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What do I need to add a 4th axis (Rotary)

Discussion in 'General Talk' started by Droe0382, Jan 24, 2022.

  1. Droe0382

    Droe0382 New
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    Hello all,
    I currently have a Shapeoko xl and I want to add a 4th Axis one way or another even if that means using what I currently have and adding parts to achieve this. My current control board only has 3 axis output so I think its safe to assume I will need to upgrade that board but what else am I going to need other then that could someone please provide a list of everything I will be needing to be able to make this happen?any and all help will be greatly appreciated Thank You!
     
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Not quite, you can do rotary work with just 3 axes. Disconnect the X or Y (whichever direction you mounted your rotary) - connect the rotary to that driver, and then use Vectric's Wrapping feature to translate rotary to X or Y driver: Rotary Machining and Wrapping - VCarve Pro V9.0 User Manual (V10x guides are video only, excuse me linking an older version but it discusses it better)

    Practical example is Giarc's Lead Lathe running a BlackBox (Grbl = 3 axes) using Wrapping in Vectric: LEAD Lathe - se the discussions tab for example workpieces and setup details
     
  3. Giarc

    Giarc OpenBuilds Team
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    Technically, I use a post processor someone wrote for a grbl based rotary which translates mm to degrees. I further modified it so it outputs the file format I like. I can track that post processor down if you want. Although everything is designed as a rotary project so maybe the post processor does nothing but make it grbl friendly. All I do know for sure is it it works and that is all I care about. It was posted on here by someone that built a rotary CNC a few years ago, and then removed the build for some reason.

    So, workflow:

    1 Design in VCarve
    2 postprocess as grbl rotary
    3 run with whatever grbl based controller you have (after calibrating the steps per degree - 1 minute video on how below).
     
    #3 Giarc, Jan 24, 2022
    Last edited: Jan 24, 2022

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