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  1. #21
    Made some test cuts today,


    I cut repeated test lines at various speeds and settled on the one that gave me seemingly acceptable results, this turned out to be 20A at 1275mm/min. I am trying to keep speed down as my machine is happier at lower speeds (this will be looked at later) hence the lowest power possible, 1.5mm steel again, pierce height 4mm, cut height lowered to 1.5mm.


    This setting gave me a 1mm kerf width, picture of my final test for the day below..
    Click image for larger version. 

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    One point I noticed was that I had plenty of dross on the good (job) side and almost none on the scrap (cutoff) side, does this indicate my cut direction is wrong???


    System is behaving itself though which is good.

  2. #22
    Great start. I bet you feel very pleased. Well done. G.

  3. #23
    Quote Originally Posted by Davek0974 View Post
    One point I noticed was that I had plenty of dross on the good (job) side and almost none on the scrap (cutoff) side, does this indicate my cut direction is wrong???
    I don't quite see how, but wouldn't a better electrical connection be a more likely explanation?

  4. #24
    From what I've read so far, it's a bit like milling, the jet prefers to cut one way rather than the other, I'm trying to find the post again because I can't remember if it was clockwise around the outside or anti clockwise, easy to test though.


    its connected with the way the plasma swirls as it exits the nozzle.


    once the first part of the cut passes a bed slat, it's pretty much tack welded down so the contact should be good.

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