Update oktober 2015
For the little NSB type IV I have received four drivers and a cab with sidetanks 3D printed in high detail stainless steel from Imaterialise. The wheels (without rims) but with integral half axle came out quite well. The turned steel wheel rims in the picture I have already pushed onto the wheels. These rims are from THE 2MM Scale Association (2MMSA). They where pressfitted from the back onto the wheels with handforce.
Comparison with 7mm DIA coach wheel (left)and 7mm DIA driver (right) from the 2MMSA
|Steel wheels with steel rim attached|
I will go further with the steel version for this project. I have two ideas:
Use separate wheel rims turned in steel from 2MMSA. I will ask them to make a version where the little flange that keep the wheel in the right position is made on the inside and not on the outside.. The 1mm integral half axle, I will increase to 1.5mm and turn it down to 1mm for accuracy.
Alter the STL. file to incorporate the flange a little over scale and then turn it down to the right profile. The 1mm integral half axle, I will also here increase to 1.5mm and turn it down to 1mm for accuracy.
Imaterialise warned me that this may not work out well because of thin walls and the general shape. They where right:
They were able to produce the thin wall (0.3mm) but the model wharped in the prosess. If I shall go furter with this I will try thicker walls and put in preliminary reinforces like closing the cabsides and connect the two sidetanks. By using tabs to connect , It should be easy to cut off the reinforcements.
|Comparison with 1 EURO|
|Silhouette makes the warping evident|
|The steps from the cab came separate.|