This is the first I have heard of different gear ratios for the AM GP9's. Since I purchased three used DC units with Hi-Rail wheelsets a couple of years ago and simply ordered new scale wheelset replacements which dropped right in (once I got wheelsets with the right style of bearings. I didn't know there were different ones from looking at AM's website), I now have more questions about the gears. Wouldn't changing the worm to get a different ratio also require changing the axle gear as well to match the new worm? Now I'll have to closely inspect all my GP9's to see if any of the gears are different. They all seem to run OK, and any speed difference I had thought was due to different types of motors being used by AM. I seem to recall my first Geep had a motor that was a tiny bit wider than the inside of the body shell, which caused the sides to swell out a bit, so I replaced it with a Sagami flat can motor. My FP7 came from AM with a round Sagami motor, which was not used in later production runs.
Regards, Bill --- In [email protected], Bob Werre <b...@...> wrote: > > Ed, Assuming that you have the scale version of the Am engine with the > normal motor and gears, I would then look to doing a decoder reset. > I've had it happen a couple of times where the engine runs pretty much > full tilt--when reset it's purrs along a switching speeds. > > Bob Werre > BobWphoto.com > > > > Pieter wrote: > > > > > > > First question is how the engine ran on DC before adding the decoder. > > If it ran ok then, the problem is the decoder programing. If it was > > fast under DC, regearing would be the answer. > > > > I can't help on the details of the programing, although look at "speed > > curves" as one potential solution. > > > > Pieter Roos > > > > Sent from my iPhone > > > > Hi, > > > > I have an American Models GP9 (S scale) that runs at seemly close to > > top speed > > > > with the throttle at less than half power. I've tried to adjust > > CV02,CV06 and > > > > CV05 according to the Digitrax manual but I can't slow the engine > > down. As soon > > > > as I open the throttle, the engine starts and speeds up like a toy > > engine as the > > > > throttle increases. Any suggestions on how to change the CVS or > > otherwise slow > > > > this engine down? > > > > Ed Davis > > > > Stockton > > > > > > > > > > > [Non-text portions of this message have been removed] > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
