Mossys 3D Models

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

  1. Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    Life can be a right bugger sometimes.
    We once had some prints, reprinted and Chris having sat with the printer for a couple of hours originally to get the colour balance correct to the original painting. The printer then saved the wrong file...
     
  2. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Rob

    I hope the printer paid for the re-run.

    I have corrected the sliced file for the K1 Cattle wagons, and they are awaiting their turn on the printer, it's currently printing two more mark 2 D1 wagons. I have decided that's the way to go for all opens, it's much easier to get the floor correctly seated and positioned.

    Mossy
     
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  3. Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    He did, Chris would have cheerfully choked him had he not lived in Leeds. Not long after we changed printer and have been very happy with the quality and service since then. The one that you have is from the 'new' printer (we have probably been using him for 6/7 years now).

    Looking forward to seeing the cattle wagon in all it's glory.
     
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  4. paul_l

    paul_l Staff Member Administrator

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    Ahh ...... the joys of 3D printing ...........

    If you have the lid detector setting set to off, you can always lift the lid during the print and add a bit more - espescially on long prints before going to bed. I found it worse on the Photon as the prints tended to fill the build plate to a larger extent and has a smaller tray.

    Paul
     
  5. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Given the title of this tread, I'm acutely conscious that most of it has been about bolster wagons and a cattle truck. I'm happy with the bolsters and the cattle truck hopefully is awaiting it's final print, so it's time to get back to the hopper wagon.

    The blinding obvious error that stopped things dead a week or so ago, was that the outer drop down doors couldn't because the axle would be in the way. I'm not sure which measurement I got wrong, but it's time to investigate and get the wagon back on track.

    Mossy
     
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  6. Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    You can always edit the thread title...but I for one am happy to see the diversions from the main event.
     
  7. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    I'm on my own as the ladies of my life (wife, daughter and granddaughter) have just left for a girly trip somewhere, so I have 2-3 hours of piece and quite to work out what's wrong with the hopper sketches. Then I can get the thread back on track with the odd diversion or two.

    Mossy
     
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  8. paul_l

    paul_l Staff Member Administrator

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    Take the chances when you can :avatar:

    Paul
     
  9. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Well what looked to be an awkward change to the hopper wagon turned out to be relatively simple and took less than an hour, so it's now number three in the list to have a test print produced. Nicely in time to watch the final stage of the giro, assuming the three wanders don't turn up early - chance taken Paul.

    Hopper doors integral with the body, and going to be printed on a tilt to minimise any pump pressure on the floors - fingers crossed.

    Mossy
     
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  10. Andy_Sollis

    Andy_Sollis Staff Member Moderator

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    I find as much as I don’t want to, you have to draw nearly everything, even if it’s not a part your printing, simply so you have everything in the correct place.. I’d suspect the end panels are fixed and only the middle doors open. Even the middle one may still only have one door open??

    that said, I’ve still got models where despite doing them under size to fit within something else, I still end up having to file some edges for fitment. Either I’m not shrinking enough or there is a ridiculous amount of expansion going on!

    I’m still stuck on the doors on my wagon.. I can see this being a long term project I keep
    coming back to. Paul will no doubt have Leek finished by the time I’ve designed the wagon (and in this case, it’s not one so common on this route)
    Andy
     
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  11. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Hi Andy,

    The P6 has 8 opening drop doors operated by monkey tails. The four outer doors are positioned outside the line of the axle, the 4 inner doors basically spilt the wheelbase, all 8 are hinged along the centre line of the wagon so fall inwards. It's a design used on all the NER hoppers, although the number of doors varies with each wagon.

    In terms of sketching wagons I actually only detail 1/4 of a wagon. i.e. half the side and half the end although I actually draw them full width. I sketch out the left half of the side and right half of the end. Any detail which is on the left but not the right or vice versa I leave until I have mirrored the body, then use a separate sketch to fill in the missing bits.

