Plasma cutter circle and radius cutting tool. (Video)

  1. Tilly819 Member

    Messages:
    81
    Location:
    East Midlands - UK
    Hi all,

    I'v been feeling the need to cut some circles out with my plasma cutter recently. Straight lines are just getting a bit boring. You know how it is. So i'v made a little circle and radius cutting guide. Hope you enjoy the video.
    Cheers,
    Rob

     
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  2. My Old Landy

    My Old Landy Member

    Messages:
    131
    Location:
    Buckinghamshire UK
    That is a great idea. I have watched a few of your videos and they have been very good!
     
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  3. Craig-SM

    Craig-SM Member

    Messages:
    910
    Location:
    Leeds
    Rob, I like that a lot. If you fancy making another,I have the same plasma cutter, let me know how much
     
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  4. RonA

    RonA specialist in repairing sealed for life equipment

    Messages:
    1,583
    Location:
    Stockton on Tees, UK
    A timely posting, need to cut some circles myself. Will have a go at making something similar.
    Sometimes need to cut irregular shapes for bodywork panels. Freehand cutting is a bit iffy due to hand shake, anybody any suggestions for a more guided cut?
    RonA
     
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  5. daleyd

    daleyd Member

    Messages:
    6,909
    Location:
    Wrexham, North Wales
    A pantograph? Not sure how that would work with a plasma torch and trailing cable as it might be quite heavy. :dontknow:
     
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  6. fizzy Member

    Messages:
    6,428
    uk
    First class YouTube video!
    What RPM were you turning it and what inserts/lathe tool? I struggle to get a good surface finish with carbide as my old Triumph lathe will only spin up to 1000RPM.
     
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  7. Craig-SM

    Craig-SM Member

    Messages:
    910
    Location:
    Leeds
    I’ve been using a hose pipe held in place with sticky pads. I prefer this tool though
     
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  8. RonA

    RonA specialist in repairing sealed for life equipment

    Messages:
    1,583
    Location:
    Stockton on Tees, UK
    That’s got me thinking, could cut a wooden shape on the bandsaw as the pattern
    RonA
     
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  9. daleyd

    daleyd Member

    Messages:
    6,909
    Location:
    Wrexham, North Wales
    Something like this....??

     
  10. RonA

    RonA specialist in repairing sealed for life equipment

    Messages:
    1,583
    Location:
    Stockton on Tees, UK
    Brilliant. job done
    RonA
     
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  11. gordon stephenson

    gordon stephenson Forum Supporter

    Messages:
    6,880
    Location:
    Skelton in Cleveland U.K.
    Not video i'm afraid, I made this one in 2011 when I bought the Hypertherm 45, Its been used very many times and works perfectly, Can be centred into a centre "pop" dimple or use the attached magnet.
    Do a search on the forum for, circle cutter guide,

    P.s, I have forgotten how to post a link to the circle cutter guide,:doh:
     
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  12. slim_boy_fat

    slim_boy_fat Forum Supporter

    @Tilly819 Great idea! If you fancy making two [ref @Craig-SM ] I'd be up for one too.
     
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  13. gordon stephenson

    gordon stephenson Forum Supporter

    Messages:
    6,880
    Location:
    Skelton in Cleveland U.K.
  14. rtcosic

    rtcosic Member

    Excellent!

    Now to combine a circle cutting guide, a variable ratio pantograph and an electromagnetic clamp.



    I think I might like a grommet and an earth connection.
     
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  15. Tilly819 Member

    Messages:
    81
    Location:
    East Midlands - UK
    Thank you all for your support. I'm glad you are enjoying the videos and getting something out of them.

    Regarding requests to make more. I'm tempted but I doubt I could compete cost wise with the off the shelf units that are mass produced. I do have an idea for a new workshop related product that i'm hoping to show on the channel at some point. I need to make a prototype first though. As far as i'm aware there isn't really anything like it on the market. Super secret at the moment though.

    I don't know exactly as the read out on my lathe is faulty but i'd estimate about 1800 -2000 rpm. Insert is a TNMG. I like them as you get 6 corners. Downside is the holders are a bit more expensive. I think I might have a go at making some holders for them for the tool shapes i don't have. A carbide 45 deg tool would be really handy. I'll have to made a RH and a LH though as the insert is not square. Does mean I can use the bit in between the corners though to get more life out of the inserts. I really like the idea of being able to just have one insert that does 95% of jobs. Don't have to have a box full of expensive inserts then. Carbide really comes good at higher surface speeds. The problem is easy to solve with large dia parts as you don't need huge rpm's to get the surface speed It's the small parts that are the big problem. If i'm working at dia 5 -10mm the machine is almost flat out (2800-3000RPM) Sorry went off on a bit of a tangent there. Oops. Thanks for the support.
     
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