Posted by Gordon England (62.252.0.12) on 21:49:22 02/06/06
In Reply to: Re: key process variables for APS posted by becky
Hi Becky
I would first choose voltage readings. On most modern constant
current power supplies, voltage is dictated by the resistance of
the plasma gases and nozzle/electrode geometry. Voltage is not
normally a set parameter (assuming plasma gas flows are the
primary setting). Voltage readings straying from normal range
will indicate problems (nozzle/electrode wear, water/gas leaks,
plasma gas flow problems).
Next would be powder feed rate and then gas flow rates
(including carrier gas).
Best regards Gordon
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