Cruise-M still not working as it should...can’t stop the full speed runaway

I had a similar issue with the same board.  Mine turned out to be  faulty board.  

Did you remove the ground from the long connector (pin 10) on the cruise m? If you leave that connected it can cause a loss of control and a fried board. It talks about it on page 12 of the instructions.

Do you mean the soldered in cab lights?  I don’t see any reference to a ground on page 12..,

Try pulling the sound card and see if that allows it to run normally.  If so, the CC-M is loading the serial data too much.

https://ogrforum.com/...n-issues-help-wanted

I read also the above thread, with great interest, where John Jakoby added the the sound serial line by snipping pin #24 on the R2LC.  He ran the serial wire from pin 1 on the ccm to one tab created on R2LC’s #24, and pin two on the J4 plug for Railsounds to the other pin created by the snip.  This forced all serial data to travel through the ccm & solved his problem, if I’m reading it correctly. 

Im going to run up & try it without the sound board now John. 

Tom

FlyPlanes-PlayTrains posted:

Do you mean the soldered in cab lights?  I don’t see any reference to a ground on page 12..,

 Guess my page 12 was different.

SPFord27 posted:

FlyPlanes-PlayTrains posted:

Do you mean the soldered in cab lights?  I don’t see any reference to a ground on page 12..,

 Guess my page 12 was different.

My loco is non odyssey, and didn’t have anything plugged into the original 10 pin connector...

Tom

The standard CC-M buffers the serial data, that's what he was doing.  If you buy the diesel/Odyssey version, it has duty cycle for the diesel rev coming out of pin 2 and this trick doesn't work.

You can also add a buffer to the serial data to that the opto-isolator on the CC-M doesn't load the data, that works as well.  I've used this a few times.

gunrunnerjohn posted:

Try pulling the sound card and see if that allows it to run normally.  If so, the CC-M is loading the serial data too much.

Removed this sound card, and no difference.  Rockets away silently.  

Email me and we can discuss exchanging the Cruise M board. Scott sdmann@3rdrail.com

Scott to the rescue.

gunrunnerjohn posted:

The standard CC-M buffers the serial data, that's what he was doing.  If you buy the diesel/Odyssey version, it has duty cycle for the diesel rev coming out of pin 2 and this trick doesn't work.

You can also add a buffer to the serial data to that the opto-isolator on the CC-M doesn't load the data, that works as well.  I've used this a few times.

I can solder, and I can read...But I’m afraid building one of these is beyond my skill set.  After all, a man has to know his limitations.  

I’d certainly try this buffer before hassling Scott for a CCM board exchange, he’s certainly a busy guy & I have the utmost respect for people like him who market AND stand behind products created for such a niche market. 

GRJ do you produce these yourself, or am I going shopping on the All Electronics website & dusting off my old basic electronics book from airframe & powerplant school? 

To recap, it’s a TMCC non odyssey diesel, and the CC-M I purchased is the non odyssey version.  I you think the buffer could help, I’m game. 

Thanks everyone!

Tom

I'd exchange it first, as it may be one that didn't have the right code and causes this issue.  Scott is on top of that issue, let him see if it's a simple board swap.