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Another bridge too far

Discussion in 'Members Personal Layouts' started by paul_l, Feb 8, 2018.

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  1. Apr 28, 2018 #121
    paul_l

    paul_l Staff Member Administrator

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    With bases

    upload_2018-4-28_22-58-53.png

    Paul
     
  2. Apr 28, 2018 #122
    paul_l

    paul_l Staff Member Administrator

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    1st test print started

    Maybe ready before I go to bed

    Paul
     
  3. Apr 29, 2018 #123
    paul_l

    paul_l Staff Member Administrator

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    Print done - 2h40m


    Not sure if the slats are too wide

    Paul
     
  4. Apr 29, 2018 #124
    Kimbo

    Kimbo Staff Member Moderator

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    Hi Paul, I think the second version is a closer match, but agree the slats might be a bit to wide.
    Kim
     
  5. Apr 29, 2018 #125
    paul_l

    paul_l Staff Member Administrator

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    Another attempt

    11mm base added to allow ease of fixing to the ply base, and lowered the print quality to 0.2mm layer height from 0.1mm and increased the from 30mm/sec to 40mm / to see the impact on quality and print speed
     

    Attached Files:

  6. Apr 29, 2018 #126
    paul_l

    paul_l Staff Member Administrator

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    Thanks Kim

    I'll see how this test turns out, as I also want to make one direction of the slats approx 0.5 thicker (with a 0.2 mm layer height that will be either 0.4 or 0.6mm).
    The current slats measure 2.8mm, I think 2mm may be closer to what I need, but that will depend on if I can get them off the print bed without breaking.

    Paul
     
  7. Apr 29, 2018 #127
    Toto

    Toto I'm best ignored Staff Member Founder Administrator

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    Certainly better than the first attempt Paul. Definately getting there.

    Toto
     
  8. Apr 29, 2018 #128
    York Paul

    York Paul Staff Member Moderator

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    Hi Paul, just looked at your upload file and maybe the slats are a tad too wide at 12mm or so... just trying to think if that makes the distances between ironwork unrealistic, :scratchchin: maybe bring them down to 10mm but then I could be quite wrong... I often am.:avatar:
     
  9. Apr 29, 2018 #129
    paul_l

    paul_l Staff Member Administrator

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    Test completed - 1 hour 40 min

    The one on the left with the additional plinth is the faster lower quality print, the one on the right the original print



    Hi Paul - The pitch of the slats is 14mm (2ft in 7mm)

    Paul
     
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  10. Apr 29, 2018 #130
    paul_l

    paul_l Staff Member Administrator

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    Counting the diamonds on the photo, it's approx 4 diamond in height, mine is giving 7, so looks like I need to increase the pitch :whatever:

    And need to reduce the slat width

    Paul
     
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  11. Apr 29, 2018 #131
    York Paul

    York Paul Staff Member Moderator

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    So the spacings on the lattice will be even greater I presume. How big will the bridge be Paul when finished? Sounds very interesting.
     
  12. Apr 29, 2018 #132
    paul_l

    paul_l Staff Member Administrator

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    To get the same number of diamonds I've had to go to 28mm centers, and also reduced slat size to 2mm

    upload_2018-4-29_16-54-30.png

    Now just need to print it

    Paul the bridge will be 4ft approx in length

    Paul
     
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  13. Apr 29, 2018 #133
    Toto

    Toto I'm best ignored Staff Member Founder Administrator

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    looking good now. :thumbs:
     
  14. Apr 29, 2018 #134
    York Paul

    York Paul Staff Member Moderator

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    That's an impressive size model:tophat:
     
  15. Apr 29, 2018 #135
    paul_l

    paul_l Staff Member Administrator

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    3h3min later



    Second one started - I will make a lower quality one to see the difference.

    Now just need to find out what colour to paint them.

    Paul
     
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  16. Apr 29, 2018 #136
    York Paul

    York Paul Staff Member Moderator

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    I think it depends on what period the bridge is being modeled in Paul. On the LMR many iron bridges were painted in micaceous grey... remember Stoke Liverpool Road bridge with the James and Tatton sign on it? That was painted micaceous grey in steam days I recall. Now on the ER and also Southern I've seen steel bridges painted micaceous silver (particularly on ex GCR routes) not sure what they did in Dundee tho. Any chance you can go look at old abandoned rail bridges in the area? As a ball park option I'd suggest mixing matt black with silver in suitable amounts to get the correct shading of colour.
     
  17. Apr 29, 2018 #137
    Toto

    Toto I'm best ignored Staff Member Founder Administrator

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    Couldn't you do circles ....... Only joking. That looks the biz. :thumbs: Great stuff and well worth the effort I think.

    Toto
     
  18. Apr 29, 2018 #138
    paul_l

    paul_l Staff Member Administrator

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    I just remember James Tatton bridge being black - but I think that was more grime than paint same goes for Longton Bridge as well.
     
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  19. Apr 29, 2018 #139
    York Paul

    York Paul Staff Member Moderator

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    The bow string bridge at Longton was also painted micaceous grey, the three bridges on City Road next to North Western Yard were the same colour also.
     
  20. Apr 29, 2018 #140
    paul_l

    paul_l Staff Member Administrator

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    So a dirty black with silver flecks with an expensive sounding name it is then :avatar:

    Cheers Paul

    Paul
     
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