If yours has the switch option the way you throw it over is to hold on to
> the trigger while turning on the machine. Do it again and the machine goes
> back to regular start.
> Randy
>
> its a 255 lincoln mig welder, it was already set up for mig welding aluminum
> not sure if it has a teflon liner? went to the lincoln site and they have
> Selectable slow or fast wire feed run-in for smooth arc starting, the
> machine is a few years old so i am not sure if it has this feature, or where
> the switch is, if it does, they show a timer set on the machine which smeems
> to contol this feature, Never seen a speedometer? but they have tackometer
> on a mig welder A welder uses thier ears to listen! its a very simple
> instrument :) you can the pitch of the drive, it makes a distinctive sound,
> also i pulled on the wire with a pair of needle nose made no difference,
> also played with the tension on the wire spool and the pressure on the drive
> wheels, thiers not alot of welding with the mig its mostly used for tacking
> and small welds an 1" or 2", most of the welding is tig, it just annoying
> when you do have to make a weld, it works fine once it picks up speed and
> keeping the hose fairly stright, the ideal would be to have cobra push pull
> gun, they have a spool gun on a canox but it does not run like it should
> its old and fussy to set up, if i time tommrow i will poke it with a stick:)
>
> > > >
> > > When you snip your wire each time pull the wire a bit before snipping
> > >off. that takes up the slack so to speak and give the wire a run at it > when
> > >starting. Seems to help for me even on push pulls I have used. > > >
> > >"Q"uestion that is, I'm using a lincoln 175? not positive, .045 4043 > wire,
> > >it does not have PPgun, the question being that every time the trigger is
> > >squeezed, the wire comes out slowly, than it speeds up after a few > seconds,
> > >when it does this its running too cold, is this normal ? i've played with
> > >the wire speed and still the same :)
> > >
> > >--
> > >RODNEY JOHNSON
> >
> > How do you know the wire speed is starting slow and speeding up? Do
> > you have some kind of speedometer on the wire or measuring reel rpm? > >
> > Aluminum is great heat conductor and it is normal to have cold starts
> > more so with small welders. Then they are running a little hot as
> > aluminum heats up. That is one reason for run on plates. Preheat helps
> > prevents cold starts and drys the aluminum so it welds better. Always
> > SS wire brush aluminum weld joint and 1/4" on each side to remove any
> > oxide that requires higher heat to puddle and can hides enough water
> > to cause porosity.
> > Some Kemppi MIG welders have wire speed control on gun to help adjust
> > feed speed (heat) while welding .
> >
> > Small MIG welders don't have preflow. No Argon to ionize requires
> > higer voltage to arc and shielding problems. Aluminum is more
> > sensitive to poor shielding than mild steel.
> > Feed a little wire without welding just before welding to get
> > shielding gas to mig gun . Then quickly pull on wire end and clip
> > flush to nozzle. This gives a little time before arc starts and a
> > little shielding gas preflow.
> > Use a flowmeter that requres higher regulator pressure will give
> > slightly more flow surge when welder's gas solenoid opens which might
> > help. You can hear this flow surge but it doesn't show on flowmeter as
> > it is using excess pressure in hose. Some flowmeters require 35 psi
> > supply others require as high as 50 psi.
> >
> >
> >
> >
>
>
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>