To add to Paul's explanation, it all comes down to a "make before break" problem! If the polarity changes with a slow motion switch machine it's possible to have a short to occur for a fraction of a second thus shutting down the DCC system for a second or two. I had this happen with a Shinahara turnout powered by a PFM slow motion machine. I removed the plastic crossbar with it built-in contacts and everything is fine.
Bob Werre BobWphoto.com Paul Vaughn wrote: > > > There is no such thing as "DCC friendly"!!!!!! It is a ploy from HO & > On30 manufactures to sell new products. A switch has two running > rails, two closure rails, two points(non stub), two guard rails and a > frog. In DC or DCC the frog needs to be isolated from the rest of the > rails electrically, because it needs to change polarity. > > The reason as far as I can tell was to hide the fact that their > products were not made correctly in the first place. So their new > products came closer to being correct, thus generating the buzz word > 'DCC friendly' to sell the new products. > > Electrically there are no differences in the requirments! > > Paul > > On Mon, 8/2/10, shabbona_rr <[email protected] > <mailto:user141771%40q.com>> wrote: > > What are you talking about, "DCC-friendly"? > "S"tring Bob > > ... but we don't have a DCC-friendly track system comparable to Atlas > HO, which is bound to be a big stumbling block for those wanting to > move up to S. > > Charles Weston > > > > ,_._,___ [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/
