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Plasma cutting table

Discussion in 'Laser Cutters' started by mytechno3d, Jun 9, 2016.

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  1. petere101

    petere101 New
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    THC stands for Torch Height Control. It's a method to optimise the height of the plasma arc above the work piece. In the extreme, it can be used to (for example) cut a piece of corrugated iron....
     
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  2. Redneck darrell

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    Ok that makes sense , now I just need to figure out how to wire the torch ( powermax 30 ) to the cnc.
     
  3. petere101

    petere101 New
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    OK, Plasma enthusiasts!
    What size machine do you have and what is your best result in (1) Aluminium, (2) Mild Steel, and, (3) Stainless Steel. Please provide images of cut and dross :) AND plasma machine info and cutting settings. This should be interesting!
     
  4. mytechno3d

    mytechno3d Journeyman
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    My best result is in Mild Steel 3 mm , speed 2500mm/mn , arc voltage 125V , torch height 1.2mm
    [​IMG] [​IMG]

    also good in mild steel 5mm at 1400mm/mn

    [​IMG]

    Plasma cutter in an Hypertherm PowerMax 45.

    I'm still searching good setup to cut aluminium .
     
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  5. mytechno3d

    mytechno3d Journeyman
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    this face has no treatment ( except it's painted ) , there were some dross on the other side , but really easy to clean.
     
  6. mytechno3d

    mytechno3d Journeyman
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    some of my works done with this cutting table
    op1.jpg op2.jpg op3.jpg op4.jpg op5.jpg
     
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  7. Svetko Buha

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    Ciao
    E 'possibile acquistare The laser Box ( laser 2.8W) già montate o di progetto per la sua preparazione per uso hobbisti.
    Buha
     
  8. mytechno3d

    mytechno3d Journeyman
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    Hello
    Yes it is possible , i will contact you on PM
     
  9. mytechno3d

    mytechno3d Journeyman
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    My CNC plasma cutting table is now working with a THC , it is a pretty nice addon , but really usefull only on big size cutting .
     
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  10. mytechno3d

    mytechno3d Journeyman
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    z floting head.jpg IMG_20170308_182605.jpg IMG_20170308_182551.jpg IMG_20170308_182524.jpg IMG_20170308_182538.jpg For those who asked me some pictures of the Floating Head
     
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  11. Mark Carew

    Mark Carew OpenBuilds Team
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  12. EfrainLenisMaturano

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    hi, can you send the wiring diagram please? thanls
     
  13. mytechno3d

    mytechno3d Journeyman
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    Hello
    For which part do you need the wiring diagram ?
    For all the movements, it is identical to the OX CNC , for the wiring of theTHC , you can find the wiring on this thread some post before .
     
  14. EfrainLenisMaturano

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    Ok thank you
     
  15. trivalb

    trivalb New
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    Hi, I already have an OX derived router diy.. I'm wondering. Are delrin wheel ok for a plasma cutter? No troubles whith high temperature of iron small pieces from the spot ? Sorry for the poor english.
     
  16. mytechno3d

    mytechno3d Journeyman
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    Hello
    I use delrin v wheels from around a year , and i have no problem with them.
    They are pretty resistant .. :)
     
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  17. JustinTime

    JustinTime Journeyman
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    A few days ago on another thread someone mentioned that he had problem with the delrin wheels. They got a flat spot when he left his machine idle overnight. I think his gantry was a bit heavy, which makes it more prone to getting a flat spot.
     
  18. mytechno3d

    mytechno3d Journeyman
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    it can happed when your eccentric spacer is over tight
     
  19. Redneck darrell

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    What program do you use to do the cutting with? All I can find in open source is laser programs nothing with a lead in or lead out.
     
  20. mytechno3d

    mytechno3d Journeyman
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    I do not use an opensource program with this machine .
    I use sheetcam to generate my gcode file , and you can use grbl software to control it like a cnc ( with a torch instead router )
     
  21. Tinkerman92

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    @mytechno3d I'm thinking about doing a build very similar to this minus the water table for now.

    I have 3 questions

    1. Do you feel the 20x80 rails are necessary without a water table or could 20x40 rails be used instead

    2. What size belt and pull are you using

    3. What size motors
     
  22. Redneck darrell

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    I just tried sheet cam out well worth buying just one question im using ardunio grbl what post processor do you use
     
  23. mytechno3d

    mytechno3d Journeyman
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    **************
    Hello
    Sorry to answer you only now , to much work to do and not enough time ...
    1 / because au the size of the machine i prefer using 20x80 instead 20x40 rails , plasma cutting go really fast , and you must have the maximum rigidity .
    2 / I'm using GT3 belt and GT3 pulley ( same as ox CNC )
    3 / I use nema 23 for x and y axis and nema 17 for 7 axis
     
  24. mytechno3d

    mytechno3d Journeyman
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    Hello
    I 'm using a mach3 compatible card now , but when i was using GRBL , from memory i also use mach3 post processor , but as i said , it is from memory ..
     
  25. mytechno3d

    mytechno3d Journeyman
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    It's been 2 years now that I use this machine , no problem at all :) .
    My only advice is not to invest in THC for this size on cutting table ( on only use 3 or 4 times in 2 years )
     
  26. John Mayer

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    Can you please provide the BOM?
     
  27. mytechno3d

    mytechno3d Journeyman
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    Hello , i will try to post the BOM tomorrow afternoon
     
  28. mytechno3d

    mytechno3d Journeyman
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    BOM is now published , some parts are missing but will be added really soon .
     
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  29. John Mayer

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    Thanks! Looking forward the completed version!
     
  30. toomanyquail

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    I would also love to see the completed BOM. This machine looks great. What is the fastest feed rate you feel comfortable with on the machine (not worrying about plate thickness)? Thanks!!
     

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