3d printing

[Sgt_Bill]

the prints look good so i need a resin printer to get a clean nice print

thanks Bill for the print test.

now i am going to see how a 4 and 6 pound cannon will print at 1/4 scale

here are the files

Dave, Here are those 2 files. Same parms run time 2 hrs. I ran both file objects on the same print run. Taller object more layers. Bill

 

[Sgt_Bill]

here is the Indiana

View attachment 441265

here is the salvage of the engine

View attachment 441266

and here is the engine and boiler for maybe a cross section of the hull at the engine room. Lots and lots of parts to make. But one heck of a model of the hull section.

View attachment 441267

Is these a second view from another angle of this engine?

 

[Dave Stevens (Lumberyard)]

i think those really look good

so those were a 2 hour printing? yikes! that makes it not very practical to print guns for a kit when you need 28 guns for a Hahn confederacy.
but it is not man hours its machine time.

when you print these are the cannons standing up vertical or laying down horizonal?

did you have to use supports for the trunnion sticking out at the sides and the ball at the end?


i am trying to work out an alternative for the pewter cast guns i am supplying with the Hahn timbering sets. The person who has been doing the castings is telling me pewter casting in a death spiral the natural rubber for making molds is no longer available in the US. When you buy it out of the country the cost and shipping is outrageous and the cost of pewter is skyrocketing out of control.

 

[Dave Stevens (Lumberyard)]

Is these a second view from another angle of this engine?

yes there is a front, back right and left view and a CAD drawing in the works.

that project was going to be an engine room diorama of the Indiana. My problem right now is not knowing enough about steam engines to know what some parts look like. If you are interested in the engine we can start a project topic and i can post all i have.

 

[Sgt_Bill]

i think those really look good

so those were a 2 hour printing? yikes! that makes it not very practical to print guns for a kit when you need 28 guns for a Hahn confederacy.
but it is not man hours its machine time.

when you print these are the cannons standing up vertical or laying down horizonal?

did you have to use supports for the trunnion sticking out at the sides and the ball at the end?


i am trying to work out an alternative for the pewter cast guns i am supplying with the Hahn timbering sets. The person who has been doing the castings is telling me pewter casting in a death spiral the natural rubber for making molds is no longer available in the US. When you buy it out of the country the cost and shipping is outrageous and the cost of pewter is skyrocketing out of control.

Dave you can print / replicate the feature. I can print 28 in 2 sessions. I actually did three of each. Rarely there is a support failure but they do happen. Also they are fragile until they cure a bit.
I like them horizontal. Verticle would be time consuming. 3 sec per .015mm exposure, another 10 sec lift/plunge/ reset . At 13 sec per layer that's 36mm piece/10 mm platform (3066 layers x 13 sec = 11 hours) Check my math. But you could definitely get all 28 in one session. I let the machine select where the supports are and there were 8 down the gun, one each on the trunnions and one on the button. I selected smallest supports.

 

[Dave Stevens (Lumberyard)]

I like them horizontal. Verticle would be time consuming.

hum interesting i was going to try horizonal but i thought what about the bore hole there is no support so would it collapse in on itself?

 

[Dave Stevens (Lumberyard)]

print testing a 4 and 6 pound cannon at 1/4 scale

here are the cannons as printed the block at the bottom is the support structure for the trunnions



it looks scarry and how do you get the cannons out of the block. Well the support structure can be adjusted. it is actually hollow

 

[Dave Stevens (Lumberyard)]

as a matter of fact it is so thin you can see through it

 

[Dave Stevens (Lumberyard)]

cracking open the support block you can see the only place it is touching the cannon is at the trunnions

 

[Dave Stevens (Lumberyard)]

no doubt about it the bigger the cannon the better the results with a filament printer

but for some reason the bore is not printing right

 

[Dave Stevens (Lumberyard)]

it is clear i am not getting the finer detail with a filament printer when compared to the 3D object model.
so if your looking for fine detail on small parts a resin printer is the way to go.

