losing roundnes very fast, hypertherm plasma

[stigsolbjerg]

hi there. dont know where to start,my plasma wont cut a usable hole!! cutting 10 mm-3/8 mild steal, holes 15mm-9/16, 4 holes in a square plate 300x300mm-14"x14". first one ok but after 5 it is very bad specialy on the holes, the edges are ok. The spray of molten metal when i pierce always go in the same direction, and build a smal slagg on the top of the plate. the bad holes go to the same side. i have the torch angeld against it to cut straigt at the start, but after the5 pieces it aint straight any more, cutting whit plasmacam and a hypertherm powermax 105 set at 85 amps and 85 amp consumables mounted. do you have the same issues?

[stigsolbjerg]

Hmm have a new question today, am i mowing my z-axis too fast it is set at 10m pr min, i have a powermax 105 where schould i set the the operator button in top or no 2?

[jimcolt]

Send an email request to me and I will send you a presentation called "Best Practices for Hole Cutting". This will help you get dialed in better. Good quality holes are a function of: choice of consumables and power level, speed, lead in style and location, pierce height, pierce delay, cut height, condition of consumables, ability of your machine to maintain steady state cut speed. Jim Colt Hypertherm jim.colt@hypertherm.com