Author Topic: PRR K7a Stock Car build  (Read 1452 times)

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Chris333

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Re: PRR K7a Stock Car build
« Reply #30 on: March 10, 2024, 12:26:53 PM »
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He did do auto supports. Spending a little time supporting could probably get rid of most of the dimples.

Lemosteam

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Re: PRR K7a Stock Car build
« Reply #31 on: March 10, 2024, 01:19:58 PM »
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He did do auto supports. Spending a little time supporting could probably get rid of most of the dimples.

Yep, I understood that.  Need more to to eliminate the sags in the ends as well.

Overall, much better than this though:





bbussey

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Re: PRR K7a Stock Car build
« Reply #32 on: March 10, 2024, 01:22:30 PM »
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He did do auto supports. Spending a little time supporting could probably get rid of most of the dimples.

Correct, I just twisted most of the supports off. The A-end doesn’t need most of the support here because the wall is short. I could have gotten away with just supports on the end yoke top edges. Regardless, the result is still superior to FXD faces adjacent to wax support structure. All relief detail is there, including the smallest rivets. That never was possible with FXD.

With DLP and the Craftsman Resin, I’ve found there’s no need to slice under .50mm, as long as your arctangent is correct.

Also of note — there were no floors on this model, which allowed for additional supports on the inside walls.

My DLP results are far superior to anything I’ve printed via Shapeways, and that includes the White Towers and the EP3 detail parts.

Yep, I understood that.  Need more to to eliminate the sags in the ends as well.

Only the top edge of the end yoke needs additional support. Everything else on the end at every slice layer is supported by a body section that has build supports.
« Last Edit: March 10, 2024, 01:37:48 PM by bbussey »
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peteski

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Re: PRR K7a Stock Car build
« Reply #33 on: March 10, 2024, 04:42:23 PM »
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The model was printed at .50mm slices on .51mm XY pixel resolution and a 44.43° angle with the A-end of the body facing the plate.  The model printed in under 4 hours.

0.50mm and 0.51mm?  Those numbers seem to be rather coarse.  The printed body looks really nice with fine details. Or do I not understand the slicing process?
« Last Edit: March 10, 2024, 05:27:45 PM by peteski »
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Chris333

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Re: PRR K7a Stock Car build
« Reply #34 on: March 10, 2024, 05:14:01 PM »
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Think he means 0.05mm (0.0019") slices as that is the largest our machines will do.

bbussey

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Re: PRR K7a Stock Car build
« Reply #35 on: March 10, 2024, 05:46:18 PM »
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Oops.  Yes, .050mm slice thickness and .051mm XY pixel size.

I'm sold, but it will be a while before I buy a DLP.

If you juxtapose with what it costs to contract out for Shapeways, the DLP printer pays for itself in just a couple of projects.  I also bought the cleaning/curing station when I bought the DLP, night and day in the cleaning/curing aspect as well.
« Last Edit: March 10, 2024, 05:50:23 PM by bbussey »
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