How To Build A Travel Slider That Slides Twice Its Size

A short while back we (as the rest of the world) were pretty amazed by the innovation from the folks over at Edelkrone with their Slider+, a 1 foot slider that can slide 2 feet.

How To Build A Travel Slider That Slides Twice Its Size

Now videographer Doc Hutch shares his build for this slider. The secret sauce is actually combining two sliders and threading them with a wire that transfers movement from one slider to the other.

How To Build A Travel Slider That Slides Twice Its Size

Doc uses linear sliders bought in a neighborhood store, but you can use any two identical sliders.

Here is Doc Hutch’s inspiration for you (film)makers: “This is follow up to my other DIY Edelkrone Style Slider video. I do not know the name or brand of the material and the hardware store I bought it from closed down. Take what you see and use your imagination and I am sure you will all figure out something that works

the idea behind this slider is very similar to a design principle used by cargo lifters, known as block and tackle. Block and tackle is a system that exchanges movement for force. Here are a few examples from wikipedia, showing that in theory you could build a 3:1 slider (i.e. a 1 foot slider that extends to 3 feet)

How To Build A Travel Slider That Slides Twice Its Size

Only in the slider above, there is not much force applied and the movement is simply doubled.

If you wanna make such a slider, here is the entire tutorial by Doc.

and the demo reel

[DIY Edelkrone Style Slider (Tutorial) via ISO 1200]

  • Doc Hutch

    Alright guys I have tracked down the company that sells these types of linear slides.
    http://www.lm76.com/speed_rail_osg.htm
    Use the OSG25 and remove the oil wipers or you will have a mess.

    Let me know if you guys would like for me to take the slider apart and put it together step by step on another video. Leave a comment on my vimeo if you guys would be interested.

    • http://www.diyphotography.net/ udi tirosh

      that would be pretty awesome, Doc! let me head over to the vimeo and say so there too :)

    • dmxsir

      Do you know the price for them?

      • Rick
        • thebeline

          Yeah, I just spoke with the LM guys:

          2 Blocks @ $66 each
          2 20″ Rails @ $54 each
          freight @ $8 (to Maine)

          Total of $248.

          A little more length… But… Ugh… I want to make one so bad. :-D

          Also, it occurs to me that he may be messing with me in regards to length. 20″ is only 4mm longer than 500mm, which A4L sells for $45.

    • Jayson Carey

      You can also get a ton of different styles of slider blocks and materials from Mcmaster.com

  • HTSP

    hi there…just a quick question…can you also use the slider for a slide of an angle of 45° upwards or downwards? (not straight slides)will it work?

  • Mark Berry

    Umm, using block and tackle principles, HOW could you build a one foot slider that extends three feet? The best you can do is have the head travel the length of the track while the track itself travels it’s own length (i.e. twice the distance). If you achieved more, it’d fall off the end because you’ve only got a total of 2 foot of track

    To get more, you’d have to stack tracks, so a head travelling the length of a track, which is travelling its own length on a dolly which is ALSO travelling the length of another track below, etc. But that is NOT using anything more than the doubling block and tackle principal (twice).

    • http://www.diyphotography.net/ udi tirosh

      yea, you are 100% correct, a 3:1 ratio slider would need three moving plates. it would be uber-cool wouldn’t it?

      • Mark Berry

        I’m thinking 10 sliders! Why stop when you’re ahead!

        • http://www.diyphotography.net/ udi tirosh

          :)

  • Brian McCarthy

    What happened to the links on this? Looks like Doc Hutch’s vimeo account has vanished.