extremely slow cutting speed
insufficient acetylene pressure
the tip being hold too high
too much cutting oxygen pressure
tip too close to the cut surface
too much travel speed
less oxygen pressure
smaller size cutting nozzle
less preheating flame
impure cutting oxygen
too slow cutting speed
thickness of metal to be cut
purity of oxygen
duration of cut
type of cutting blowpipe
Input amperage
Output amperage
Open circuit voltage
Closed circuit voltage