Clogged contact tip with shavings.

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Hi, Im using a alumapro with a deltaweld451 and i using 1/16th wire with the correct 1/16th tip (its about 1 mm bigger than the standard 1/16th tip). My problem is that im getting aluminum shavings right where the teflon liner in the gun meets up with the back of the contact tip. And the shavings are binding up the wire so it cant be fed through which causes it to burn back. my liners are clean and my drive rolls seem to be set right. but i can only seem to weld anywhere between 10"- 2' before it gets clogged again. Does anybody have any ideas? Would really apreciate any feedback...thanks guys!
Reply:Use 1 size larger tip. As it heats up the wire expands and get stuck in the tip.Torchmate 2x2 CNC with Flashcut CNC controlsHypertherm Powermax45 Esab ET220i Razorweld 195 MigRazorweld 200ac/dc TigTormach 770, Tormach xstechRazorweld, Vipercut/Vipermig, SSC Foot Pedal Dealer
Reply:Check tension on the spool first then condition and alignment of drive rolls.Miller xmt304,  Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.