Gilera Bi4 Nordwest 3d scanning/modelling

[siplitaro]

Always congratulations for your passion that you put in the project and that produces remarkable results ... I think the candle does not screw it ..

[Duranti]

Thank you siplitaro, I'm glad you are enjoying the project! 

Haha, I will of course make a 1:3 scale spark plug to fit the engine! 

This project has gone from being intended as a digital model only, and then becoming the 1:3 scale Bi4! There is still work to be done to get it as complete as possible, and I'm still searching for some parts, and waiting for other parts to arrive in the post, eventually the project will be complete, including the sparkplug, haha! 

[Duranti]

A few pictures of the finished ABS left hand side crank case half, it printed with pretty good results. And also with M3 cylinder/head bolts threaded in place.

I have designed a solution to allow for the sprocket to rotate freely, using a twin 608 bearing supported PC shaft. I purchased a new sprocket one month ago on ebay, and I am still waiting for it to arrive (!) in the post, frustrating, I will soon have to purchase another one so that I can finish that area of the engine.

Also I will design a solution to allow the gear lever up/down movement, for a certain amount of realism! 

Tomorrow I will print an updated right hand side crank case half in ABS, the print process takes approximately 11 hours, which is (same as the left hand side) one of the longer prints I have done, but it's satisfying when it's finished and a beautiful part is revealed! 

[Matte]

Slurp slurp, delicious..........

[33new]

Great job Duranti, wonderful !!!

[Duranti]

Thank you 33new, I'm glad you are enjoying the build! 

I am printing the right hand side crank case half right now (see picture below), it should be finised this evening, I will post pictures as soon as it is ready! 
The print has 1.5mm wall thickness which makes it very ridgid, and allows for threads to be added (without compromising the integrity of the part), and 10% infill.

[Duranti]

And now for the right hand side crank case half in ABS, it printed well! 

I downloaded the latest Ultimaker software yesterday (before printing this part), with some new updates, I especially enjoyed the new updated overhang settings, which improves the surface quality on overhanging areas (every surface supported by supportmaterial between horizontal and up to approximately 40 degrees). This improved the surface quality significantly!

One factor when printing ABS is the shrinkage while cooling down the finished part, the bigger the part the more shrinkage must be account for, but I have managed to keep dimensional stability on the crank case halves, and they align very accurately, which is nice!

Next up will be some small parts; spark plug and gear lever, I will post some pictures later today of the finished CAD models. 

I am searching for a set of Nordwest 600 E30PV2A carburators (the don't have to be working, just have to be complete), because this model has to have carburators to be complete! If anyone has a set for sale, please let me know in a PM, thank you. 

[Duranti]

Here are some pictures of the gear lever scanned and modelled. The modelling was not easy, and it's not super accurate, this due to the gear lever being a "well used" part, and also initially it looks like it's a forged part, that has had the flash ground off, and after that it has been sandblasted, so the curves of the lever are very organic due to the different manufacturing processes it's been through before becoming a finished product. The general geometry though is very close in accuracy.   

A question for anyone who might know; I am searching for the correct UNI/ISO/DIN/JIS standard that is being used for the serrated spline (scanalato) used on the gear lever/shaft, does anyone know this information?

[Duranti]

Here is a picture of the current state of the cad model, I have gotten a few more parts in place, and it looks pretty good!

There are still some parts that I am missing to finish the model;

*Gear lever shaft (321950)
*Raccordo (321731)
*Starter motor (328677) A defective unit will be perfect for me
*Starter motor holder/bracket (324718)
*Oil drain plug (328430)
*Oil Level Indicator (321838)


If anyone has any of these parts that you want to sell (also defective parts are of interest), let me know, thanks!

[yumax]

Hi Duranti
I'll try to translate what are you looking for in easy way for all friends.

*Gear lever shaft (321950) Asta comando cambio, quella che esce dal carter su cui viene fissata la pedivella del cambio particolare n° 15 del disegno qui stotto.

[attach=1]

*Raccordo (321731) Raccordo devio acqua particolare n°21 del disegno qui sotto

[attach=2]

*Starter motor (328677) A defective unit will be perfect for me Motorino di avviamento completo particolare n°2 del disegno qui sotto

[attach=3]

*Starter motor holder/bracket (324718) Non sono sicuro dovrebbe trattarsi dello scatolotto di attacco del motorino di avviamento versione frizionato particolare n°5 qui sotto

[attach=4]

*Oil drain plug (328430) Cartuccia filtro olio interna, particolare n°12 del disegno qui sotto

[attach=5]

*Oil Level Indicator (321838) spioncino livello olio particolare n°16 del disegno qui sotto

[attach=6]

Cross the finger Duranti may be someone could help you easily than before.

I have the little window 321838 but I have it far away from my home and I don't know when I can go there to pick up it.

It depend about your patient.

[Matte]

Hi Duranti, the UNI ISO 4156 should be the correct standard for the serrated spline

[Duranti]

Hi Duranti
I'll try to translate what are you looking for in easy way for all friends.

yumax, thank you very much, I appreciate it!!! 

[Duranti]

Hi Duranti, the UNI ISO 4156 should be the correct standard for the serrated spline

Matte, thank you very much for your investigation, I appreciate it!!! 

I will grab something to drink, and dive into investigating further, I think we are closing in on the correct standard and sub-category! 

[Matte]

It's a pleasure, Duranti, it's a pleasure

[Duranti]

The work continues, this time it's work on the intake, as well as sprocket assembly. 

I finally got hold of a set of carburetors, as well as an intake manifold (many thanks to Bob).
I'm scanning the carburetors seperately, right now, to achieve the best possible detailing, it takes more time, but the carbs are an important part of the engine, so it's worth the effort!

Also I'm working on a rotating sprocket assembly, using bearing to add to the realism. 
I had to replace the spline on the shaft/sprocket because the resolution is too fine to achieve on the printer, as can be seen in the picture.

Lately I have also been working on a 1:1 scale manifold to replace the original Nordwest 600 part, I will come back to this at a later date.