass (does anything extend or retract?)

Centre of gravity relative to the carriage (lever arms → moments)

This decides the required size of the W-Robot linear module much more than “target speed”.

3. Speed and Acceleration

Required cycle time per move

Maximum allowed jerk and vibration for the process (e.g. for vision or weighing)

Short strokes with aggressive acceleration may point to a linear motor; long strokes with moderate dynamics may favour a belt.

4. Accuracy and Repeatability

Be brutally honest:

Does the process really need ±0.01 mm, or is ±0.05 mm enough?

Is absolute accuracy required, or only repeatability? (Vision systems often relax mechanical accuracy.)

Over-specifying here cascades into more expensive screws, bearings, motors and drives.

5. Environment

Dust, chips, coolant, oil mist, or close to a clean environment?

Any washdown or solvent cleaning?

This is where you decide between open, semi-enclosed and fully enclosed designs.

Only when you have these five points can you make sensible choices between ball screw, belt, or linear motor — and between different W-Robot series.

Step 2 – Know Your W-Robot Building Blocks

Think of the 威洛博 W-Robot portfolio as a box of industrial LEGO. You don’t need every piece; you just need to pick a coherent set.

2.1 Ball Screw Linear Modules – Precision and Stiffness

These are the backbone for high-precision axes and Z-axes in a multi-axis linear actuator.

Typical use:

Vertical Z-axes with heavy tools

Medium-stroke X/Y axes where rigidity matters

Short, accurate positioning stages in inspection or assembly

Families you’ll often see in designs:

Compact ultra-thin modules for short stroke axes

High-rigidity series (VC / VF style) for heavier loads

Fully enclosed series (VGTH style) for dusty or oily environments

Common features:

Ball screw drive combined with linear guide rail

Good balance of thrust, stiffness and repeatability

Easy integration with servo motors for closed-loop control

2.2 Timing Belt Linear Modules – Long Stroke, High Speed

Whenever you see strokes beyond 800–1000 mm and moderate precision requirements, a belt drive usually wins.

Good roles:

X-axis of a large 2-axis gantry stage

Transfer axes over conveyors or machine rows

Base axes in palletising systems

W-Robot belt modules (EB, OB, VETB styles, etc.) typically offer:

Long stroke with compact motor sizes

Lower moving mass than long ball screws

Enough accuracy for most linear module for automation tasks

2.3 Linear Motor Modules – When Dynamics Are the Bottleneck

Direct-drive modules (VL / VGL style from W-Robot) remove the screw or belt entirely.

Use them when:

You need very high speed and very smooth motion

The process is sensitive to backlash and micro-vibrations

You want a premium axis in an XYZ linear module platform (e.g. high-speed vision inspection)

They are perfect as X or Y axes in a hybrid system where other axes remain screw or belt driven.

2.4 Electric Cylinders and Robot Grippers – The Business End

A multi-axis platform is useless without an end effector.

W-Robot offers:

Electric cylinders for vertical motion, clamping, and pressing

Robot grippers and electric grippers for handling parts

Using end effectors from the same ecosystem simplifies:

Mounting interfaces

Load ratings

Spare parts and support

Together, these modules, cylinders and grippers form a consistent toolkit for building complete multi-axis linear actuator systems.

Step 3 – Three Reference Architectures You Can Steal

Let’s get concrete. Most real projects fall into one of three patterns.

3.1 Architecture 1: From Single Axis to Small XY Stage

You might start with a single axis, for example:

Push fixtures into a test station

Move products under a camera

Index a conveyor lane

Design logic:

Stroke < 600 mm and accuracy important → use a ball screw linear module

Stroke > 800 mm and accuracy moderate → consider a belt module

Later, when you upgrade to an XY stage:

Use the existing X axis as the base.

Mount a shorter ball screw module as Y on top.

Add an electric cylinder as Z if needed.

Because the modules come from the same W-Robot family, mounting patterns, heights and motor options are compatible. Your “simple X-axis” evolves smoothly into a small XYZ linear module platform.

3.2 Architecture 2: Classic 2-Axis Gantry Stage for Pick-and-Place

Scenario:

Feeding multiple CNC machines

PCB depaneling or loading

Packaging or palletising over a large area

A robust recipe looks like this:

X-axis: a long timing belt module (EB or OB type) forming the cross-beam

Y-axis: a medium-stroke ball screw module riding on the beam

Z-axis: an electric cylinder with a W-Robot robot gripper at the end

Why this works:

The belt X-axis provides lightweight long stroke for the gantry.

