@Paul Kallus posted:Test Results:
Slightly faster bipolar: at 16 volts and running at 12 scale mph amperage is between 0.3 and 0.4
Slightly slower bipolar (suspect one): at 16 volts running at 12 scale mph amperage is around 0.7
Thus, it appears something is amiss in the slower one...although after my DCS battery assumptions were wrong, I suppose I need to test a 3rd bipolar to see what it comes in at...because it could be the faster one is not normal...but I doubt it because the slower one continues to exhibit an ever so slight hitch or stutter at slow speeds...barely visible to the naked eye but its there.
FWIW: the suspect bipolar is coming up in conventional upon powering up Z-4000, but then I can address it via DCS remote and "start up."
Should I pull the motors out of the gear box...not an easy job but I can do it if the consensus is to do so...but what should I be checking for? Or, could this be faulty electronics?
I wouldn’t pull anything apart just yet,....can you run the slower one with the shell off and observe the motors?....get it running as slow as it will dare, and see if you notice anything going odd between the motors,.....if you see one of the motors behaving oddly, turn off the power and check that particular truck for binding, or obstructions. Have you looked at the traction tires closely?....is one slightly slipped off acting as an effective brake shoe?...you’re border line a half an amp difference, I don’t know what MTH calls allowable, but I’d be looking for something binding somewheres,.....me, myself & I don’t like to take anything apart till I have a clear path to go down for diagnostics.......it might take a bit to figure it out, but it sounds like you’ve found the why, now you just need find out who’s responsible,....😉
Pat
