My son and I have a DC layout and recently purchased a Bachmann loco that was DCC equippped and compatible with conventional DC powered layouts.  I did not see anything on the instructions regarding steps to take to make it DC compatible.  It runs but is not smooth at low speeds and actually requires a relatively high voltage (over 6 volts) to get it moving.  We also have an Athrean and a Kato locos that operate very smoothly and are much more responsive at lower voltages.  Is there anything that I need to do with the DCC connections on the Bachmann loco to make it perform better on the DC layout?