The ball-screw Y-axis adds stiffness and positioning accuracy.

The Z electric cylinder handles vertical motion and pressing without overcomplicating the design.

Things to watch:

Beam stiffness: undersized X beams are the #1 reason a 2-axis gantry stage shakes.

Cable routing: make sure drag chains for X, Y and Z don’t fight each other.

Synchronisation: if you ever go to a dual-drive X (two modules in parallel), plan for electronic gearing or a virtual master axis in the motion controller.

3.3 Architecture 3: Full XYZ Linear Module Platform

For more complex tasks – multiple processes, inspection, assembly – you end up with a three-axis system.

A pragmatic template:

X-axis (base)

Long stroke, e.g. 800–2000 mm

Belt-driven W-Robot module sized for your payload

Y-axis (bridge)

Medium stroke 300–800 mm

Ball screw linear module (VC / VF style) for stiffness and precision

Z-axis (vertical)

Short stroke, 50–300 mm

Electric cylinder or compact ball screw module

Optional rotation axis (θ) using a rotary module or motor

This combination gives you:

Clear role separation: X moves across the area, Y positions, Z handles height.

Cost control: only axes that truly need high precision use ball screws or linear motors.

Easy scaling: you can extend X, widen the work area, or add more tools on the same XYZ linear module platform.

Step 4 – Mechanical Details That Make or Break the System

On paper, almost any configuration works. In real machines, small details decide whether your platform feels “rock solid” or “nervous”.

4.1 Prioritise Rigidity Over Theoretical Accuracy

Catalogs love to print repeatability numbers like ±0.01 mm. But for gantries and stacked axes, rigidity often matters more.

Check:

Maximum allowable Mx / My / Mz moments for the module

Distance between guide blocks (support span)

Beam deflection under load

Especially for gantries:

Ensure both parallel X modules (if used) are mounted on a flat, aligned surface.

Don’t use the smallest possible profile “because it just fits the load” — add margin for dynamic effects.

4.2 Cable Management Is a First-Class Design Task

Cable chains are not an afterthought. Poor routing can:

Limit stroke

Increase drag

Hit the W-Robot linear module at speed and cause vibrations

Basic rules:

Avoid S-shaped paths where cables bend in opposite directions.

Respect minimum bend radius for all cables and tubes.

Lay out drag chains in 3D CAD early, not at the last minute on the shop floor.

4.3 Standardise Where You Can

Using one or two W-Robot series across a line has big benefits:

Fewer spare parts to stock

Maintenance teams become familiar with one mechanical “personality”

Easier to swap axes in emergencies

For example, you might decide:

All medium-load ball screw axes → one VF-style series

All long stroke belt axes → one EB-style series

That small decision pays off every time you expand or replicate the cell.

Step 5 – Don’t Ignore Motion Control and Safety

A multi-axis platform is half mechanics, half control.

5.1 Servo vs Stepper: Not Every Axis Deserves a Servo

Guideline:

Axes that need interpolation (e.g. X-Y motion in a gantry) → use servo-driven modules.

Simple up-down or clamp moves with modest speeds → stepper-driven electric cylinders may be enough.

This mix keeps performance high where you feel it, and cost under control where you don’t.

5.2 Motion Controller Capabilities

Your controller should comfortably handle:

Homing, limits, E-stop logic

Multi-axis interpolation (linear, circular if needed)

Feed-forward and jerk control for smooth motion

Monitoring: position error, following error, current limits

Remember: when you buy a multi-axis linear actuator solution, you usually buy an application note from your future self. The easier it is to commission and diagnose, the better that future will be.

A Simple Design Checklist (Print This Before You Freeze the Layout)

Before you lock in your design and send the BOM to purchasing, run through this list:

For every axis, have you documented stroke, load, speed, accuracy, environment?

Which axes truly require ball screw, and which can use belt or linear motor instead?

Does your gantry beam have sufficient stiffness for the heaviest moves?

Is the centre of gravity of your stacked axes reasonably close to the main guide rails?

Are the chosen W-Robot series as unified as possible to simplify spares?

Does your motion controller support the interpolation and synchronisation you need?

Have you checked drag-chain paths in 3D, including max extension and retraction?

Do any axes sit in dusty or wet zones that call for semi-enclosed or fully enclosed modules?

Are your robot grippers and electric cylinders mechanically compatible with the sliders?

Do you know the cost of one axis failure, and have you chosen protection levels accordingly?

If you can answer these ten questions clearly, your design is already far ahead of the “just pick some modules” approach.