Hi,

first Question what Steering Controller are we talking about?

Rail Guidance => Little Black Box called ESL1/80V

or

Wire Guidance => There were 2 Controllers => PHB Noell II oder PHB Noell V

When you have an Rail Guidance Truck you can Set the Pot like you wrote => Turn the Traction whell to ca. middle and then set the pot to half of its resistance.

If you have Wire Guidance then there are more things to do. So reply what Steering you have and i will help you.

Mfg

Sven