No, please do not get me wrong, on the tip issue companies like Cloos & Fronius are not falsley ripping the customer off anymore than the other major players.
In general today the major players try hard to have a high level of buisness ethic - of this there is no question.
The rip off...
I like you am in the industry and infact I have worked for several of the companies listed and have been involved with the manufacture and supply of tips for both - you will find Cloos and Fronius still manufacture their own tips in Germany and Austria respectively.
Most other companies get...
You obviously ignorant of the welding supply industry, with wire and tips it is so competative they have to look at any commercial edge or factor to make more profit.
Of course there are a few applications where an alloyed tip will give a longer tip hole life is beneficial - such as using...
Some water cooling units use basic central heating water pumps, so you can
compare how competative you are against these.
There is a very small market for water chilling units on some heavy duty automated welding systems for companies like Caterpillar.
I have been in welding for almost 50 years, was an apprentice trained welder/boiler maker qualified in most every process, have built and developed welding machines, lectured in welding at college, worked for the welding industry all over the world and for the last 20 years as a welding engineer...
In the case of some companies the reason for tapered and non tapered tips is if you using a large or small dia gas nozzle, the tapered tip for the small nozzle so that you have more gas & spatter space around it.
For interest, the best welding tips are pure copper, not alloyed copper, this was...
With the Aluminium it is correct and much better to use the Pulse transfer mode.
Using an Argon helium mixture will increase the arc energy & heat input and theoretically allow you to reduce the wire feed and therefore reduce the weld size while maintaining the fusion & penetration.
This...
I have always found this differs between welders, according to the book it should depend on the amperage used but I always liked a lower shade No. than reccommended otherwise I could hardly see anything.
Best to try what suits you, if its too dark you won't see enough, if its too light you will...
A/C Tig is definately the way to go with this, especially with the material thickness you are probably working with.
Depending on what you want from the weld you can use either an Al 5% Silicon wire for the smoothest looking weld or an Al 5% magnesium wire for best mechanical strength - if in...
The relevant question is what joint are you trying to weld?
If for instance it is a Square butt, no gap then a 300 amp machine will struggle to fully penetrate.
Don't think you need to worry about non return valves as the outlet pressures involved are not enough to backfeed against the cylinder pressures.
The trick is how to mix the 2 gases without buying a proper mixer unit.
If you don't get them mixed reasonably well you will get some...
It is very unlikely to be anything to do with the burn back.
One check for gas problems is to grind the nipple and see if there is a cavity under it, if so then you need to check your gas line and flow.
On the basis it suddenly started you would be looking for something you changed and for...
I think they started to make this range in the 70's for the lower end market - small workshops and garages using 0.6 to 1.0 mm wires.
They were good basic machines easy to use and reasonable to work on if you had a problem.
The old rule of thumb on gas flow rates relative to wire size was 10 x wire dia
ie 10 x 0.8mm = 8 Litres/min, with 1.2mm you would use 12 litres/min. This holds pretty true but in practice you tended a add a couple on for a bit of safety.
In reality it really depends on several things but...
For interest, non inverter power sources capable of MIG, TIG and Electrode welding have been available for more than 10 years, infact they are also capable of arc air gouging. The ability to change the characteristic curve has been the electronic capability of the machines, not the transformer...
You need to be careful in using pure argon for welding steel, for any real construction work this would not be acceptable as the side wall and root penetration pattern is very low giving an understrength weld.
An Agon CO2 mix is the correct choice for steel and you will find that a 95/5 mix...
You can not use CO2 as the shielding gas for MIG Brazing, the result will be a disaster, as the process states it is a Metal Inert Gas process and to get any sort of result you must use straight Argon.
Brazing filler material will not tolerate being oxidized.
You can weld aluminium with a DC arc. In the early days Aluminium was done this way.
The point is that the electrode has to be DC Positive - not negative as for steel etc.
It is the DC Positive wave form that breaks up the oxide on the weld pool surface - when you weld with an AC arc it is...