Key components explained
Heating zones: preheat (≤300℃) + high-temp reflow (≤350℃); some tools support 400℃ high-lead solder.
vacuum
Radiant heat retention (e.g. German SXX top/bottom chamber heating);
Vacuum pump choice: oil-sealed pumps (Busch R5 series) need regular oil changes; oil-free pumps are easily fouled by condensed flux.
vacuum - PCB 100mm×50mm
Fault early warning:
Rail deformation: aluminium alloys distort at high temperature causing a "flare" effect - calibrate regularly.
