Reply to "3D Chuff Cam for my J1a (and S1 Duplex 3-29)"

NortonOGR Forum Member

I think part of the reason Lionel went with two lobe cams is many of the TMCC engines relied on puffer units actuated with a lever on the same cam. 4 lobes don’t give enough travel differential. Not sure why they didn’t use 4 lobes on the fan smoke units though. Most of those gave continuous smoke. Easy to upgrade though with a cam. If the cam well is wide enough for two micro switches you only need a full width cam. If only wide enough for one switch then a cam and DPDT relay will give 4 chuffs and puffs. Cost under a buck fifty and a few hours time..

Pete

11/30/219:51 AM

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