I purchased Tom's (win32forth) XB-600 with a 72V controller and the extra battery.
It ran well for quite a while (several weeks) but blew up today Badly.
How it blew up was at a stall ( small 1.5 inch incline into my garage ) and I applied a small amount of power to get into the garage.
What happend next should make a number of us think about our setups.
The first thing was that the 30A fuse blew. But this fuse was not rated for the voltage involved.
In general the blade fuses you find are for automotive 12V systems. When my fuse blew, it arc welded its way to a fuse holder melt down.
That apparently caused the controller to blow.
I was lucky that the arc only lasted about 200ms because with the voltage involved and the tiny wiring, I could have had a great roasting of my butt on the scooter.
I will be doing some investigating of fuse holders that will take the current and voltage that the machine is dealing with. I may be changing some FETs in the contorller soon also. Maybe 100 V FETs are not enough for the long term operation with 72 Volts.
I am very handy with soldering iron etc. so that should not be too big a problem.
So a couple of questions.
1. Anybody else have this problem? If so what was done..
2. I saw a nice picture of the controller wiring somewhere and cannot seem to find it now. Anyone remember where??