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SB Plotter

Discussion in 'DrawBot' started by Steven Busch, Aug 11, 2019.

  1. Steven Busch

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  2. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

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    Hello @Steven Busch great looking Build so far brother!
    One thing to consider would be possibility actuators for the X axis running in sync, like we do here for the ACRO it would allow you to remove the bracing for the single sides axis there now.
    If you wanting to stay this way you could make it a little stronger by adding a couple plates to sandwich the V-Slot in place.
    Hope this helps, looking forward to seeing the first drawings.
    Capture.JPG
     
    Peter Van Der Walt likes this.
  3. Steven Busch

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    Thanks Mark,

    I avoided the bottom X rail/carriage in order to make it easier to store this huge plotter when not in use. It will hopefully live on a wall in my classroom and move to the tables or floor when needed.

    I suppose if the Nema 23 motor isn't powerful enough to move the x carriage then I will need to double up and redesign the frame like the Acro. Hopefully I will be able to reuse the existing parts if this becomes necessary.

    I also had an idea to have a rack and pinion for the top X carriage, and wanted to make the Y assembly removable. If you have any thoughts on how to make that work or know where to source the rack/pinion gears affordably, please let me know.

    Cheers
    Steve
     
  4. David Bourne

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    .

    Steve,

    Although the acro utilises twin actuators, I do think that your design is capable of running with one motor. A Nema 23 is easily capable of operating this project. Potentially a high Nm Nema 17 is capable as well.

    Stay away from rack & pinion, this project does not need that type of motion, nor will it be as accurate as belt drive, especially over distance.

    Belt drive is more than capable of handling this project, even at the length you have here but you do need a belt that is not going to stretch such as a polyurethane type. You may also want to consider adding a reducer gear to each axis for better resolution, this if course depends on what you intend to draw with your kit.

    A change to the design which would be neat would be to allow the vertical axis to fold up 90 degrees to the same orientation as the left to right axis when not in use, minimising frame and storage.

    I have worked with cutter plotters for some time but not used the cutting / drawing mechanism on a large frame so would be interested to know where you are sourcing the plotter actuator and what controller you intend to use to initiate the actuator.


    Dave.
     
  5. Jeremy Worger

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    Hi, just wanted to chime in since I wanted to build something very similar (still do) but on the ground:

    Building the Acro 1515 with 1800mm extrusions

    I never got around to doing this, because I have no experience building something this large from scratch.
    I will follow your project in hopes of someday duplicating it if you figure it all out!
    By the way, there is also: Textile Drawing Machine
    Which could be converted and less expensive?
     
    #5 Jeremy Worger, Sep 14, 2019
    Last edited: Sep 14, 2019

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