|Forum: 3D modeler needed|
| Topic: Need Lots of People, Old Fashion, Workers, etc. ONGOING project|
|Need Lots of People, Old Fashion, Workers, etc. ONGOING project [message #101664] Thu, 23 October 2014 19:54 UTC
I am looking for someone to produce figures for our model trains. We are the oldest G scale manufacture in the country. I would need to be able to scale the figures in 1/24TH, 1:20.3 SCALES. Looking to produce several lines of figures, Old West town folks, Train workers, engineers, Lumber jacks etc. This would be a long term project. Number needed would be based on the affordability and your capabilities. Detail is very, very important. My contact information is as follows|
Ozark Miniatures Inc.
3461 S 5225 W
Cedar City, Utah, 84720
|Forum: General Discussion|
| Topic: General information on the new pricing formula|
|General information on the new pricing formula [message #101660] Thu, 23 October 2014 18:31 UTC
This topic is of a more general one so we can all gain some more insight on how the new pricing affects our models.|
For specific question and help with your model pricing go here:
This is a quote from https://www.shapeways.com/support/pricing and contains the basic formula behind the pricing:
How we price Strong & Flexible plastic
3D printing in strong and flexible plastic (nylon) is a relatively efficient process that relies most heavily on the amount of space your product takes up in a machine. Products that are dyed or polished are more labor-intensive. In order to align these costs with the price we offer, we price strong and flexible plastic based on Machine Space, Material and Labor per Part.
Labor - The number of parts that need to be handled individually during production.
Each individual part needs to be oriented and planned with other parts before printing. We call this step "tray planning." Then it must be cleaned, sorted and packaged. Dyed and polished parts need to go through a few more steps, increasing the cost per part.
For most products, labor is a relatively small component of the price, but for high part count products it can be very significant. See out Best Practices for High Part Count Models for more information on reducing the cost of multi-part models
Material - The amount of material needed to 3D print your product.
The volume of your part itself determines the amount of raw material that is used to produce it.
Making your model smaller or thinner reduces material cost. However, for most models material cost isn't the primary driver, so making your model a bit thinner usually isn't worth sacrificing strength or design integrity.
Machine Space - The amount of space your product takes inside our 3D printers.
We use the best industrial 3D printers on the market, some of which cost up to a million dollars. In order to keep prices as low as possible for our community, we do our best to pack every single build with as many parts as possible. Having printed millions of parts, we're now able to estimate the amount of space your part takes up in a tightly packed printer, and to charge you for exactly that much space (and nothing more!).
Generally speaking, bigger parts cost more. However, for certain models, we can reduce the cost by packing other parts inside of it. These models must be hollow, have cavity openings of at least 40mm, and be strong enough that they don't break when the inner models are removed.
For most models, Machine Space is the primary driver of production cost. Making your model smaller, or redesigning hollow models to allow other models to be packed inside of them, can reduce this cost significantly.
And here are some very helpful graphs by Mr Nib.
I will be hunting and collecting some more. But feel free to post helpful data here.
|MrNib wrote on Sun, 19 October 2014 04:51|
Since we're on the subject of pricing here's a quick analysis of pricing a hollow cylinder. In this case it's a 10 cm long cylinder with 2mm thick walls. The outside diameter is varied between 10 mm and 100 mm. The big take away is the point at which the ~40 mm diameter sphere can completely pass through the hollow cylinder there is a sudden price drop because machine space/volume also suddenly drops. Before this point machine space rises roughly with the square of cylinder radius. After this point the machine space rises linearly with cylinder radius. Things would be similar for a cylinder with a bottom but unless the bottom is also rounded there would be excess unused machine space even when the 40 mm sphere is touching the bottom. Machine space is a killer. You could run similar tests for other geometries to see what happens, if you have the time. In addition this technique can provide insight as to how other services might be pricing their prints especially if they aren't as transparent with their formula.
(When I mention machine volume it's the same thing as machine space.)
Edited to update table with old cost data and add the cost plot.
|MrNib wrote on Wed, 22 October 2014 00:40|
Here's a variation on the previous example. This time the wall thickness of the cylinder is not held constant. In this case the cylinder is simply scaled up in both the x and y dimensions, starting from a cylinder with an outside diameter of 10mm and a 1mm thick wall. The last cylinder has an OD of 100mm and a wall thickness of 10mm. This keeps the density calculation at a constant value of about 28.5%, so the old price curve does not reflect the old price penalty for density falling below 10% as in the last example.
I plan on doing a couple other examples, probably including a cup shaped configuration, because that's the type of stuff I've designed and am curious about. BTW, does anyone remember where the volume discount used to kick in for WSF?
[Updated on: Thu, 23 October 2014 19:05 UTC]
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