How does this “zero stretching” affect locomotives with out decoders?
When a conventional engine sits still on a DCC layout, you will hear it “sing.” This noise is caused by the signal described above hitting the motor. Once the locomotive is moving, this noise goes away. If the amplitude of the digital signal is greater than the maximum stall rating of the motor, the motor may experience permanent damage. Therefore, it is recommended that you not leave Un-converted locos sitting still on DCC layouts. This precaution will prevent stress to the motors and damage due to excess heat build up. Generally, most common open frame and can motors are not damaged even after extended exposure but it is always best to play it safe.
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