Mossys 3D Models

Discussion in 'Workshop Benches' started by Mossy, May 19, 2022.

  1. paul_l

    paul_l Staff Member Administrator

    Messages:
    9,848
    Likes Received:
    5,902
    Joined:
    Dec 5, 2015
    There comming thick and fast now ........
     
  2. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Paul,

    Quite a bit of the recent stuff have just been drawing practice and I have no intention of actually printing them, the C5 is exactly a case in point.
    I used the C5 as a way of practicing using the modify > align function which I only recently found and have only tinkered with before. It's a really useful function.
    Having mused about how easy it would be to create a C6 from the C5, I did the same daft trick as before of trying to merge the C6 into the C5 project - a very very stupid idea.
    Once I saved the C5 project as a C6 and rebuilt the side it was a simple redraw of the side:

    Screenshot 2022-10-24 084311.jpg

    Mossy
     
    jakesdad13, paul_l and Rob Pulham like this.
  3. paul_l

    paul_l Staff Member Administrator

    Messages:
    9,848
    Likes Received:
    5,902
    Joined:
    Dec 5, 2015
    The skill appears to be working out when to create the copy, or merge the bits to allow further modifications later.
    For the Van I have pinched (re-used) the brake and buffer assemblies from the 7 ton Timber wagon. I suppose the trick I have to learn is how to get all the standard parts into one project.
    Must admit once I get into a project it becomes quite satisfying.

    Paul
     
    Rob Pulham likes this.
  4. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Paul

    I know what you mean I have been trying but not totally successfully to get standard parts organised into separate folders/projects. Having said that with the NER there isn't a great deal of 'standard parts' things seem to have been constantly evolving. What I have got grouped together are things like axle boxes / springs / W Irons, buffers and brake gear, but they tend to be separate projects grouped into folders rather than a single project.
     
    paul_l likes this.
  5. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Sorry can't stop playing with Fusion. She who must be was out on baby sitting duties last night so I had the evening to myself and decide to tackle a wagon that's on my print me please list, all I need to do so is the simple :headbanger:task of drawing it. The subject is an S4 ironstone hopper, one of these beasties:

    scan0003.jpg

    Precious little detail to work from just a scale sketch but fortunately 3 excellent photos, all culled from Peter Tatlow's book, I hope he doesn't mind.
    No plan view to get an idea of the hopper doors etc, but I know what other NER hoppers look like so that bit will need ad-libbing.

    Anyway I knocked off at about 1:00am last night and picked things up again at 7;00 this morning and have what I believe to be a decent 1/4 body drawn, now on a tea toast and smoke break, pic's to follow.
     
  6. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    External views

    Screenshot 2022-10-25 102336.jpg Screenshot 2022-10-25 102510.jpg

    Internal View

    Screenshot 2022-10-25 095823.jpg
     
    Andy_Sollis likes this.
  7. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    As always when you think your - look again. Hoppers doors modelled (but my fiction as no drawing available). Missing bracket to link L shaped stanchion to chassis the front and second support linking the end stanchion to the body. This time I think I am done with the body but leaving it to fester for a while.

    Screenshot 2022-10-25 192900.jpg Screenshot 2022-10-25 192943.jpg
     
  8. paul_l

    paul_l Staff Member Administrator

    Messages:
    9,848
    Likes Received:
    5,902
    Joined:
    Dec 5, 2015
    Looking good

    I've still not got the knack of drawing a quarter at at time, you never know :scratchchin: :avatar:

    If you put a fillet on the top edge you can make the sides look thinner - just an optical dillution, but as Tesco's would say "every little helps"

    Paul
     
    Andy_Sollis likes this.
  9. Andy_Sollis

    Andy_Sollis Staff Member Moderator

    Messages:
    3,896
    Likes Received:
    3,622
    Joined:
    Aug 4, 2018
    That looks smart..

    (I’m starting to sound like a broken record… one day I will progress mine, but need to clear the bedroom as little lad has learnt how to climb out his cot! So computer and model stuff are no longer safe.)
     
  10. Andy_Sollis

    Andy_Sollis Staff Member Moderator

    Messages:
    3,896
    Likes Received:
    3,622
    Joined:
    Aug 4, 2018
    I tried that once.. by the time I mirror imaged the other Parts it was no longer the correct size.
     
  11. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Paul

    Drawing a quarter at a time saves shed loads of time and frustrations. There's a few things you need to be careful about though.
    Spot things that don't mirror across, they need adding in after doing the mirror - I've fallen foul of this quite a few times.

    Three examples from this wagon are, the brake ratchet is attached to the left side of the end, not the right - it's currently a separate body to be attached after mirroring, also there's a pivot block for the brake lever that needs to be attached to righthand stanchion of the end again to be added later and on the side there is a 3 run ladder between the end stanchion and the short one on the right hand half of the side but not the left. These will be .9mm wire so the holes have been drawn but haven't been cut another later job.

    The other major thing to be careful of when the side or ends of a wagon aren't mirror images but are identical, again this beastie is a case in point, the ladder end is on the right of both sides. Mirroring doesn't work is a case of copy, rotate and carefully fit into position. The align function is really good at ensuring everything lines up properly.

    All of which makes it sound like a chore but a little forward planning helps, something I'm b....y awful at.

    Your filleting to "thin" the sides and ends sounds like a good idea (they are current .75mm thick) which I may well give a try. When I finally get the thing finished I am going to ask you and Andy on how the ^&*%$£ I should print it, I am really struggling to visualise which bits to print together or as components.

