having said the built went smooth doesnt mean there was no lessons learned... :
- the crankshaft I tried so solder. Stailness steel. I even sand blasted the contact surfaces for better bonding- haha...
But it didnt work with my desparate try with electronic solder and my soldering iron. Even adding extra flux and assisting with one of these 1100°C lighters didnt help (and I thought that thing would do such a great deal of improvement...). I ended up glueing it with epoxy. It worked, but I would certainly not do it again that way... Better use a tight fit and bolt it, if not braze it (HT solder).
- for the bearing posts I didnt bother to set some positioning pins nor did I machine them mounted to the base plate (not even in one fixation!). So mounting the crankshaft with the ball bearings was quite a fiddly thing with locking the individual screws with just the tension it needs. Bot more here, bit less there so the shaft was turning smooth.
- initially I didnt foresee a solid connection between the bearing posts and the plate where the cylinder is mounted. At the first run I learned that there must be quite some force because the plate started to bend and shake during operation. The correction was fairly straight forward. Bolt some beams of the correct lenth between the bearing posts and the cylinder plate- done and working.
Well, and the general craftmanship of this one is rather rough. I works, but it could have been done prettier... I was in a rush, just having bought the lathe and mill, not having all the tools yet, but wanting to get this thing done. I was very lucky that it went that smooth at the end...
Ah- a video:
[ame]http://www.youtube.com/watch?v=7RIQB-bnz4E[/ame]
Cheers, Karsten
