From prototype and revision to pilot lot and repeat production
A prototype-to-production CNC decision should depend on more than order quantity. Use the prototype to verify function and fit; if testing calls for changes, return to drawing revision and review the affected features before deciding whether to proceed to a pilot lot.
- Prototype: define the function, fit and critical dimensions to verify, together with first-piece inspection and reporting needs.
- Revision: identify the new revision, changed features and effective scope; review affected dimensions, processes and inspection items before machining the next lot.
- Pilot lot: use the agreed revision and acceptance criteria to review whether first-piece, in-process, finishing and final inspection records support follow-on lots.
- Repeat production: confirm that the part number, revision, quantity and acceptance requirements still apply; return changes to revision review instead of carrying forward the previous lot's reference.
Common application areas
Semiconductor equipment, automation modules, robot mechanisms, medical devices and unmanned systems often require diverse precision parts in small quantities. These projects value delivery, documentation and engineering communication.
- Semiconductor equipment parts
- Fixtures and automation modules
- Robot mechanism components
- Medical and inspection equipment parts
- Unmanned vehicle and sensor modules
RFQ checklist before requesting a quotation
For prototype CNC machining in Taiwan or low-volume CNC machining in Taiwan, distinguish the current order from expected follow-on demand. Mark undecided items for confirmation so quotation, machining and inspection share the same reference.
- 2D drawing, 3D file, part number and governing revision; identify the controlling document if files disagree.
- Current project stage and quantity per part number, expected follow-on lots and target delivery date.
- Material and condition, finishing, cosmetic and assembly requirements; list undecided items separately.
- Critical dimensions, datums, first-piece approval needs, in-process and final inspection scope, and report format and timing.
- Revision differences, open questions, and engineering and purchasing contacts.
Four points to verify when evaluating a supplier
Supplier evaluation should establish how each handoff is documented, beyond comparing unit prices or machine lists. Engineering, purchasing and quality teams can use these four points together.
- Process fit: how are geometry and critical tolerances reviewed for turning, milling or mill-turn machining, including fixturing and inspection access?
- Drawing revision control: who confirms the governing revision, how are superseded files replaced, and which features need verification after a change?
- Inspection evidence: what is checked at first-piece, in-process and final inspection, and how do methods, sampling scope and reports identify the part and revision?
- Outsourcing and release: how are finishing requirements communicated, returned parts accepted, and responsibility assigned for documentation and final release?
Jintat's role
Jintat supports CNC turning, milling, mill-turn machining, finishing coordination and quality inspection, with Mitutoyo CMM and Keyence vision measurement supporting first-piece, in-process and final inspection. Measurement methods are reviewed against part features and project requirements; specified critical dimensions can be reported on request. Align the drawing revision, critical features and acceptance criteria during the RFQ review before assessing machining and finishing arrangements.