    I'm currently frying my brain on the geometry of end brakes, but think I have finally cracked it after consuming half a box of tea bags and far to many smokes!

    Mossy
     
    Last edited: Oct 26, 2022
    Rob Pulham likes this.
  12. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Andy,

    You have my sympathies. All my print gear, tools and chemicals are in the attic orders of swmbo, grand kids protection measures which is why nowts been printed for the last month or so - it's just been far to cold. The PC sits in the dining room but gets lock when not in use, our grand daughter has already figured out mobile phones she's not getting anywhere my PC!

    Mossy
     
    Last edited: Oct 27, 2022
    Andy_Sollis and jakesdad13 like this.
  13. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Overloaded on tannin and nicotine I have finally come up with a 'logical' structure for the end brake linkages. It's the best I can do given the lack of detail on the sketches. If someone can study the attached diagram and tell me if I have it wrong.

    Pushing the brake lever down causes an upwards action on the linkage and a clockwise rotation of the first pivot beam and short vertical linkage. That causes a movement to the left of the horizontal linkage. Then the vertical linkage rotates about a central pivot reversing the left movement to a right movement. This causes the brake to rotate anti-clockwise about it pivot, which drives the brake shoe against the wheel. Or so my feeble brain thinks. Right or wrong?


    Screenshot 2022-10-26 201612.jpg
     
    jakesdad13 likes this.
  14. Andy_Sollis

    Andy_Sollis Staff Member Moderator

    Messages:
    3,896
    Likes Received:
    3,622
    Joined:
    Aug 4, 2018
    Right, apart from the brake lever is 90 degrees out. Although I seem to think that first clockwise turn is a fixed 90 deg angle, otherwise nothing would happen
     
    Last edited: Oct 27, 2022
  15. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Andy It's an end brake lever not a normal side lever. A specialty of the the Stockton and Darlington which continued to be used on what became the Central District of the NER, that's why it appears to be 90 degree out of alignment.

    The first clockwise turn, it about the only clear thing on the diagrams and I have drawn it as shown, one arm horizontal the other angled down to the left.
     
    Last edited: Oct 27, 2022
    Andy_Sollis likes this.
  16. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Well I have reached a logic end of game, almost - I still have the axle box to draw, the details from Peter Tatlows book are vague so I have posted a message on the NERA forum asking if anyone know which axle box it is and is there a diagram (I can live in hope). The only response so far it to look at a series on photos in the association archive, these are rather good but again the axle box detail isn't great, I may end up add-libing it. I have also drawn a running plate to cover the chassis, none of the photos shown one and as its a separate body it can be added in or left off. So it currently looks like the screen grabs below. I'm now sorely temped to have a go at the 8 ton S1 hopper, I know Bill Bedford has already done one, but it's something to do.

    Screenshot 2022-10-27 101635.jpg Screenshot 2022-10-27 101729.jpg Screenshot 2022-10-27 101921.jpg
     
  17. paul_l

    paul_l Staff Member Administrator

    Messages:
    9,848
    Likes Received:
    5,902
    Joined:
    Dec 5, 2015
    Impressive.

    If you keep the W iron assembly as a seperate part, then if the additional information ever appears, then just swap out the changes (turn on/off via the eye tool) and re-export the model as an .stl - I do this for the numberplate changes.

    Paul
     
    Andy_Sollis and Rob Pulham like this.
  18. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Paul

    The plan was always to keep the W iron assembly separate, there's one of my standard extrusions on the rear plate which fits into a slot cut into the solebar, or so the theory goes.
    In terms of printing it I was going for chassis as one print, body a second but printed vertically upside down so I can easily support the legs. Then all the ancillary bits separately. but I'm open to suggestions from the 3d print masters - you and Andy. Something like this:

    Screenshot 2022-10-27 124406.jpg Screenshot 2022-10-27 124457.jpg

    Mossy
     
    paul_l, Andy_Sollis and Rob Pulham like this.
  19. Andy_Sollis

    Andy_Sollis Staff Member Moderator

    Messages:
    3,896
    Likes Received:
    3,622
    Joined:
    Aug 4, 2018
    If you print upside down your going to get the vacuum effect. Or do you mean upside down as it would appear on the base plate?
    If you make the hopper doors a separate fitting you can leave air gaps at the top. Depends on where you can live with any support marks the most. Inside the hopper can be covered with a load or made to look like rust damage.

    It’s up to you. Both have pros and cons.

    now, stop it with these wagons. It’s depressing me I can’t finish mine :confused:o_O:oops::(:giggle:
     
    jakesdad13 likes this.
  20. Mossy

    Mossy A classic grump Yorkshire man Full Member

    Messages:
    1,540
    Likes Received:
    2,320
    Joined:
    Sep 8, 2020
    Hi Andy,

    Yes I mean fully upside down with the supports on the top pf the wagon. Fortunately its pan flat with a bit of care removing the supports it would just need a quick run down of a flat sheet of wet and dry. And yes the hopper door assembly would be a separate print so no nasty vacuum effects.

    As for stopping drawing wagons, what's a retried man supposed to do. I barely know which day of the week it is, except for Wednesdays, granny day care which often requires granddad as well followed by an hour of learning to Ballroom and Latin dance, aka ritual humiliation and self abuse the only saving grace being I stand on her feet far more often she does on mine!

    Having nowt to do I have made a start on the S1 hopper, which so far looks like a Victorian bath chair but I'm sure will look good when it's done. It also has end brake lever, but the whole brake mech is below the chassis and I think will be much simpler. Dangerous last words!
     
    jakesdad13 and Andy_Sollis like this.

Share This Page