    Mossy
     
  12. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    When a cattle wagon isn't

    I have been on transport duty for granny day care in Manchester today but before setting off I fired up the printer with a test of the K1 cattle wagon giving it plenty of print time and also hours to drip off any excess resin. We got back about 3/4 hour ago and after making sure the boss was ensconced on the settee with a brew and Springwatch on the tv
    I opened up the attic hatch to hear the printer still running, what the $%^&&. On closer inspection there's a P6 hopper 80% printed and chugging away merrily, now I'm really confused.

    Back down stairs on the PC I open the K1 folder and fired up the sliced file to find a P6 hopper staring at me yet when I opened the chitu .stl file there was a K1 Cattle. Confusion reigns, but even stranger I then open the P6 folder, the sliced file contains a K1 cattle, the chitu file a P6 hopper. I think I need a lay down in a darken room or using black adders example to gibber quietly with underpants on my head and pencils up my nostrils.

    Anyway some renaming and moving of files is required in the morning. Having a nice printed P6 hopper is good but I still have the axle box to draw, the details on the drawing of the body are insufficient and so far no one I have contact has a drawing of the relevant box - a bit of a stand off for now. Tomorrow hopefully a print of the real K1 Cattle.

    Time for bed

    Mossy
     
    Last edited: May 31, 2022
  13. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    The most unlikely cattle wagon fresh from the wash and cure:

    IMG_1227.jpg

    Sadly my experiment with in situ bottom doors didn't work - pump pressure at its most obvious:

    IMG_1229.jpg

    A rethink required

    Mossy
     
  14. paul_l

    paul_l Staff Member Administrator

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    Maybe just put a section for mounting the etched W irons on to and fiddle the seperate doors to fit around them.

    Paul
     
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  15. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Hi Paul,

    What doesn't show very well in the photos is that the 6 doors which printed correctly each have a clearly defined gap between one side of the door and the chassis frame.
    The 2 which blew don't, so I really need to investigate that to figure out what's different. I think the 6 that worked had sufficient of a gap to release the pressure, the 2 which failed didn't. I need to dig about a bit.

    Mossy
     
  16. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    At last a sane and sensible cattle wagon without yesterdays mind bending confusion, who needs illegal drugs when you posess a fuddled brain and a 3d printer.

    IMG_1235.jpg


    Assembly will have to wait till Thursday as I am going pond dipping tomorrow, I'll try not to fall in, but keeping our grand-daughter dry might just be beyond the possible.

    Mossy
     
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  17. Andy_Sollis

    Andy_Sollis Staff Member Moderator

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    Just one suggestion that may help… but just a bit off topic to current discussion..

    someone had reported that the second or third print after a fep change was resulting in failures. I’ve actually had similar myself.. had a failure the other day and could t be bothered to rush to sort it out.. anyway I did today.

    the advice someone gave was to recheck the tension of the ring after the first print as the fep may have slackened… I was amazed to find when I cleaned my vat that although I had a drum skin, some of the securing screws were not even finger tight?? (I can assure you they were when inserted!!) and it wasn’t just one, I think I had 5 in total.
    Anyway, the next print with either be spot on or it will fail with a broken fep…..

    just thought I’d share..

    Blow about the file names.. again, I’ve done that myself and reprinted an older version in error. I must start removing printed files off the USB stick when done.

    Andy
     
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  18. Andy_Sollis

    Andy_Sollis Staff Member Moderator

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    I realise now that the doors are flat panels.. for some reason I had visualised the V shapes underside to discharge.
    Sorry! :cheers:
     
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  19. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    No probs Andy, the diagonal are just bracing across the doors.

    Mossy
     
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  20. Andy_Sollis

    Andy_Sollis Staff Member Moderator

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    Ha. Guess what I did last night… in all my hurry, I seem to have somehow loaded and printed an older version of the p-way huts. blow, :facepalm:
     
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