troubleshooting tips for powder applications

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Issue Time: Dec 9,2010

powder guns

No high-voltage

1)loose cable contact tighten

2) broken cable replace cable

3) cascade failure replace cascade

poor charging (powder does not adhere to substrate)

powder clumping on electrode clean ,check rinsing function

bad contact tighten threaded sleeve

high-voltage too low clean contact ring and contact pin

grounding check for proper grounding

Powder is blown offer

spray velocity too high set correct air volume

distance gun too close to part increase gun distand

irreguar spraying

flat jet nozzle worn check air volume , replace

electrode holder worn check air volume ,replace

sputtering

spray velocity too low reset defector plate rinsing air

poor compressed air quality check compressed air network

powder tends to clump contact powder manufacture

powder system elements

high powder loss , poor separation performance (hopper under cyclone leaking )

check seals , check fliter performance

exhaust air volmue too low (check recommended pressure, sealing of collecting container , check fliters)

excessive powder in cyclone colleacting container ( transfer pump or dense phase conveyor does not operate or performance is too low )

check pump insert or pinch valve , check for impact fusion in pump , check for impact fustion in transfer powder hose ,check pressure , check times cycles

collection fliter static pressure too high ( cleaning does not operation effectively , fliters clogges ) check flter pressure , check cleaning pressure , check cleaning cycle

sieve clogged (mesh too small , sleve machine too small , poor maintenance , powder sintering ) contact supplier , contact supplier , cleaning daily, contact powder manufacture