Trying to get LCRU2 to work

First thing to try is when you address it, see if AUX2 will toggle the headlight on and off.  That will tell you if you're talking to the LCRU2 board or not.

Next time you post, make the diagram large enough to read.

Sorry about the diagram, it looked a bit bigger on my phone, but it looks very tiny now that I'm no the computer.  I was able to verify that the light is toggling on/off with AUX2. 

Its definitely also worth mentioning that the bipolar caps I'm using are actually not.  I'm waiting on my bipolar caps to arrive, so I'm using two 2.2uf 50v  connected at the negative.  Like this
    ---(+ -)--- ---(- +)---
to form a 1.1uf bipolar....
a bit of googling told me this should work.  lol, maybe i shouldn't trust the internet so much. 
https://www.youtube.com/watch?v=aMluEC410eM

The directions for the dual wound pullmors were a bit confusing.  I may try to wire it to a dc can (using the diagram's ive found on this forum for doing so) or a standard pullmor and see if that works.

Here is the excerpt from the original lcru instructions for 2 position eunit pullmors.  Note that this is the document for the lcru and not the lcru2, but my understanding is that the motor wires (green/yellow/blue) wire the same on both??  What confuses me is that this section makes no mention of using the bipolar caps.  I am curious is this is part of my issue...



Engines Equipped With Two Position E-Units

Some of the older, more common Lionel engines, particularly those designated as O-27 types, come equipped with a two position E-unit instead of the more complex three position type. These engines use a double-wound field coil in place of the complicated three position E-unit mechanism to reverse motor direction. Wiring the LCRU to this type of motor is done as follows:

1. Solder the Yellow LCRU lead to one of the motor brush terminals.

2. Solder the Blue lead to the remaining motor brush terminal. LCRU Installation Manual ã Digital Dynamics 8

3. Identify the two field windings on the motor. One of the coils is wound in green colored wire, while the other is an orange color. Select one of the coils, it makes no difference which, and connect it to the GRN LCRU wire. The other coil is not connected and its end should be wrapped with electrical tape.

Quick follow up.  I got it to run with the can motor.  Now just need to figure out whats going on with the pullmor....

Funny side note.... while testing, at one point I entirely forgot to plug the antenna in and the signal still picked up just fine.  Go figure....

Dual wound fields are easy, for connection to the LCRU, just ignore one field, leave it unconnected.  The two field coils should both be grounded to the motor frame on one end.  The field (green) wire connects to the field coil you're using, and the armature connections go to the armature connections.  The caps the way you connected them will work, that's a classic way of making a non-polarized cap out of two.

Did you test the Pulmore by itself?  Wire one brush to one of the field connections, and connect power to the other brush and the frame ground.  If the motor doesn't run that way, fix that first.  Swap the two brush connections to reverse the motor direction and see if that works as well.

Great info, thanks! 

I did isolate the motor and test in both directions and it does work correctly.

So... If I'm understanding correctly, no bipolar capicitors needed on the dual wound pullmor?

I'll wire it up as described above and report back.

You do need the caps, though it'll usually run without them.  They're there to knock down the EMI from the brushes that will affect the TMCC operation.

Gotcha!  Thanks!!

Unfortunately I'm still not able to figure this out on my dual wound pullmor.  The LCRU2 works fine when I set it up to use with a can motor so I have no reason to believe its broken.  It responds to tmcc commands fine.  I have a picture of how i had it wired.  I've foregone the capicitors for the time being until I've got it running correctly.  Foregive the mess as this it my test rig.  Ive rewired it more times than I care to admit.  As it sits it will run in just one direction.  When I change directions the headlight responds, but the motor buzzes a bit louder and tries to run in the same direction as before (and heats up).

Ive got yellow and blue each connected to a brush, green to the center terminal.  I have the gold/orange winding grounded on one end.  I believe I tried to ground the green winding on each end but neither worked successfully.  Any ideas would be greatly appreciated!