Need help - Just Bought a Kemppi KEMPAK Super 150 DC TIG Qs !!

[Paul G]

I once used a small Tig welder made by Eutectic that had a lift start system.
You touched the tungsten and then operated the torch switch and a tiny current flowed.
When you lifted off and broke the circuit the welding current ramped in.
Lift your finger off the switch and the welding current stopped.

I've always thought that scratch start was a term used when low price stick inverters are
fitted with a tig torch with no switch, just a valve to turn the gas on.

I could be wrong (and frequently am. )

Cheers,
Paul G

 

[pedrobedro]

I once used a small Tig welder made by Eutectic that had a lift start system.
You touched the tungsten and then operated the torch switch and a tiny current flowed.
When you lifted off and broke the circuit the welding current ramped in.
Lift your finger off the switch and the welding current stopped.

I've always thought that scratch start was a term used when low price stick inverters are
fitted with a tig torch with no switch, just a valve to turn the gas on.

I could be wrong (and frequently am. )

Cheers,
Paul G

My Stel offers scratch, lift or HF start. The lift arc works as you say but in 2T or 4T and is for use in areas where the HF may interfere with sensitive electronic equipment according to the manual.

 

[Ragnarok]

i've heard that HF tig can fry the computers in cars, i think it may have been only if the earth clamp isn't properly connected? anyway, i did see something about only using lift start when welding cars with computers..

 

[KemppiFrog]

It also was said that welding on cars would fry the alternators diodes, if not disconnected. But I have yet to meet someone that it happen to.
Makes more sense about HF and CPUs.

 

[Ragnarok]

yeah i always unplug my alternator and battery before doing any welding, there is an aluminium stamped plate an both of my land rovers that say to do this before arc welding, so don't want to risk leaving them plugged in haha, but the HF thing is like in addition to that risk apparently, i think it's because it'll jump gaps better, and i guess through any damaged insulation? or from the body of an ecu do a pcb?