Rapid Arc Pulse?????

admin

hey everyone i am new to this forum and have been reading alot of the posts and everybody seems pretty helpful-i have some questions about rapid arc pulse welding-i am using a lincoln 455 on a fanuc rj120ib 10L robotic welding arm-.045 lincoln L-50 wire-now i can lay down fast and neat welds using .035 and soft/crisp pulse but i cannot get the rapid arc mode to produce the same quality-nor is it any faster??? any body have any setup tips or know something that i maybe overlooking? thanks for any help/advicethe putz
Reply:The Lincoln 455 Power Wave is a very sophisticated power supply allowing you to tweak many aspects of the actual pulse wave form (as you know).  I played with one for a short time, but mostly ran a Hobart/Thermal Arc, Arc Master 501 with a HMC-410 controller.  I was doing assembly line automotive component welds on small steel parts, around 2" diameter where the weld time was limited to about 8 seconds max.  Some of the welds had tight joints and difficult access so I purposely set the pulse for the minimum peak current time, and maximum peak current, can't recall now probably 1msec and 500 amps, to produce high frequency (probably 350 pps) constricted/stiff/ arc.  I also ran the tip to work distance about 1/2 to 5/8" and kept the voltage low around 24 V to keep a tight controllable arc.  The fine spatter you get at the tight arc voltage was less of a problem that the poor fusion in the tight joints I would get with the longer, hissing spray arc.The low frequency arc, which is a broader, softer, arc than the high frequency arc, just would not work well for me, particularly on narrow grooves.  And the low frequency arc was even worse as arc length is increased.I used 0.045 and 0.035, Lincoln E70S-3 and -6, with 92 Ar/8 CO2, push angle about 30 degrees from vertical.
Reply:hey pulser thanks alot for the info-i appreciate the help!!! and your right the power wave 455 is one complex unit-but in the same respect a very nice and useful machine-very broad list of things you can weld with that particular power source