Author Topic: This week on how far can we go, 3D Printed Brake Rigging  (Read 623 times)

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Erock482

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This week on how far can we go, 3D Printed Brake Rigging
« on: October 19, 2021, 11:43:07 PM »
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I've been working on a 3D Model of a D&RGW Class 8 3000 Series box car in HOn3, and have decided I'm going to go nuts and try something new and push the limits on the Photon Mono X.

Behold, an attempt at Brake Rigging! [ Guests cannot view attachments ]

In the past, I have found that I can do HO Scale grab irons at around 1.25" diameter in a vertical orientation on the sides of cars or if on the roof or deck of a car. So using that knowledge, air lines, fulcrums, and rigging have been added! And I'm dialing in the grab irons on the car itself, I find most horizontal car side applications need about 1.5" diameter to print without warping.

First test at .05 Layer height is on the machine, we'll see how it looks in the morning

peteski

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Re: This week on how far can we go, 3D Printed Brake Rigging
« Reply #1 on: October 20, 2021, 12:33:16 AM »
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That is great, but how about the fragility?  No problems if it is a display-only model, but how about a model that is used in operating sessions on a layout?  I'm not trying to diminish your achievement  - I'm just curious.
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Erock482

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Re: This week on how far can we go, 3D Printed Brake Rigging
« Reply #2 on: October 20, 2021, 12:40:21 AM »
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I find the grab iron application to be quite sturdy, not as good as wire but still seemingly up to the task.

The brake rigging on the other hand I'm not sure, Longer spans and such will make them more fragile, atleast with the current resin I'm using.

A mix of sirya blu with the standard gray I'm using is a more durable option, and would likely make them stand up quite well to regular handling. I just havent dialed in the right mixture between the two that yields a good mix of durability and detail

peteski

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Re: This week on how far can we go, 3D Printed Brake Rigging
« Reply #3 on: October 20, 2021, 12:56:25 AM »
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I find the grab iron application to be quite sturdy, not as good as wire but still seemingly up to the task.

The brake rigging on the other hand I'm not sure, Longer spans and such will make them more fragile, atleast with the current resin I'm using.

A mix of sirya blu with the standard gray I'm using is a more durable option, and would likely make them stand up quite well to regular handling. I just havent dialed in the right mixture between the two that yields a good mix of durability and detail

Thanks!  That exceeds my expectations. I guess with all the different resins available, some custom mixtures can result in sturdy, yet flexible parts.
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Chris333

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Re: This week on how far can we go, 3D Printed Brake Rigging
« Reply #4 on: October 20, 2021, 01:45:07 AM »
+1
You might want to print the underframe separate from the body. You could get a ripple dimple down the side of the body where the layer with the underframe ends.

Ed Kapuscinski

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Re: This week on how far can we go, 3D Printed Brake Rigging
« Reply #5 on: October 20, 2021, 10:34:18 AM »
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Now make it actually work.

Erock482

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Re: This week on how far can we go, 3D Printed Brake Rigging
« Reply #6 on: November 11, 2021, 11:30:37 PM »
+7
As most projects do with me, they get about 50% off the ground and then life takes over for a while before you can get back to them.

First attempt had some delaminating issues, so second go I added some supports to help carry the long span of the break rigging. Overall, I'm quite satisfied with the results. Need to trim out the supports, string in some truss rods, and get this underneath a car body.
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robert3985

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Re: This week on how far can we go, 3D Printed Brake Rigging
« Reply #7 on: November 17, 2021, 10:44:33 AM »
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As most projects do with me, they get about 50% off the ground and then life takes over for a while before you can get back to them.

First attempt had some delaminating issues, so second go I added some supports to help carry the long span of the break rigging. Overall, I'm quite satisfied with the results. Need to trim out the supports, string in some truss rods, and get this underneath a car body.
(Attachment Link) (Attachment Link) (Attachment Link)

Make sure to post some photos of this painted up.

Cheerio!
Bob Gilmore

Ed Kapuscinski

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Re: This week on how far can we go, 3D Printed Brake Rigging
« Reply #8 on: November 19, 2021, 11:13:46 AM »
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Yeah, but does it work? :D