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Showcase cover image for Motorcycle

Project Information

I used Rhino and Aspire for this model. I did this out of mdf, so it's very brittle. I need to strengthen it up, but can't decide to coat it with the powdered metal to make it have the bronze effect or just a clear resin to have the natural look. Some of the parts, such as the engine which require quite thick material, I sliced because of length of my mills. Most of the other components didn't need to be sliced. I decided to use a silver nickel metal coating, but it's still pretty fragile, so I need to quit using mdf and figure some other material.

If I've said this once, I'll said it a dozen more times, the double sided feature in Aspire is their best upgrade yet. This particular model was done in eight different Aspire (double-sided) files. I tried to group different components where it would fit best on the thickness of wood, i.e. the headlight and rear seat was cut out of the same piece of wood. The engine was sliced in half and was two double-side components cut out of the same piece of wood.

When I coat it with the metal coating, I mix 325 mesh powdered metal with resin and use a paint gun with a 2.3mm nozzle. After it's set, I sand off the resin with steel wool and a soft wire brush to bring the metal coating out. Some models I've done you would think it was sent to a foundry and actually bronzed.

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Comments

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Turned out great! I hope you will add pictures of this as you finish it…
I've been doing double-sided stuff since the beginning but can see where some might find the new feature helpful. One of my favorites is the Molding Toolpath and once I finally pop for the proper bits I'm hoping to make use of the Thread Milling Toolpath. Aspire is certainly well named!
Welcome to LumberJocks as well! Look forward to seeing your future posts!

Mike
 

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Turned out great! I hope you will add pictures of this as you finish it…
I ve been doing double-sided stuff since the beginning but can see where some might find the new feature helpful. One of my favorites is the Molding Toolpath and once I finally pop for the proper bits I m hoping to make use of the Thread Milling Toolpath. Aspire is certainly well named!
Welcome to LumberJocks as well! Look forward to seeing your future posts!

Mike

- mikeacg
Thanks Mike. I see some of your posts on the Vectric Forum as well, so you may see some of my projects where I posted there posted here as well. This site definitely gives you a lot of new ideas.

Gary
 

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looks small with lots of detail, very good.
 

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Nice work!!!
This model gives me the itch to go for a ride!!! ;-]
 

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That's amazingly realistic for what looks a small model.
I'm interested to see how you finish it.
A good looking ride.
 

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That's amazingly realistic for what looks a small model.
I'm interested to see how you finish it.
A good looking ride.

- crowie
Actually applying the metal powder is fairly simple and once you do it, you'll find a lot of projects to apply it on.
First you need a few inexpensive tools:
1: Spray gun with a 2.3mm nozzle for a little over $40 on places like Amazon or Ebay. Not the same one at Harbor Freight which is only 1.6mm. (Google "Titan Gravity Feed HVLP Spray Gun 2.3mm nozzle")
2. A digital scale that measure grams ( about $10 on Amazon).
3. Plastic container to clean gun. You need about a cup Acetone to clean the gun. Completely disassemble and clean each part immediately after you have sprayed the resin to avoid it setting in the gun. Takes about 5-minutes to clean the gun, it takes about 10-minutes when the resin starts hardening.
I get the metal powder and resin from https://www.metalpowdersusa.com although he doesn't list the resin on his website, you can call or email him from his website. The resin is a lot thinner than fiberglass resin you get at Home Depot or an auto parts store. The thinner resin when mixed with the metal sprays better. Make sure you paint the model with Primer before applying the metal mixture.

I use a board with nails sticking out to suspend the model while spraying, sitting on some cardboard. Use Steel wool and a light gage wire and nylon brushes to sand off the surface resin after it has set for several hours. You may also apply some patina to highlight parts. If you sand through, mix up a little in a plastic cup and touch up with a flux brush.

MIXING RATIOS FOR METAL TO RESIN BY WEIGHT IS: 3 GRAMS METAL POWDER TO 1 GRAMS RESIN TO .1GRAM OF MEKP HARDNER. (i.e. 100 grams powder to 34 grams resin to .3 grams mekp.)

Although Aspire has a slicing feature, it's not always applicable, so I use Rhino, Netfabb and ZBrush to manipulate the models, however, there should be a lot of free software that will work. I found the software that runs my 3-D Printer also has a slicing feature.

Gary
 
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