21 May 2013

making stand and attaching stay for dynamo and adjusting BB

I started making stand. 2 rectangular tubes are prepared from 1 m one, the measurements are 10 x 25 x 300 mm.
At 120 mm from the edge, The incision was made. The making way is same with front part. Then welded.
 The width of paralle part is 44 mm. The center rectangular tube's width is 40 mm. The thickness of washers is added.
M8 screw is used for this stand. at first with 6 mm diameter drilled, then with round file, it widen to 8 mm adjusting the position.

I attached a stay for dynamo. Now we can use nickel hydrogen battery for LED. However I want to use old way.
checking the position.

I adjusted Bottom Brancket.
It looks too hard. But when I ride on my python, my weight add to the part and the movement changes. So it's good, I think.