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Michael:
Hello Group:

Background: 

I am building a trolley layout with "live" overhead (positive). The overhead contact wire is 24 gauge phosphorus bronze wire (standard for O scale). Track is Code 100 steel electrically bonded together (negative).

I am using 16 gauge buss with 20 gauge drops. The drops for the overhead are soldered to 1/4" steel rods which hold up the overhead.

I have over 200 feet of rail installed, but only about 20 feet of overhead installed to this point.


Problem:

I have converted 3 trolley cars to RP using the LM2-S module. The cars move about 3 inches, then stop; move 3 inches more than stop; move 3 inches  more than stop etc. Occasionally I receive the fault "low track voltage" but not continuously. The HC-2 shows track voltage at around 13.8 volts. The cars pull less than 1/2 amp. The module always runs cool.

The remaining trolley cars (not yet converted to RP) run flawlessly on DC power.

I want to solve any problems now before I go further with any installation.

Does anyone know what I may be doing incorrectly?

Mike Sullivan

nodcc4me:
A couple questions, Mike.
Are you using a RP power supply?
If you turn off all sounds, do they still stall every few inches?

Michael:
Yes, I have PWR-56. I get the problem whether the sounds or lights are on or off......makes no difference.

nodcc4me:
Do you have another locomotive that you can plug one of the modules into? This would possibly eliminate the trolley itself as the cause of the problem.


On the info screen, does the voltage drop with every stall or does it remain constant?

William Brillinger:
13.8V is low. The PWR-56 should be around 14.5V.
Do you have a meter to check the voltage on the power bus at the PWR-56?

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