Hi
I have a previous thread which I will update shortly

I have constructed a desktop CNC

I have a power supply with chinese characters above the 2 terminals
I need to connect it to the spindle which has 2 wires black and red
Wires from the power supply has a foil sheath.

1. Will I do damage if I connect the wrong way around?
2. How can I check which way to wire spindle. (black and red)
3. Power supply is connected and has power
4. Is it a good idea to earth spindle body?

Many thanks

DaveZ