 

[JerryTodd]

You'll never get "fine" detail with a filament printer because the layers are significantly thicker than a resin printer lays down. Most folks here are working is smaller scales than I am, and for carvings, guns, wheels, figures, anchors, and all the details 3D printing can provide, filament can't come close to resin in that regard.
It's good for printing hulls and bigger stuff where detail isn't an issue, and even then it requires some level of "finishing" like sanding and filling you don't usually need to do to resin part.

A 10 inch Dahlgren pivot gun...

Period drawing


3D model


Resin printed 1:36 scale model partially painted

 

[Dave Stevens (Lumberyard)]

You'll never get "fine" detail with a filament printer because the layers are significantly thicker than a resin printer lays down.

No doubt about it i can see it in the test i have been doing.

 

[Sgt_Bill]

I like them horizontal. Verticle would be time consuming.

hum interesting i was going to try horizonal but i thought what about the bore hole there is no support so would it collapse in on itself?

I've never experienced collapse on the bore hole. In my experience, there appears to be enough structural integrity to span about 3/16" at .015mm layers. I imagine thickness of the layer and cycle time has much to do with where the supports are placed. Resin is hardened by layer through glass with UV lighting from the bottom. The build plate then rises to allow resin to cover the bottom of the previously hardeded layer. Then lowers to the build plate and the process recycles. Structures are built upside down.

 

[Dave Stevens (Lumberyard)]

test

 

[Dave Stevens (Lumberyard)]

Is these a second view from another angle of this engine?

 

[paul ron]

wow you guys blow me away!
whenever i visit microcenter, i stop at the 3d printers and marvel at all the hardware available which seems to confuse me the most... its intimidating. then the 3d software is a chalange.

i once worked in autocad and did parametric programing in lisp... but only for drafting firms. back when autocad hit the market, it was exclusively for professionals in engineering and way too expensive for a hobbiest. the later add on 3d modeler and animator was far too davanced for me at that point.

the very first 3d printers were uv extruders and still in the experimental stages.

this technology has certainly come a long way and is very affordable. but i doubt this old dog will be able to learn any new tricks.

 

[Dave Stevens (Lumberyard)]

this technology has certainly come a long way and is very affordable. but i doubt this old dog will be able to learn any new tricks.

if you have a back round in CAD any CAD software you more than halfway there. for sure CAD and 3D printing has come a long way, back in school i took shop classes using the typical woodworking tools. Shop classes have changes and my grandsons took shop and it was all CAD 3D printing and robotics.

there are so many free CAD programs, You Tube how to videos and forms like this one to help.

learning 3d printing is easy i starting from knowing nothing, was given a printer and figured it out in a week. Now i am tweaking 3D printing and refining it but the basic is kids stuff, it is taught in high school.

after years of model ship building i found myself getting bored. All ships are pretty much built the same with the same construction and parts. Now with 3D modeling it expanded the hobby to creating a diorama of an engine room or better yet a diorama of steam ship under construction or if you really want to get fancy a steam engine that can actually move. CAD and 3D printing has set a much higher bar in model engineering.

 

[Model Monkey]

We're having good success with 12k resin hobby printers by Phrozen and Elegoo. They use LCD screens to harden liquid resin in a vat. They aren't expensive (~$300 USD) and detail reproduction is superb.

Our go-to resin machines are made by Formlabs which use lasers to harden liquid resin in a vat. However, Formlabs machines are intended for professional, commercial-grade printing running 24/7, not hobbyists, and are therefore extremely expensive (~$4500 USD).

The photos below are of model cannons we printed on Formlabs machines but our Phrozen and Elegoo machines produce identical detail to what you see here. In some circumstances surfaces are even smoother and detail sharper with Phrozen and Elegoo than what you see here.

 

[Jimsky]

I am a big fan of resing products but...I cannot paint. I love the results of #D prints, with some modifications, you can produce barrels mostly for each pattern with much detail! Oh, and I forgot to mention, that with just a single click, you can scale it down to any scale.

@Model Monkey on your printed gun barrels, I belive they should have more reinforcement rings at the cascabel, but it may well depend on the year and pattern used in the design.

I just bought my first airbrush and made a fist foot in the airbrushing. Who knows if I can learn how to paint? In the past, all my painting jobs, the airbrushing or handbrush ruined the work...