Wonder if anyone has an idea of what gas post flow time should be for
air-cooled torch set up, being used with a 200amp inverter, mainly on
aluminuim?
TIA
Rob
- posted
17 years ago
Gas post flow aircooled TIG torch?
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- posted
17 years ago
As long as it takes to protect your weld puddle from being contaminated by
the atmosphere. Post flow is to protect your weld not cool the torch. Good
luck
- posted
17 years ago
Just downloaded very good Miller tech guide to TIG, and according to that,
post flow gas needs to set at 1 sec, per 10amps of welding current, to
prevent electrode oxidation (exactly the problem I am having).
- posted
17 years ago
Post flow is mainly to protect your tungsten.
Protecting the weld puddle is secondary and only useful on Stainless
steel.
I tend towards 15 to 18 seconds. The test is if you tungsten stays silver. If it turns purple then you need more post flow gas.
I tend towards 15 to 18 seconds. The test is if you tungsten stays silver. If it turns purple then you need more post flow gas.
- posted
17 years ago
contaminated by
Thats exactly the problem I was having Ernie............will reset post flow
later today, and hopefully tungsten oxidation will go away.
Rob
Rob