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Tools/mig/induction: Difference between revisions
→Main level 2 induction
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=== Main level 2 induction ===
* Going into Manual mode on the welder and suitable settings to use
** How to select manual mode
** Selecting the proper material in use on the menu
** Adjusting wire feed rate and voltage
** You don't set current, that's controlled by the interaction of voltage and wire feed rate
* Other welding modes - Globular and Spray transfer and the requirements for them
** Describe conventional (dip) transfer, globular transfer and spray transfer
** Globular transfer is normally undesirable as it's hard to control but it can achieve a deep penetration at the cost of severe splatter and difficult control
** Globular has a weird sound, a quiet hiss that's broken by a sharp crack a couple of times per second
** Spray transfer is a very high powered welding technique used for deeply penetrated welds on thick material
** The EMP235ic can just barely achieve spray transfer when loaded with 0.6mm wire and with a low-CO2 argon blend gas
** Spray transfer is very quiet in use, just a quiet whisper. It also produces a LOT of UV light so you'll need a darker shade than normal
** Both globular and spray transfer modes are only suitable for use on horizontal welds, they cannot be used vertically or overhead
* Problems
** Set up and demonstrate each of these
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* Working with thin (1mm) and thick (5mm) materials
* Lap joints of dissimilar thickness and dealing with burn-back issues
* Using tip-dip
** The dip is to keep the tip clean, it tends to prevent spatter from sticking to the nozzle
** The dip is waxy and has to be applied while the tip is hot so you do a bit of welding first, then dunk the tip into the dip and shake off excess
** Only a thin coating is needed and you don't have to reapply too often, every 10-20 minutes of arc time is fine
** Spatter can just be rubbed off with a gloves finger as the spatter will not stick
* Using anti-spatter spray
** The spray is to protect your work if it needs to be very clean and you can't easily clean it other ways
** The spray is applied to the work before you start and prevents the spatter from sticking to it.
** You can weld through the sprayed on coating so long as you don't apply it too heavily
** But if your welds are structural or otherwise sensitive to contamination, don't use it
* Welding hardening steels
* Welding mild steel in position 3
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