If you look at
these controller's you will see the pots in green, white or red as has been said only adjust in small increments until slide moves up ramp easily should not need much of a increase.
Yes with power to shoe line or Gen running is always the way to move slides your converter is supplying the good 12v needed.
All the links below in my signature links work QT's 1 & 2 is where this link came from in slide section.
I have added that link in the
slide info link.