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How to correct KNK Zing not making square cuts

My 45 degree blade was dull and so replaced it with a new 45 degree blade. The blade tip protrudes minimally beyond the opening of the blade holder and allows a test hand cut through a sheet of my 48lb paper. However rectangular cuts are not square. There is excellent tack on the cutting board plus I us a roller to press the sheet down and I tape down all four edges. The stock is 48lb, blade is set at 25 post-it height, speed is Cut: 11 Up: 11, Force is 65 and Multicut is 1, Blade offset is .45mm and am using the print-and-cut option. Also I have a fomecore surface level with the KNK Zing on each side so the cutting mat doesn’t sag going forward or reverse. I have two jpeg snapshots which show what is happening if that is any help. For the right angles the blade appears to veer up/left/right and then straighten. On others the edges are rounded.

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Answers

  • Crazy_Mr_ZingCrazy_Mr_Zing Member Posts: 3,378
    edited April 8
    A 45deg KNK blade would usually have a blade offset varying between 0.25 and 0.30mm

    offset can vary between batches

    Little tags at corners or rounded corners is a clear sign of incorrect blade offset

    This is explain in the user manual


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  • iQv7ul0Lbn9k0_z37iQv7ul0Lbn9k0_z37 Member Posts: 11
    I had adjusted before this by gradual steps from .25 to .30 to .35 etc and found that .45 solved the rounded corners and stayed square for what I'm guestimating was over a year. It seems if this KNK Zing I have (bought in 2016) gradually slips out of square.
  • SandyMcCSandyMcC Member Posts: 7,433
    I've never heard of a cutter slipping "out of square".  But given what you're seeing, decreasing the Blade Offset should solve the issue you're seeing with this particular blade. 

    Sandy McCauley
    Cutting with KNK Force, Maxx Air, Zing Orbit
    Need help with your KNK? Visit this link: http://knkusa.com/contact/
    Over 90 free MTC videos: http://www.iloveknk.com/support/mtc-support/
    Latest KNK / MTC User Manuals: http://www.iloveknk.com/Support/user-manuals/
  • MeFlickMeFlick Member Posts: 9,163
    I had adjusted before this by gradual steps from .25 to .30 to .35 etc and found that .45 solved the rounded corners and stayed square for what I'm guestimating was over a year. It seems if this KNK Zing I have (bought in 2016) gradually slips out of square.
    If I thought there was a physical problem with my cutter "slipping out of square," then I would reach out to KNK Support via their site by logging a support ticket for help. You can find that here: https://knkusa.com/support/  Only KNK support can best help you figure out a physical problem with your machine if there is one.

    Like Sandy (but not as experienced or as knowledgeable  ;) )  I too have never heard of a cutter that was physically "slipping out of square."
    Go Vols!
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    Cutting with 18" Silver Bullet and a KNK Force (the rest are collecting dust!)
  • iQv7ul0Lbn9k0_z37iQv7ul0Lbn9k0_z37 Member Posts: 11
    Thanks for the feedback I will try the support link. I'm also posting a jpeg of recent testing at .20, .25, .30, .35. The closest to square is .25 offset but in each test the corners are consistently rounded and not at a clean 90 degrees. The .20 test was taken out of the recycle so that is why it has a wrinkle.
  • SandyMcCSandyMcC Member Posts: 7,433
    When you do your support ticket, be sure to specify the material you're cutting and the other settings: pressure and cut speed. I know from experience what they ask. :)
    Sandy McCauley
    Cutting with KNK Force, Maxx Air, Zing Orbit
    Need help with your KNK? Visit this link: http://knkusa.com/contact/
    Over 90 free MTC videos: http://www.iloveknk.com/support/mtc-support/
    Latest KNK / MTC User Manuals: http://www.iloveknk.com/Support/user-manuals/
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