Dabbling in Fusion 360

Discussion in '3D Modeling Projects' started by Rob Pulham, Jun 25, 2021.

  1. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Hi Paul

    Thanks for the suggestions, they pretty much conform to what I did, yes horizontal is best, yes inner face to build plate, since these wheels are quite small and light I used a combination of medium and small supports, yes I did the detect island function. The fundamental problem is the width of the inner boss, I guess its about .05mm so very nearly impossible to support, I think your suggestion of getting Rob to increase its thickness and turn it down later could solve the problem.

    Having said that I will try this new test I have set up first.

    Keep well mate

    Mossy
     
  2. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Well the second test was a big a failure as the first. Rob can you beef up that inner most hub extrusion and re-send me the .stl's please. I now have 3 pairs of the larger wheel without that inner hub, are they of any use Rob or shall I just bin them?

    Mossy
     
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  3. Andy_Sollis

    Andy_Sollis Full Member

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    Check your FEP and ensure that it’s clear. Just a scrape back of the resin with the black scrape will do. Ensure the FEP is clear and not white when you move the resin back. also ensure give it a good stir anyway and make sure you have a enough in…

    37D1A1DB-CBCA-46F1-BB8E-90D2ACE4EA69.jpeg
    This was a reprint of a 9 hr print that ran out of resin! And this was the last of the bottle.. awaiting pay day. Thank goodness this is my model and not someone else’s.
    Andy
    Ps. See your not the only one to have mega fails @Mossy
     
  4. Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    Hi Mate,

    I am sure that I can make use of them. I will thicken up the boss and resend them.
     
  5. Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    Ouch!, 'Like' didn't seem appropriate in this instance Andy.
     
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  6. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    I agree Rob nine hours for a serious ouch is a long long wait.

    I will cure the 3 failed sets of wheels and send them up to you, make of them what you will.
     
  7. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Since my printer is in the attic I try not to print on cold mornings, but it seemed ok today so I set off another print of my V1-1 brake 4hr 11min to wait. It finished about 20-25 mins ago, so I went for a look - ouch. Is this a problem with the temperature and cold resins?

    IMG_1018.jpg

    The only saving grace is it prints with the floor as a separate body, which is ok and I have found a spare body (not sure when that was printed but it looks ok) so a test build can recommence. Un washed, un cured and unloved.
     
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  8. Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    That's a shame, if you are going to bin it, can I have it?

    It would make a great basis for a grounded van body scenario. Unless of course you plan to do the same with it?
     
  9. paul_l

    paul_l Staff Member Administrator

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    If the dimentions are correct, then a bit of filler may fix the model.

    It may well be a temp issue, look at the supports in the same corner, they have failed as well.

    The model looks good tho'

    Paul
     
  10. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Rob,

    I have two, both are V1-1 bodies, this failure and also the one I screwed up before going to Northumberland. That has a perfect body and floor, the current failure is awful,
    would you like both or just one? There may be a couple of spare doors floating around somewhere as well.

    Paul,

    I have printed this model 3 times now using the same sliced file so I don't think it would have been a support failure. Having fished it out of the bin for Rob I can't see any support failures even though it looks like that on the pic, btw 3 out of 4 corners have the same failure.
     
  11. Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    I will take them both if you don't mind. Worst case I will end up dumping one of them but I may be able to make something of it and I do like a challenge
     
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  12. Andy_Sollis

    Andy_Sollis Full Member

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    I had the same with a signal box.. base printed then same as you had, split, curled then restarted.

    EE6A5937-1668-4719-8918-8D612C2ED0A9.jpeg 9C0B7F7B-DF6C-450E-BEE1-A349B791B037.jpeg
    the only reason that the collective minds could come up with was that some Debris had got in the resin (poss from a previous print ??) and just blocks the print. I tent to find I’m ok if straight from the bottle but if the resin has been in the vat more that 2 days, I have a 75% failure rate at some point across the bed plate.
     
  13. Mossy

    Mossy A classic grump Yorkshire man Full Member

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    Hi Andy,

    I don't think it was a debris problem there were 4 failures all along the same fault line, 3 of the corners and one in the door openings. I really don't know what happened, its the first time I have seen anything like it.

    Mossy
     
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  14. Andy_Sollis

    Andy_Sollis Full Member

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    Same here. Never had a failure like this, but that was all anyone could come up with? Something was blocking the corner causing the rest to print. It also stopped the scaffold at the same points, so I went with the something in the resin as I had had a failed print but thought I had everything out. :(
     
  15. Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    For those that it may interest. You will recall that I drew up and had printed/cast an LNER brake van stove. Well a few weeks ago I had the opportunity to see and take photos of the real thing ( iahve only just got around to downloading them from my phone.

    20211002_123804.jpg

    20211002_123813.jpg

    20211002_123820.jpg

    20211002_123832.jpg

    20211002_123839.jpg

    This is situated in the NER H2 Stores van which is currently the subject of a major restoration by the Stainmore Railway and LCLT, based at Kirkby Stephen East Station in Cumbria.
     
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  16. Andy_Sollis

    Andy_Sollis Full Member

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    :scratchchin: Looks vaguely familiar?? :avatar:
     
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