Greetings,
I'm a good physician, but lacks many knowledge in electronics... I need to supply a servo driver with a +-18V (to +-30V) power supply.
I got a
FI 1333 power supply for this task than has a mass, a - and a + output and delivers voltage from 0 to 30V.
But when I look at its output on my oscilloscope, connecting one wire on mass/ground and the other on
+ I don't see a continuous +voltage that i can shift but a sinusoidal oscillation. Same goes for mass and -. I only see a continuous voltage when i measure between - and +, excluding the mass.
I'd assume my servo needed -18V on one pin and +18V on the other, so a differential of 36V at least, and my power supply doesn't provide it. So do I need a ~40V power supply ? Or is my power supply enough and I just don't understand something ?
Why is the voltage indicated on the power supply not the voltage between the mass and + but the one between - and + ? If I set my power supply to 30V and connect the -, the mass, and the + to my driver will it be powered with +-15V or +-30V ?
Many thanks for your help
Adrien