Toto's Traversers

Discussion in 'Workshop Benches' started by paul_l, May 6, 2017.

  1. paul_l

    paul_l Staff Member Administrator

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    5h57m - almost a quarter of the time to print.

    [​IMG]
    Difficult to see the detail but a little easier with the bearing and clamps added
    [​IMG]
    Now I just have to get it off the print bed, and do the second one :facepalm:
    Paul
     
  2. Toto

    Toto Staff Member Founder Administrator

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    looks ok ....... i think :avatar:
     
  3. Gary

    Gary Staff Member Administrator Golden Goat 2018

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    I look forward to breaking this next weekend.... :avatar::avatar::avatar:

    Cheers, Gary.
     
  4. ed

    ed Full Member

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    Looking good Paul :thumbup:

    Ed
     
  5. Toto

    Toto Staff Member Founder Administrator

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    Bad man Gary. :avatar:
     
  6. paul_l

    paul_l Staff Member Administrator

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    Started on the woodern bits ......

    This one is different again.

    I'm building this up from a sheet of ply to make alignment easier.

    A 6x2 sheet of 12mm ply was cut down to 53" x 20" (ish), Toto's standard baseboard is 54"x 21" (very ish :avatar:) so I can add 12mm sides and ends.

    From the off cut 2 x 25mm strips were cut and added to the underside to help keep the board flat

    [​IMG]

    Using a pair of 20T GT2 drive gears and the belt the distance between centers was established.
    Next center lines were marked out and the Motor mount marked up and fitted.
    Proof of the pudding, the bracket position was marked up the gear and leadscrew fitted.
    Anyone would think I actually meant it

    [​IMG]

    [​IMG]

    [​IMG]

    When I move the blue mount to the line the belt is nicely tensioned :thumbs:

    One down one to go.

    These will not be the final brackets - the next versions will use clamps to secure the bars, but there is not time at the moment, and on the slider unit the leadscrew will be slotted both of these changes will allow for easier assembly / disassembly.

    Paul
     
  7. Toto

    Toto Staff Member Founder Administrator

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    Yep ...... Just as I remember telling you how to do it. You are learning. Mind and bung in a bit ohms law and Flemings right hand corkscrew rule.

    Should work a treat. Oh ....... And some piethag ......pyethag ..... Theorem ...... Common sense.

    Looking good maestro. :tophat:
     
  8. paul_l

    paul_l Staff Member Administrator

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    Frankies wee brother - Phil - Philistein :avatar:
     
  9. Toto

    Toto Staff Member Founder Administrator

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    :avatar:
     
  10. paul_l

    paul_l Staff Member Administrator

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    A bit more work done this evening

    Can't find the dremel, so have had to use a junior hacksaw - no I know why I bought a dremel, forget this keep fit lark ......

    Two pieces of tube cut to length (ish), and the far end assembled.

    [​IMG]

    [​IMG]

    And boy can these take the weight - well they didn't appear to flex, we'll find out for sure when Toto gets to play with his big toys.

    Two more shafts to cut, when I get my breath back.

    Paul
     
  11. Toto

    Toto Staff Member Founder Administrator

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    C'mon you wimp. I've seen more energy in an asthmatic ant with a ruck sack on its back ....... Get rowing.
     
  12. Gary

    Gary Staff Member Administrator Golden Goat 2018

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    Toto wrote:
    This translates to : "I'll be there shortly to cut the rod for you..."

    Cheers, Gary.
     
  13. Toto

    Toto Staff Member Founder Administrator

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    :avatar:
     
  14. paul_l

    paul_l Staff Member Administrator

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    More like he's coming to give me another rod for my back :avatar:
     
  15. Toto

    Toto Staff Member Founder Administrator

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    Correct ........ Now ...... Paddle. :avatar:good work maestro.
     
  16. paul_l

    paul_l Staff Member Administrator

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    Time to resurrect this old chestnut

    Needed for the Dundee (if were invited) and the Elgin shows are two additional traversers (well one should have been finished by now But......)

    I've had time to re-think the progress so far.

    On the mark 1 the supports and drive were separate, this gave issues for alignment, but was generally easier to fit and maintain, the mark 2 was proberbly over engineered, and I never got it finished.
    As these are to be for Toto and my modular layouts for the foreseeable future, I thought I'd better design in some flexibilty, as Toto is forever moving the goal posts.
    Originally the modular layout boards were meant to be 54" x 21" x 5", the 21" being a little flexible depending on the tape used :whatever:, so the Mk 1& 2 traversers were designed and built to 21" with a single entry exit road at each end 10.5" from the front edge (this allowed for toto's dodgy tape measure).
    During Luib bridge's rebuild the 21" evolved to 28" (too many curries and the wasteline expands :avatar:) and the track is no longer 10.5" from the front edge :facepalm:

    To try and accomodate this I have made a few changes to the design.

    Traverser depth is now 24" (makes it easier to get the ply the correct width and less cuts)

    The entry exit position is variable, just align the entry road with the layout board track.

    This is what it will look like (I hope)

    upload_2018-5-13_21-33-56.png

    The blue entry road runs in a slot, and is moved and aligned with the layout track then locked in position.

    All that needs to be done is establish the distance (in steps) from the Zero position to the layout entry position (this can be different for each end), it is then a simple calculation to get the distance for each road on the traverser.

    The ends and slots are to be made from 18mm ply, the sides and entry board are made from 12mm ply.

    Paul
     
  17. Toto

    Toto Staff Member Founder Administrator

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    looking good and he's off to a flyer already. :avatar::thumbs: Glad to see you back on the case.
     

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