From coil to finished part: a fully automated workflow
When the brief calls for tens of thousands of identical precision parts in 0.05mm stainless steel, the process behind the cut matters as much as the cut itself. Datum’s fully automated coil-to-part laser system is built for exactly that challenge
The problem with sheet-fed production at scale
Sheet-fed laser cutting has served precision fabricators for decades. Load a sheet, cut, unload – repeat. But when a customer needs half a million connector tabs, or a continuous supply of stainless shims for an assembly line running three shifts, the economics of sheet-fed production start to work against everyone in the chain.
Each sheet changeover is a pause. Each manual handling step introduces the risk of surface scratches. Each stack of blank sheet stock tied up on the factory floor is working capital doing nothing. For low-volume, high-mix work, these inefficiencies are tolerable. For high-volume miniature components, the kind measured in parts-per-hour rather than parts-per-day, they become the ceiling on what’s achievable.
What coil-to-part laser cutting actually means
In a coil-fed setup, thin metal strip arrives wound on a spool, exactly as it leaves the rolling mill. That coil feeds continuously into the laser cutting station, which processes it in a single uninterrupted run. There is no sheet to load, no sheet to unload, and no gap in production between one component and the next.
Datum’s process takes this further by integrating auto-stacking at the exit of the laser cell. As parts are cut and stacked automatically, arriving at inspection already ordered and ready to count. The result is a genuinely lights-out production capability for the right part geometries.
The four stages of Datum's automated process
01
Coil loading and feed control
02
Continuous laser cutting
03
Auto-stacking and collection
04
Quality inspection and dispatch
How it compares: coil-to-part vs conventional approaches
| Criterion | Sheet-fed laser | Stamping / tooling | Coil-to-part laser (Datum) |
|---|---|---|---|
| Tooling cost | None | High - hard tooling required | None - program-driven |
| Setup time per run | Moderate (sheet loading) | Significant (tool changeover) | Minimal - coil load and run |
| Changeover for new geometry | New program only | New tool - days to weeks | New program only - hours |
| Surface quality | Risk of handling marks | Excellent for high volumes | Scratch-free, oil-free finish |
| Minimum feature size | Limited by sheet handling | Limited by tool geometry | Sub-millimetre features achievable |
| Material thickness range | Wide | Limited to tool spec | 0.05mm - 0.5mm |
| Cost per part at volume | Moderate | Low at very high volume | Low - no tool amortisation |
The comparison above explains why coil-to-part laser cutting occupies a specific and valuable niche: it delivers stamping-like economics for high-volume production runs without the capital commitment or lead time of hard tooling, and with far more flexibility when designs iterate.
Materials that run on Datum's coil system
Datum’s coil-to-part process is optimised for the thin, high-performance alloys most in demand across medical, battery, aerospace, and electronics manufacture. Currently supported materials include:
- 304 Stainless Steel (PhD) : 0.05 – 0.50mm
- 301 Stainless Steel (Tension FG) : 0.05 – 0.20mm
- 304 Fine Grain Stainless (Datum FG) : 0.08 – 0.25mm
- Nickel 200 / 201 : 0.05 – 0.50mm
- Nickel-coated steel : 0.05 – 0.50mm
- Nickel-coated Copper : 0.05 – 0.50mm
- Aluminium : 0.10 – 0.5mm
Where coil-to-part laser cutting delivers the most value:
Battery connectors & tags
High-volume laser cut tabs, strips, and bespoke connectors in nickel and stainless steel. Consistent geometry across millions of parts is non-negotiable in cell assembly.
Medical device components
Ultra-thin stainless parts for implantable and disposable devices.
Precision shims & spacers
Thousands of identical shims to tight thickness tolerances – for gearboxes, bearings, optical assemblies, and anywhere stack height is controlled to microns.
Power generation parts
Rotors, stators, and electrolyser components where dimensional consistency across the full production run directly affects system performance.
Aerospace & defence
Coil-fed production ensures batch consistency that sheet-fed processes struggle to guarantee.
Electronics & technology
Why "automated" is doing real work in this context
Automation in precision manufacturing is not just about speed – it is about removing the variance that comes with human intervention in the process loop. Every time an operator handles a part between operations, they introduce a variable: a fingertip, a moment of inattention, a slightly different grip. At low volumes, these are manageable. At high volumes, they compound.
Datum’s coil-to-part system is designed to keep human hands off the product from coil entry to stacked output. The same part cut at position one of a run is dimensionally indistinguishable from the part cut at position fifty thousand. That is what automation actually delivers – not just throughput, but the kind of statistical process control that underpins ISO 9001 certification and satisfies the incoming inspection teams at demanding OEMs.
From prototype to production: the Datum pathway
One of the structural advantages of laser cutting, coil-fed or otherwise, is that the programming is software, not steel. A component designed for prototyping on Datum’s system is already designed for production. There is no re-tooling step, no change in process physics, and no re-qualification of a new manufacturing method when volumes ramp.
This matters enormously during product development. R&D teams can iterate on geometry, adjust feature sizes, and test multiple design variants without committing to hard tooling for any of them. When the geometry is finalised and production volumes are confirmed, Datum simply moves the program to the coil-fed cell and begins the production run. The prototype parts and the production parts are made the same way, on the same equipment, by the same process team.
Technical specification summary
- Component footprint: Up to 690mm²
- Material thickness: 0.05mm to 0.5mm
- Typical materials: 301 and 304 stainless steel, nickel alloys, nickel-coated copper, aluminium, Alloy 42
- Surface finish: Scratch-free, oil-free - suitable for medical and electronics applications
- 3D features: Available via micromachining as a second operation after laser cutting
- Quality system: ISO 9001 certified
- Lead time: Rapid prototyping and short lead times on production runs
The bottom line for procurement and engineering teams
If you are evaluating suppliers for high-volume miniature metal components, particularly in the 0.05mm to 0.5mm thickness range, the process behind the quote matters as much as the price on it. A supplier running your parts sheet-fed with manual handling is not the same proposition as a supplier running them on a fully automated coil-to-part cell, even if the price per-part looks similar at first glance.
The coil-to-part route delivers lower risk of surface damage, better statistical consistency across large batches, faster production cycles for repeat orders, and a natural path from prototype to volume without process re-qualification. For the right component, and the right volumes, it is fundamentally a better answer to the manufacturing problem.
Datum has been building that capability, and refining it, across decades of precision component manufacture.
Ready to discuss your component requirements?
Submit your drawing or specification to Datum’s engineering team and receive a quotation within 24 hours. Prototype quantities through to full production runs.