Manufacturing Development
Compact CNC Cells for Small-Part Manufacturing
Right-sized machining and connected production for American manufacturing
Small parts deserve a manufacturing process built around their size, features, and production needs. A zinc or aluminum die casting may need only a finished perimeter, a few drilled holes, and threads before it is ready for assembly. The opportunity is to bring those operations together in a compact, coordinated production system.
At WPM, we’re exploring compact CNC cells as part of our focus on manufacturability and domestic manufacturing. Building on the original Wallasch compact-mill development, the concept combines small machining modules with organized part handling and a clear path from casting to finished component.
The goal is straightforward: make small-part production more practical to establish, operate, and expand close to the businesses that depend on it.
What we mean by compact CNC
Compact CNC describes computer-controlled machining equipment sized for a smaller working area and a defined range of parts. Depending on the machine and tooling, that can include milling, drilling, and threading.
The term “micro milling” is sometimes used loosely for small machines. True microscale milling refers to machining very small features with specialized tools and process controls. A compact machine’s footprint alone does not establish that capability.
Our focus here is compact CNC for small components, especially the secondary operations that turn a die casting into a usable production part. Required tolerances, surface finishes, materials, and cutting forces determine whether a particular machine is suitable.
From casting to finished component
A successful manufacturing cell begins with the entire part journey. The proposed flow connects:
- 01
Cast and extract
Form the component and remove it from the die.
- 02
Convey and trim
Move the casting to the next operation and remove the sprue, runners, and other excess material as required.
- 03
Locate and palletize
Position the part in a repeatable fixture or carrier for machining.
- 04
Mill, drill and thread
Finish the required perimeter and features using a machining sequence matched to the drawing.
- 05
Unload and package
Remove the finished component and prepare it for its next destination.
Inspection, cleaning, and deburring belong wherever the part and process require them. The final sequence also needs to account for casting temperature, material variation, and the condition of each surface used to locate the part.
Planning these steps together helps reveal where a simple design change, better fixture, or different handling method could make the whole process easier to run.
Configuration under development
The 20-module cell concept
One configuration under consideration brings 20 compact machining modules into a rack-based cell. Multiple modules could machine separate parts in parallel, with coordinated loading and unloading.
That arrangement creates options. Modules could repeat a common operation across a part family or support different machining steps where the equipment and routing allow. Capacity could be developed in stages as the process and demand become better understood.
The number of modules is a layout concept. Actual output depends on the complete system: cutting time, loading time, tool changes, inspection, availability, and the pace of the surrounding operations. A shared loader or downstream station can limit the output of an otherwise capable group of machines.
The rack layout also has to provide practical access for service, tool replacement, chip removal, and safe operation. Compactness is useful when the equipment remains workable on the shop floor.
Why this approach is exciting
Compact machining and cellular manufacturing have established histories. The opportunity is in applying those ideas to a specific production challenge and making coordinated automation more accessible for suitable small-part work.
A closer fit between equipment and component can make it easier to organize production around the part. Parallel machining offers another way to build capacity. Connecting handling with machining can reduce repeated manual transfers when the process supports it.
Just as important, a modular approach creates a manageable way to learn. An individual operation can be tested before a larger cell is committed. Fixturing, cutting strategy, handling, and inspection can be evaluated together, using actual parts and measured results.
For WPM, that combination is compelling: a manufacturing approach that can be developed around real component needs, with a clear relationship between product design and how the product will be made.
Make the part manufacturable first
The strongest opportunity starts at the drawing.
Which features can be produced in the casting? Which need machining? Can the part be held securely without distortion? Can a tool reach the required surfaces? Are the tolerances appropriate for the function?
Those decisions influence equipment selection, cycle time, inspection, and cost. A small change to a locating surface or tool-access feature may matter more than adding another machine.
A credible production case must also include tooling life, maintenance, scrap, changeovers, labor, and total operating cost. Trials need to establish repeatable quality and realistic cycle balance. Each application requires appropriate guarding, controls, and a safety assessment before operation.
A practical path toward domestic production
WPM’s focus is manufacturability and domestic manufacturing: helping make the connection between a part that works and a process that can make it consistently.
Compact CNC cells are one avenue toward that goal. For suitable components, they could support a more practical domestic production plan by bringing part design, casting, machining, and handling into one coordinated discussion.
The concept is under development. Equipment configuration, performance, and commercial suitability must be established for each application.
A small part with a bigger production challenge
Start with the component, its material, the features that matter, and the expected demand. Together, we can examine where compact machining and connected handling may fit into a practical manufacturing approach.
Talk with WPM