Mining and heavy equipment generate a particular kind of scanning problem: the part is large, it is worn, it is usually still in service, and the original drawings either never existed or left with a supplier two decades ago. Industrial 3D scanning solves that by measuring what is actually there, to a known accuracy, so a replacement can be made to fit the machine rather than to fit a drawing.

What gets scanned, and why

Wear parts with no drawings — liners, chutes, screens, crusher components and buckets where the pattern or die is long gone.
Obsolete castings — gearbox housings, pump bodies and manifolds from equipment no longer supported by the OEM.
Retrofit and interface work — capturing an existing machine so a new attachment, guard or platform can be designed to bolt straight on.
Wear measurement — comparing a worn component against its original geometry to quantify material loss and predict remaining life.
As-built plant capture — recording pipework, structures and equipment arrangements before a shutdown, so design work can proceed off measured geometry.

Accuracy, and what the number means

Scanner accuracy is quoted per measurement, but what matters on a large part is volumetric accuracy once many scans are aligned. Error accumulates through the alignment, so a 3 m bucket captured in forty overlapping scans does not hold the same tolerance as a 200 mm bracket captured in three.

The practical approach is to match the method to the tolerance the job actually needs. A mating face that has to seal wants tight local accuracy; the overall envelope of a chute liner does not. Stating the required tolerance up front — per feature, not per part — is what keeps a scan from being either useless or unnecessarily expensive to process.

Site conditions change the method

Surface finish — dark, wet or highly reflective surfaces scatter light. Scanning spray gives a consistent matte surface and is removed afterwards.
Vibration and movement — a component still bolted to running plant will not hold a reference frame. Either isolate it or use targets that move with it.
Access — internal geometry, deep pockets and confined arrangements often need a different approach from the exterior envelope of the same part.
Temperature — steel moves. A part scanned hot and machined cold will not match, and on large components the difference is measurable.

From point cloud to something you can manufacture

A raw point cloud is a measurement, not a model. For a worn part it is also a record of the damage, which is precisely what you do not want to reproduce. Turning a scan into a manufacturable part means deciding, feature by feature, what the geometry was designed to be:

Mesh — cleaned, hole-filled and decimated. Adequate for visualisation, clash checking and some direct manufacture.
Surface model — fitted surfaces following the scan. Suits organic or free-form shapes such as impellers and liner profiles.
Parametric CAD — the geometry rebuilt as features with nominal dimensions restored: round holes made round, worn faces returned to plane, draft and radii regularised. This is what you need for a drawing and a fabricator.

Deciding which of the three a job needs is the single biggest driver of both cost and usefulness. A mesh delivered where a parametric model was needed cannot be modified; a parametric rebuild delivered where a mesh would have done is effort spent for nothing.

What you receive

Deliverables are agreed before scanning: registered point cloud, mesh (STL or OBJ), surface or solid CAD (STEP or native), a deviation report where the job is a wear or conformance check, and a dimensioned drawing where the part is going to a fabricator. File formats are confirmed against what your downstream software actually reads, not assumed.

Where the goal is a working replacement part rather than a record, scanning is the first step of reverse engineering — the scan measures it, the CAD rebuild makes it manufacturable. For a broader overview of methods, outputs and accuracy across all sectors, see our 3D scanning services page, and for one-off replacement components, rapid prototyping.

Australian workplaces carrying out this work on operating plant do so under the model WHS framework maintained by Safe Work Australia and the corresponding state regulator; site access, isolation and permit requirements are agreed with your site before mobilising.