MPCNC next level (4th axis)

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This topic contains 15 replies, has 5 voices, and was last updated by  Jeffeb3 7 months, 1 week ago.

Viewing 16 posts - 1 through 16 (of 16 total)
  • Author
    Posts
  • #53166

    CharlieBravo
    Participant

    Hello,

    has anyone took it to the next level and added a 4th axis to mpcnc?

    I am one of them, cant leave stuff alone kinda guys.

    CB

    #53169

    Steve
    Participant
    #53171

    CharlieBravo
    Participant

    nice, what firmware are you running for that one?

    I have printed that centering chuck for a friend, they are abusers when they know you can make stuff. =P

    #53180

    Jeffeb3
    Participant

    Leo69 (V1 Hall of Flame member, for sure) made one, and a few others followed right away. It wasn’t as much a 4th axis as a rotational axis instead of the Y. You can connect the y axis to the rotational motor, then you need to make sure the machine moves right down the axis and your steps/mm are right for the radius of material you are working on. Then you can do things like carve into bats or something.

    #53181

    CharlieBravo
    Participant

    So you would give up the y movement to it?  or would it be extra axis?

     

    #53184

    Jeffeb3
    Participant

    He gave up the Y.

    #53188

    CharlieBravo
    Participant

    I watched another machine that had it off the main bed and had what looked like a lathe for a 4th.  it looked crazy!

    I am going to mod my mpcnc to increase some stuff.  I ended up wanting to big of a work area and to tall to be able to clear different things.

     

    #53189

    Ryan
    Keymaster

    It is much better to make a drop table than a tall machine. Usually it serves the same function. Tall machines are not very fun.

    1 user thanked author for this post.
    #53190

    CharlieBravo
    Participant

    i made one for the current machine. it service the function of also leveling =P  !!

    #53200

    CharlieBravo
    Participant

    I miss that drop table part or took it for something else.  Are you talking about when it goes vertical or when the table is able to move up and down?

    #53205

    Ryan
    Keymaster

    Rough example. You build a standard MPCNC with a 3.5″ Z reach, but you want to carve the top face of a 3′ log, you build a table that has a bed that can be adjusted down to accommodate. Not trying to make a powered bed, if that makes it more clear.

    #53219

    Steve
    Participant

    Then you can do things like carve into bats or something.

    I want to try milling a Star Wars E11 blaster tube in ABS, then change to a print head and try printing some parts on it.

    Attachments:
    #53231

    Jeffeb3
    Participant

    Cool! That could definitely be done without a Y axis. Your drawing would just be the unrolled surface of the tube. The rotation would be set up so that 1mm of travel in Y would be 1mm on the surface of the tube.

    1 user thanked author for this post.
    #53235

    CharlieBravo
    Participant

    ok, i was tracking that way to drop the bed down but just wanted to make sure.  that gun looks pretty damn good.

    #53290

    Jose Lapao
    Participant

    Hello, Jeffeb3, can you please tell where i can find a tool that give me the right step/mm for the radius, and if I want to engrave with a diamant tool a glass of GIN that have a lot of diferent radius is the big one? I have mod all ready my mpCNC for now is a milldown machine, a 3D printer and a laser cutter/engraver, and i what use a lathe to do more stuff, if you can show me a tool to calculate the step/mm for radius i apprecheate

    #53291

    Jeffeb3
    Participant

    I don’t know of any tools for that. You won’t only have to adjust the steps/mm, you also have to raise the Z to match the radius.

    I have seen Ryan cut a vinyl sticker and used glass etching to etch a pint glass.

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