One Roof, One Datum: How Strongd Runs Robot Programs End to End

One-stop manufacturing is not a longer service list. It is one party accountable for the part from the first print to the last shipment - and one datum scheme that survives every process change in between.

What "one-stop" is supposed to fix

A robot program typically starts with a machined prototype, moves to a bridge batch, then to tooling and molded or cast parts, and ends in finishing and assembly. Split that chain across four suppliers and the part is re-quoted, re-datumed and re-inspected at every handover. Each handover is a place where a two-week delay hides, and where responsibility for a tolerance drift becomes a meeting instead of a fix.

One-stop manufacturing removes the handovers, not the processes. The value is continuity: the same critical feature list, the same datum scheme, the same inspection criteria, and one party who cannot point at the previous supplier.

1. The cost of splitting the chain

None of these failures is dramatic. Together they are why robot hardware programs slip.

2. The chain, in one building

Design and DFM. Drawings are reviewed before quoting: wall thickness, tool reach, corner radii, thread strategy, fixture planning. The review is free, and it comes back with the quote - not after a purchase order.

Prototype. Industrial SLA, SLS and MJF printing for form and fit; CNC machining in the final material for functional test. Three to seven working days, depending on geometry and finishing.

Bridge. Vacuum casting from silicone molds, 10 to 50 units per mold, five to ten working days from an approved master - enough to equip a pilot line or a demo fleet while steel is being cut.

Tooling. A 40-machine tooling division: high-speed CNC, engraving, mirror EDM, Sodick and GF slow wire-cut, grinders and a coordinate boring machine. Mold lead time 15–25 working days.

Molding and casting. 130 injection molding machines from 120T to 800T, including two-color capability and 15 ABB robots on automation; zinc die casting from 20T to 300T and aluminum from 300T to 2,200T.

Machining at volume. 85 CNC machining centers, 18 of them five-axis - 10 Mingcheng/Tianche, 8 Hardinge - plus 6 CNC lathes, for the parts that stay machined: joint housings, arm links, low-volume or high-mix families.

Sheet metal. Mitsubishi laser cutting, Amada CNC punching, bending and welding for frames, brackets and enclosures.

Finishing. Anodizing, electroplating, powder coating, spray painting, blackening, passivation, bead blasting, wire drawing, mirror polishing, CD-grain, laser engraving, UV spraying and silk-screening - in-house, so masking decisions stay with the people who machined the part.

Assembly and packaging. Sub-assembly, hardware installation and packaging to the customer's spec, so a shipment arrives as a build kit rather than a box of parts.

3. One datum scheme, carried across processes

The technical heart of one-stop is not the equipment list. It is that the datum scheme and the critical feature list are defined once, at prototype stage, and re-used at every subsequent process.

That matters most at the transitions:

Machined prototype → molded part: shrinkage, gate location and cooling move dimensions. If the same critical features are inspected to the same criteria, the drift is measured rather than discovered at assembly.

Machined → cast: draft and corner radii change, but the interface features - bore positions, sealing faces, mounting patterns - remain the reference.

Any process → finishing: coating thickness is added deliberately, and keep-clear zones were defined when the part was designed, not improvised at the coating line.

A robot is a stack of tolerances. One party holding the stack is worth more than any single machine on the floor.

4. One quality system, not four

The quality chain runs in seven stages across every process: incoming material inspection, process review by a three-person team averaging 18 years of experience, production planning against drawings and CMF, in-process inspection against the sample drawing, cosmetic and structural engineering review, daily 4:30 pm project follow-up, and pre-shipment OQC against the drawing.

Metrology is shared, which is the practical benefit: Hexagon CMM (TESA-MH3D-DCC), automatic 2D vision, 2.5D vision, X-ray, colorimeter and light transmittance testing, environmental chambers, UV and salt spray testers, and simulated transport vibration. A molded cover and a machined bracket are judged by the same lab, on the same day, against the same drawing.

Certification: ISO 9001:2015 and IATF 16949:2016, CE and RoHS, with an SGS factory audit completed in 2023.

5. Schedule compression, stated honestly

One-stop does not make individual processes faster. It removes the gaps between them.

The realistic gain is measured in weeks per program, not days per process.

6. Where the robotics focus shows

Robotics accounts for 48% of revenue, which shapes what the factory is set up to do: quadruped structural kits, humanoid joint modules, industrial arm links, dexterous hand components and robot vacuum chassis.

Those parts share a pattern - tight interface fits, light weighting, mixed materials, and volumes that start at one and may never reach a million. A one-stop supplier fits that pattern better than a specialist, because the process can change without the accountability changing.

7. What one-stop does not mean

It does not mean every part should be made in-house regardless of volume, and it does not mean the cheapest route. It means the route is chosen once, with visibility of the whole program:

If a part will be molded at volume, the prototype is designed with molding constraints from the start.

If a part stays machined because volume never justifies tooling, it stays machined - and the drawing is not forced into a molding template.

If a feature is outside our equipment envelope, we say so at quoting rather than at T1.

The honest version of one-stop is a partner who can move between processes and will tell you when not to.

8. Facility and contact

Shenzhen Strongd Model Technology Co., Ltd. was founded in 2012 and operates a 40,000 m² facility in Bao'an District, Shenzhen, with more than 2,000 employees. Services cover CNC machining, 3D printing, vacuum casting, thermoforming, tooling and injection molding, die casting, sheet metal fabrication, surface finishing, assembly and packaging. The company has exported for 14 years and serves more than 10,000 enterprises.

Website: https://www.strongdcnc.com/