Reflow
Scale Up
A sensible SMT route for scaling output on South African factory floors, aimed at teams who know the work already.
How Scale Up changes reflow setup for larger board volumes
Scale Up on the reflow side deals with a line that must carry more boards per shift without drifting out of profile. Once output climbs, conveyor spacing, soak consistency, unload handling, and inspection frequency all need tighter control than the earlier run rate.
Begin with board dimensions, copper load, paste type, and the target count per shift. In Gauteng, airborne dust around conveyors and magazine loaders can add nuisance stops, while Durban and Cape Town humidity can alter paste behaviour and storage discipline. Planned power cuts, generator changeover, and collection times for finished assemblies should be stated in the brief because they affect how ramp checks and sample boards are scheduled.
Photograph the oven entry, exit, and buffer points before any speed change is made. Keep a printed note with the current recipe, confirmed conveyor width, and the last acceptable profile beside the line or with the job pack. That record helps the next shift spot whether defects started after a throughput increase, a paste change, or a feeder rearrangement.
Higher-volume reflow handover
The outcome should be a usable production note covering oven settings, checks between batches, and the point where handling starts to bottleneck. One clear record for the actual board, actual paste, and actual shift pattern is more useful than a stack of generic capacity notes.
Link the scale-up request to the matching reflow profile note and the latest board-specific record before any wider change is approved. Check labels, traceability entries, and packed quantities again when cartons leave the line, especially after overtime or a second shift. SMT line enquiries should name the board type, the placement volume and the machines already on the line.
- Oven recipe checked at higher throughput
- Infeed, peak, and exit photos logged
- Check Lines, Reflow, and Board notes before increasing board count.
- Email trail tied to one board
South African production constraints
Factory planning here often has to fit around dispatch cut-offs, generator fuel windows, and mixed-age equipment in established industrial units. Many teams are expanding a live line, not fitting out an empty site, so the note must reflect current bottlenecks such as manual loading, limited buffer space, or inspection lag. State whether the increase is for a short production push, a standing order, or an export lot moving through OR Tambo.
At the coast, moisture control around paste storage and opened reels becomes more important when output rises and material stands longer at the line. Inland sites usually need stricter cleaning of sensors, fans, and covers as dust builds during long runs. Where power interruptions are part of the week, record exactly when the profile verification board was run and whether the oven had fully stabilised after restart.
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Volume-rise inputs before profiling
Send the Scale Up brief with line photos, ramp timing, and what has already failed under load. Use a subject line that reflects the increase in volume.
Send the board name, panel size, oven make and model, present boards per hour, target output, and the defect that appears once the rate increases. Add line photos, profile data if available, and note what has failed under sustained loading, such as tombstoning, dull joints, skew, or incomplete wetting. A brief written that way gives enough detail to assess whether the issue sits with heat transfer, handling, stencil deposits, or line balance.
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