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I just picked up a K-Line E8 AA with TMCC and 4 motors. I had planned to install Cruise in these engines and was surprised to find they only have a single DCDR motor driver and R2LC for all 4 motors. Rather than two Cruise Commanders I was thinking of using two Cruise Ms with the serial data line and motor direction lines paralled driving both Cruise Ms. I am thinking it should work. 

Has anyone found it won't work? So much for my planned 30 minute job as I will have now to fabricate and wire in a new tether for the extra wires.

Pete

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I made that when a couple of diesel upgrades I was working on wouldn't drive the CC-M when the RSC was connected.  That fixed the issue.  The operation is simple, there is minimal load on the input signal, and the output signal mimics it, minus the transistor diode drop.  The RSC has an opto that is driven by the serial data, it loads down the serial data significantly when you connect it.

This allows me to use the cheaper back-EMF cruise from Lionel parts in place of the CC-M.  The new CC-M doesn't exhibit the clock loading sensitivity, but older ones and the Lionel part don't take it well.

Yep, I posted the wrong one.  Interestingly, the confusion comes because I have a couple in my parts box, and they are labeled S00, that's what the Legacy version is labeled in the Lionel parts pictures!  And, the Legacy one I have is also an S00 on the label, but it only works with a Legacy R4LC.

Riddle me this, what is going on?  Who's on first?

Last edited by gunrunnerjohn

Finally had a chance to get back to this project. Just wanted to confirm that a single R2LC does in fact drive two ERR Cruise Ms. I just paralleled the 4 steering wires as well as the serial line from pin 24 on the R2LC. No buffering needed.

I removed the back to back electrolitics that K-Line had placed across the motors in the slave engine figuring they would kill the back emf signal. Otherwise it was fairly straightforward and just required installing a tether with additional wires.

The two engines track each other perfectly.

Now to get to the cosmetic upgrades planned for these E8s.

Pete

Last edited by Norton

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