crater

Sep 09, 2008 1 Replies

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mgk 18 years ago

can any give an idea to avoid the crater pipe SAW wheather we can increase the voltage and decrease the ipm at the end of welding.

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matthew maguire 18 years ago

If your sub-arcing with automated equipment you should have a crater fill/ tailout options on the power supply or feeder. Call the equipment builder or get your distributor to help.

If you're using a semi-auto hand torch (say at a 20-30degree pull angle) quickly rotate the torch to vertical, then pause for a 1 count and rotate the torch back slowly to a 45degree pull angle towards the weld and stop. Practice this and you'll get a small bump you won't have to clean up. Or use a run-in and run-off tabs and cut off after cooling.

Again, have your distributor get you help from the manufacturers cause the are some other issues involved with SAW, (Arc-blow, improper slope with the V/A curve, flux issues etc,etc...).

Matt

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