Ron
Is the commander mounted in the engine or tender.
Bill
Bill,
It is in the tender.
Ron,
Try the cap. I don't think the commander is bad or it would do the same thing when the shell was off although its possible. Could it be possible the motor is loose and the initial torque is causing the motor leads to touch the shell? Could you post pictures or a wiring diagram.
Bill
OK, I installed the capacitor and it smoothed it out quite a bit. Still stutters a little on initial throttle up.
Would adding a second capacitor do anything?
I had no idea the cruise commander was so much better. so am ordering one for this loco. It must be this motor that is the problem.
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There are motors that just don't agree with the Cruise Commander or the Mini Commander II, I've encountered a couple of each. I don't know if that is the case here, but it's possible. I'd assume it's possible with the DC commander as well.
John,
I can put in another motor. Pittman OK ?
Most motors work fine, it's just a select few that seem to have issues with the ERR stuff. You may not be down to changing the motor yet, that's a personal judgment.
I know that I tried to put a Cruise Commander into an RMT RDT recently, and it just refused to run properly. It didn't run any better with the MiniCommander 2, but ran fine in conventional mode with a plain electronic E-Unit. I've put Cruise Commanders in a number of Pittman equipped engines, never a problem.
Thank you guys for all the advice. I received a cruise commander and installed it today. The loco smoothed right out. I still have the capacitor on the motor, but will remove it tomorrow.
It's not perfect, but no more yips at slow speeds. I'll probably swap the motor for a pittman sometime. Glad I can move on to some other projects.
Ron
What's "not perfect" about it?
John,
It still has a very very slight hesitancy when starting and running at one or two mph. My third rail Hudson does not. I wanted silky smoothness. I really think you hit the nail on the head pointing out the potential incompatibility of the motor. For now it's ok. I've got so much I need to finish with other projects.
In my former working life I had to multi task to be sucessful, but now with my hobbies I like to start and complete one thing at a time.
I've found that certain motors and gearing make really slow speed running somewhat problematic with the Cruise Commander. Most of the time, they do great at slow speed.
Originally Posted by Ron H:
John,
It still has a very very slight hesitancy when starting and running at one or two mph. My third rail Hudson does not. I wanted silky smoothness. I really think you hit the nail on the head pointing out the potential incompatibility of the motor. For now it's ok. I've got so much I need to finish with other projects.
Remove the capacitor first. It will compromise the slow speed capability of the Cruise M.
Pete
Well, this isn't a Cruise Commander M, but I'd still remove the capacitor. 
Glad to see all ended well. 
