First Article

By Previn Naidu, Mr

A practical floor note on first-cut approval for teams that want cleaner starts around the CNC table.

The first finished sample sets the tone for the whole batch. If the cut depth, feed setup, edge quality or hole position is off, the waste adds up fast. First Article is our note for workshops that want to sign off the first part properly.

First Article only matters if the first finished part is checked against the drawing, the setup sheet, and the material on the bed. On a router, mill, or plasma table, that means recording the actual cutter used, the zero position, and what the edge or hole looks like after the first run. If this note speaks to the issue in your shop, use the contact form and mention first-article so we can place your query against the right CNC note.

First-part sign-off points

• Drawing revision matches loaded program
• First cut photo with edge detail
• Tool number and offset recorded clearly
• Inspector name and shift noted

Use this note alongside the relevant machine pages if the job moves between router, mill, or plasma processes. First Article is about the approval step on the first completed component, not a general machine overview. That split helps operators, setters, and supervisors read the same job in the same way.

Batch release after first cut

First Article is about checking the first finished part before the rest of the job runs. On a CNC floor, that first approval helps catch drawing mistakes, setup errors, or tool issues before material is wasted across the whole batch.

Begin with the material and thickness that are actually on the machine. MDF, plywood, aluminium plate, mild steel sheet, and plastic board all show problems differently once the first part comes off the table. In South African shops, heat, dust, coastal corrosion, and power interruptions can all change how confidently that first component can be released.

Measure the first finished part before the next sheet or plate is loaded. Check cut depth, outside size, hole position, slot width, burr, edge burn, and whether the vacuum hold-down or clamping left any movement marks. One saved sample with notes often prevents a repeat setup error later in the shift.

Workshop conditions that change results

A first-part check in Johannesburg may focus on dust extraction, cabinet cleanliness, and repeatability over long production days. In Durban or Cape Town, moisture and corrosion can affect consumables, bare steel stock, and machine cleaning routines. The approval step should reflect the site, not just the drawing.

After load-shedding or an unplanned stop, re-home where required and inspect the next first piece as if the setup has changed. Rails, sensors, torch height control, spindle collets, and vice clamping can all shift enough to show up on the part. The safest habit is to treat the restart sample as a fresh sign-off item.

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