Trim Adjust

Decoder Features

Movement & speed Back EMF Decoder-Assisted Consisting Dither High Frequency Kick Start Loco Momentum Loco Trim Loco Momentum MU consisting Speed Steps Speed Table Switching Speed Three Step Speed Table Forward/Reverse Trim Vstart Vmid Vhigh Programming Addressing CV Reset Programming Programming Lock User Identifier Lighting & Effects Directional Lights Func Remap FX Lighting Master Switch Misc Short-Circuit Thermal Protection Transponding

DCC Core components

Intro Booster Command station Decoder Power supply Throttle

Track work components

Track wiring Track work

Trim Adjust is the feature incorporated into the multifunction decoder by CVs 66 and 95.

These Configuration Variables are Optional, so your decoder may not include them.

Why the Need for Trim Adjust

Due to tolerances in the gear trains and bearings, a vehicle may not operate at the same speed in both directions with the same throttle setting. Trim Adjust allows user adjustments to the voltage supplied to the motor in forward or reverse rotation. This allows the motor (and vehicle) speed to be altered in either direction to make them match.

Forward Trim

Forward Trim specifies a scaling factor to be applied to the calculation of the motor drive voltage when the locomotive is operated in forward. It is interpreted as n/128. Setting CV 66 to Zero disables the feature.

Reverse Trim

Reverse Trim specifies a scaling factor to be applied to the calculation of the motor drive voltage when the locomotive is operated in reverse. It is interpreted as n/128. Setting CV 95 to Zero disables the feature.