Any Advice on CP350 Aluminum Mig Set Up?

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I'm building a large out door pergola using 4"x8" x 1/4" wall aluminum rectangular tube. I tig welded the prefab beams but for the sake of time I rented a MM 350P with a XR-A push pull gun for site installation. I'm running 5653, .035 wire, Argon at 20cfm. The machine settings are gun = XR-A......wire = alm 5.. 0.35........process = mig......volts =21.......wfs = 700, (these settings have produced the best results so far. To produce a decent bead, I have to maintain a very fast travel speed, other wise the bead piles up with poor wetting and lots of smut. I attempted to set up the machine in pulse mig mode with no success. I'm welding in flat, vertical, and overhead positions, beveled but joints and T joints. Can anyone offer experienced advice on the proper set up of the 350P for my process? Thanks!Miller TrailBlazer 251Miller HF-250-1Miller MaxStar 150 STLHyperTherm PowerMax 380 plasmaLincoln PowerMig 180Millermatic 252Miller Diversion 180
Reply:Originally Posted by waginI'm building a large out door pergola using 4"x8" x 1/4" wall aluminum rectangular tube. I tig welded the prefab beams but for the sake of time I rented a MM 350P with a XR-A push pull gun for site installation. I'm running 5653, .035 wire, Argon at 20cfm. The machine settings are gun = XR-A......wire = alm 5.. 0.35........process = mig......volts =21.......wfs = 700, (these settings have produced the best results so far. To produce a decent bead, I have to maintain a very fast travel speed, other wise the bead piles up with poor wetting and lots of smut. I attempted to set up the machine in pulse mig mode with no success. I'm welding in flat, vertical, and overhead positions, beveled but joints and T joints. Can anyone offer experienced advice on the proper set up of the 350P for my process? Thanks!
Reply:You work get lots of Smut because of 5356 wire and I believe it's the magnesium in it that does it.  You are pushing the gun right?Tiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:Try increasing the voltage if you are getting poor wettingTiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:I did read the idiots guide chart but was an idiot as it does not list voltage settings, just wfs. After just now watching a few videos on the Miller site, apparently the machine will auto set the voltage to determined wfs. I think...Miller TrailBlazer 251Miller HF-250-1Miller MaxStar 150 STLHyperTherm PowerMax 380 plasmaLincoln PowerMig 180Millermatic 252Miller Diversion 180
Reply:Yes, I've tried pushing, pulling and 90 deg. push delivers the best results.Miller TrailBlazer 251Miller HF-250-1Miller MaxStar 150 STLHyperTherm PowerMax 380 plasmaLincoln PowerMig 180Millermatic 252Miller Diversion 180
Reply:I'm having to haul a** travel speed now to keep from push thru. If I increase voltage I could not move fast enough....Miller TrailBlazer 251Miller HF-250-1Miller MaxStar 150 STLHyperTherm PowerMax 380 plasmaLincoln PowerMig 180Millermatic 252Miller Diversion 180
Reply:Originally Posted by soutthpawTry increasing the voltage if you are getting poor wetting
Reply:Originally Posted by shovelonDid you read the setup chart in the compartment under the display? If you have had this much success, the idiot guide will dial you in for any pulse mode, however with that diameter wire I think it will be not needed.
Reply:Basically, I want to tune the 350P to a controllable travel speed that allows good puddle manipulation and wet in without the bead pile up, comparable to my MM252, migging steel.Miller TrailBlazer 251Miller HF-250-1Miller MaxStar 150 STLHyperTherm PowerMax 380 plasmaLincoln PowerMig 180Millermatic 252Miller Diversion 180
Reply:sounds about right for what your doing id add more argon i like to run 50cfh with a 5/8th nozzle and if you can switch to 047 wire. with that setup id be at 27.5 volts pushing 600 wire. And alu mig is fast you can do ft a min with alu instead of inch a min with steelHigh Octane Welding
Reply:Originally Posted by abecsounds about right for what your doing id add more argon i like to run 50cfh with a 5/8th nozzle and if you can switch to 047 wire. with that setup id be at 27.5 volts pushing 600 wire. And alu mig is fast you can do ft a min with alu instead of inch a min with steel