There are various resolutions at the company where I let prototypes:
0.0127 mm (equivalent to approximately 78.7 shifts per millimeter)0.0254 mm
(with this stage were plotted my part) - that is about 39.4 shifts per millimeter)!
0.0381 mm (for large parts whose edges can easily be smoothed ) (about 26.3 layers per mm)
0.0508 mm (about 19.7 layers per mm).
So you get a thickness of 0.0127 mm more or less from stage to stage of solution. The more layers, the longer the machine runs and correspondingly expensive is such a part.
One example: The buffer for the Diema_DL8 (German light railway) cost 60.00 in prototyping (3D-wax plotting). Then add up the cost of the first brass casting ( 5.10) and the postage.
The picture shows the first prototyping part made from the wax-plott. Itīs raw, I have to plane the steps you can see in this backlight.
This way (wax - brass model - rubber) may be a bit expensive, but by the reworking of the first cast the steps may be smoothed. Likewise, further mounted thin parts, which were not able to be prototyped, for example because it were too thin.
From this part a rubber mold will be created for the serial casts (depending on the size of around 25.00 - 30.00).
Lastly, then the cost of the casts themselves can depending on material and weight between 2.50 to 4.00.
I attached a small cost table in which each of you can gain an overview. To create less equal parts, then the cost are still very high, but the quality is accordingly.
For the way above, I have to push the size of the stl-file with a factor of about 1,04. The parts shrinkage in two stages during production. The first time during the molding of the wax model, then through the rubber mold. So I get my model in the right size at the end.
Here an other part for my Gmeinder 10-12PS:
I donīt know if a model builder would hammer out such a part of the same quality so ever - and then puts the price.
With each piece, the retail price relative to the bottom.
In my list above I have, however, included no costs for creating the drawings and which has been to realized in STL format.
Drawing is still a part of my hobby, we are rewarded by a precision I donīt want to miss.