碰到困难的地方是 ,因为prototype 是轻的 ,放置在桌面上 会倒下来
The trouble I met is because the prototype is light and it will be up side down when put it on the desk top.
加齿轮上去 固定之後 ,再使用胶带固定住,增加重量,
It will not be upside down by increasing the weight after adding the toothed gear to be fixed as well as the strap to be fixed.
传输带(小橡皮筋)会和上面的齿轮 卡住,导至於滚)轴无法转动
The transmission band will be locked(fixed) with the upper toothed gear that can lead to be not running.
把传输带(小橡皮筋)和上面的齿轮 隔一些距离 比较不会卡住
The transmission band will not be locked(fixed) with the upper toothed gear if they have gap.