Studio notes
First Article
A quick workshop note on first-off checks for shops that want cleaner CNC starts.
The first cut tells you plenty: toolpath, hold-down, feed, focus and material all show their hand early.
First Article is the pause before a full sheet run or laser batch starts. Focus on the first completed part, checking dimensions, edge finish and whether hold-down or focus needs correction before waste multiplies.
First-off checks on the bench
- Critical size measured from drawing
- Clean photo of the first part taken
- Tool number or laser settings recorded
- Operator and checker both noted
Use this note alongside the relevant router, laser or profile cell page when the sample part is being reviewed. The machine page explains the equipment. First Article deals with what to inspect once the first piece comes off the bed.
How First Article starts a profile cell job for Cape fabricators
First Article is about checking the first completed part before the rest of the batch follows. For CNC work, that first-off check is where size, edge quality, and setup errors are easiest to catch.
Material changes the first-off routine more than many shops expect. MDF can show breakout on the bottom face, acrylic reveals heat and focus issues quickly, and thin aluminium composite can expose poor vacuum support. In Somerset West and the wider Cape, coastal moisture can also alter sheet flatness and cut quality at the start of a run.
Keep the first part separate from the batch and mark it clearly. That sample becomes the reference for the next sheet, the next shift, or a repeat order after load-shedding interrupted production. A simple note near the CNC router or CO₂ laser helps the next operator see what was accepted.
What the sample part should show
A useful first article should tell you whether the file, material and machine agree with each other. Check fit on mating parts, inspect corners for burning or chatter, and confirm labels or hole positions before nesting the rest. One sound sample is worth more than discovering the same fault across twenty parts.
Before expanding the job, compare the approved sample against the drawing and the machine setup sheet once more. If anything changed during testing, write it down with the job file so the same settings are not guessed later.
- Approved part kept as run reference
- Edge condition checked in good light
- Cut sample on Routers, trim parts in Cells, file notes in Studio notes
- Job sheet updated with final settings
Cape workshop conditions that affect first-offs
Many small South African shops run mixed jobs through one machine in a day, so the first article must catch errors early. A cabinet component, a sign blank and a profile cell part will not share the same expectations for finish or speed. Extraction load, sheet delivery timing and staff changes between shifts all influence how carefully that first sample needs to be read.
Sea air around Cape Town and Somerset West can shorten the interval between lens cleaning and routine checks on exposed metal parts. Dustier inland sites may see different issues, especially on rails, covers and vacuum surfaces. Power interruptions also make it sensible to confirm zero positions and file versions before the first piece is accepted.
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Records worth keeping with First Article
A quick workshop note on first-off checks for shops that want cleaner CNC starts.
File the measured sample results while the job is still on the machine or bench. Note the material thickness, cutter or lens setup, and any change made after the first cut. That record is useful when the same part returns for another batch or a customer queries a dimension later.