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A Cheap Compact Linear Slide

<$10. <10μm repeatable. >10kg capacity. Laser-cut 1/8" hardboard. For 100mm x 6mm rod, but semi-parametric. Handwheel or stepper drive. CAD.

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This very low cost linear slide design does most of the work of my “Minamil” project - a “minimal CNC mill”. I hope this rendition of a single isolated unit will serve two purposes:

• Share this idea as a concrete, ready-to-use example

• Isolate and simplify the hard part of describing how to make a Minamil-like machine

This very low cost linear slide design does most of the work of my #Minamil project - a “minimal CNC mill”. I hope this rendition of a single isolated unit will serve two purposes:

  • Share this idea as a concrete, ready-to-use example
  • Isolate and simplify the hard part of describing how to make a Minamil-like machine

Maybe you can use this to reduce the entry cost of some other project!

Video showing load carrying capacity and repeatability (>10 kg, <10 μm):


If you want to try one of these (or three) for yourself, check out detailed build instructions over at Instructables.


The CAD model is configurable for:

  • material thickness
  • handwheel or stepper drive
  • driving/driven side

A couple of example configurations:

handwheel drive • heavy load configuration

stepper motor drive • fixed point-of-action configuration

The moving load/fixed PoI distinction illustrated:


Where this comes from, and is trying to get back to:

#Minamil: a minimal CNC mill. And friends. 



But HaD.io projects can include instructions...

Why send traffic elsewhere instead of writing instructions here in sunny HaD? Because the longish 'ible was a mess until it was done and I didn't find how to save unpublished instructions-in-progress here.

  • Build instructions that I don't already plan to re-do. !.

    Paul McClay04/23/2021 at 07:34 0 comments

    Ok, I've managed to finish re-writing an Instructable without already having the next necessary re-write in mind. Yay!

    Instructable
    Build yer own! Lemme know how it goes!

    The last couple of logs included:

     [Update: but the 'ible is the Better Way. (...and I've thought of a futher simplification, I think...)]

    then:

    Coming soon: another rev for easier ease of assembly, and [...]

    I rilly wanted to get this done. But writing isn't my thing and this slowed me down for a good long time. Now maybe back to actually doing stuff...

  • Stackable

    Paul McClay04/12/2021 at 20:42 0 comments

    Slides stack easily for 2d.

    Manual slide on top at full extension holds mass cantilevered far off the side of a powered slide. Bottom slide doesn't care.


    Coming soon: ̶a̶n̶o̶t̶h̶e̶r̶ ̶r̶e̶v̶ ̶f̶o̶r̶ ̶e̶a̶s̶i̶e̶r̶ ̶e̶a̶s̶e̶ ̶o̶f̶ ̶a̶s̶s̶e̶m̶b̶l̶y̶(done), and a refresh of #Minamil: a minimal CNC mill.

  • Stepping out: power slide

    Paul McClay03/19/2021 at 03:30 0 comments

    (update:   ̶̶G̶o̶o̶g̶l̶e̶ ̶d̶o̶c̶ ̶ -> less ponderous 'ible)

    The ur-example:


    Handwheel drive was a recent-ish simplification of a generalization of the slide mechanism used in #Minamil: a minimal CNC mill. After talking about but not posting sufficient info to make that reproducible for [some number of] months, I started this project when I had enough [i.e. too much] written about building a slide with handwheel drive, leaving stepper drive as a to-do.


    The point: now the ̶d̶i̶y̶ ̶d̶o̶c̶ ̶ includes stepper drive. [Update: but the 'ible is the Better Way. (...and I've thought of a futher simplification, I think...)]  


    motor needs tweaks

    paperclip needs tweaks

    backlash adjuster (#Minamil demonstrates usefully small backlash)

    You could probably figure out much of that yourself, but expecting anyone to pull the spring out of thin air seemed unreasonable.


    Yay (for me -- I struggle with the writing-up part of any project -- on the rare occasion that I  actually undertake to do so) for a milestone.

  • Impending simplification

    Paul McClay03/19/2021 at 02:04 0 comments

    While writing up "details" for this project and its "silly long" instructions doc, I added:

    ...I've just thought of an easier-to-describe assembly sequence that might work. It might cost some flexibility for post-assembly tinkering, but maybe that's a good trade for nearly everyone.

    And then I went and tried that. Fail. But failing lead to another idea that worked. So hopefully the "Assembly" doc will get thinner "soon".

    (removed that bit from the "details")

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Ahron Wayne wrote 04/17/2021 at 08:09 point

the world can always use more linear motion! nice and smooth and strong!

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