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<p>[quote user="rrinker"]</p> <div class="quote-header"> </div> <blockquote class="quote"> <div class="quote-user">Arto</div> <div class="quote-content"> <p>Another question, related to my Back EMF post.</p> <p>"IF" for instance, I have four "identical" locos (same manufacturer, basically the same models other than road#), all with the same decoders, am I to expect that the same CV settings on each loco will produce the same result? Or do I have to tweak the CV's for each so that the startup & speed match in actual operation?</p> <div style="clear:both;"> </div> <p> </p> </div> </blockquote> <div class="quote-footer"> </div> <p> </p> <p> MAYBE - if the locos are the same brand, same model, and have the same decoder. But even then it's not guaranteed. The manufacturing tolerances for model locos are not all that tight. It's definitely a good starting point for a group of identical models, and in most cases will be close enough, assuming they are all broken in and properly lubricated. If three of them have a 100 hours of run time and the other is fresh out of the box - that new one is going to be stiffer than the ones that have had plenty of run time.</p> <p>                      --Randy</p> <p> </p> <p>[/quote]</p> <p>Furthering Randy's comment,</p> <p>I read a story (cannot remember where) about how manufacturers of locomotives had issues with people putting the incorrect gear ratios into locomotives (basically the person on the assembly line in China reached into the wrong box, or the wrong box of gears was placed in front of that person).   I do not believe this has happened recently, but you may find older locomotives from the same production run that have different gears.  If one runs slower on DC, this could be your issue.</p>
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