Five shells, no screens on
This is our assembly floor at four in the afternoon. A 2 m shell on the left, a 1.5 m one behind it, a 1 m unit in front on castors, two more against the pillar. They are matte black, unlit, cables taped to the base plate, and there is a fan running behind them because that corner of the workshop gets warm. Nothing here is finished. They are queued for the ageing bay, where each one will sit powered up for three days before anyone decides it is good enough to pack.
People see the marketing photo — the globe glowing with a world map in a bright atrium — and assume that is what we make. What we actually make is everything in this picture first: cabinets, jigs, tolerance, and a lot of waiting.
The shell is not a sphere yet
A sphere is not a flat panel bent into a curve. Each latitude band has its own radius, and the band above it has a different one, so every cabinet is a separate part number. A 1.5 m shell splits into 24 aluminium cabinets across six bands. Ask for the pole caps flush and you are cutting eleven moulds instead of six, which is exactly the line item that makes one quote 40% higher than the next one for the same diameter.
The moulds are the part nobody can shortcut. If the press tool is rough, the cabinet edges do not butt cleanly, and on a sphere every seam is visible from somewhere in the room. There is no angle you can stand at where a bad seam hides.
Where the seams get killed
The cabinets go into a steel jig before any module touches them. Dry fit first, no LEDs, no power — just aluminium against aluminium. A 0.3 mm shim is the tolerance we work to across a full band, and the check is embarrassingly low-tech: run a fingertip along the joint from the inside. You feel a step long before you see one.
If the dry fit fails, the band comes apart and goes back to the bench. Nobody argues about it, because pulling a shell apart after 40,000 modules are glued in is a different kind of bad day.
Modules, and why the pitch is your decision, not ours
A 1.5 m shell is roughly 7 m² of surface. With 405 × 405 mm modules that is about 43 of them, and the same cabinet takes P1.5 through P5 without changing the tooling. The pitch is set by where people stand: P2.5 for a lobby where the nearest viewer is 3 m away, P1.5 when someone can lean in and read text on the equator.
Same shell, same structure, different module. The price difference between P1.5 and P2.5 on a 1.5 m globe is roughly a third, and it buys you nothing if nobody ever gets closer than four metres.
The file nobody asks for
Every sphere ships with a pixel map. It is a file that tells the controller which physical cabinet sits where when the surface is unwrapped into a flat rectangle — without it, a video feed crawls around the globe in a spiral instead of running top to bottom. Buyers rarely ask about it at the quotation stage. They ask about it three months later, when they want to change the content and the integrator has moved on to another project.
Ask for the map file and the receiving-card addressing sheet at handover. Both should come with the sphere. If a supplier hesitates, they were planning to charge you for it later.
Seventy-two hours of nothing happening
Ageing is deliberately dull. The shell runs at full brightness in eight-hour cycles for three days — content cycling, grey ramps, then a black frame to let the drivers cool. Roughly 80% of the failures we ever see happen in the first hundred hours of run time, mostly single dead pixels and one bad receiving card. Finding that on our floor costs us a module. Finding it in a Dubai mall costs the client a scissor lift.
After the run, we re-check the pixel map against the physical shell, because a card swap during ageing renumbers things. Then it is packed.
Crating a ball
A sphere up to 2 m ships assembled, in a plywood crate with foam cradles cut to the curve — not flat-packed, because re-assembling a shell on site is how you get a globe with a visible waist. The crate is bulky and the volumetric weight usually beats the actual weight, which is why sea freight for a single 1.5 m unit is often the thing that shocks people at the invoice stage.
Above 3 m, the shell is designed to split into transportable segments with machined locating pins, and we send a commissioning engineer or work with your integrator on site. That is a different quote.
So what does this mean when you are ordering
Three to four weeks for a stock diameter, five to six for a custom one — the difference is almost entirely moulds. If a supplier quotes you ten days on a non-standard diameter, ask how many cabinet radii they are actually cutting. That question tells you more about the final look than any spec sheet will.
And if you are ever in Shenzhen, come and stand on this floor. The shells are usually unlit and covered in tape, and it is a much more honest picture of what you are buying than the rendering.