Looking to DCC my little MU2 switcher and it's not happy, no light. Using a cheapy Digitrax DH126. Might swap out the decoder for another DH126 on another loco just to check that it's not the decoder. Need to triple check the wiring, but things look OK. Has anyone DCC'd anything MU2 powered? It may just be oxidized wheels even though they look clean.
I'll snap pics tonight for the red and black wiring for power pickup.
Did you perform a stall test first? If you did what reading did you come up with?
I believe the 126 is a 1.25 amp decoder.
You say there is no light. Is that the only problem?
The problem as I see it; trying to DCC an MU-2 will be difficult because you MUST totally isolate the motor from track power. With an MU-2 getting power through the same metal motor case as the wheels/pickups run through I think you will have trouble.
It seems the only way to do this would be to insulate the motor truck from the rail and use the other truck with different axles to be able to use wheel wipers to pick up both rails.
Doing that would then cause intermittent pick up for sure.
Last Edit: May 17, 2019 8:30:13 GMT -5 by rbturner
Randy; operating the Vicksburg & Eastern Railroad.
You say switcher. Is this a 2 truck loco or a centrally mounted MU-2?
If you keep in mind that the motor MUST be totally isolated from track power while doing the install it is actually pretty simple.
2 wire in to the decoder and 2 wires out to the motor.
Once that is done I usually sit it on the programming track and do a address read back. If your work is OK then you'll get a read back. If not, you won't. Doing this simple test on the programming track can save you the cost of smoking a decoder by testing on the main.
Generally, there isn't enough power available on the programming track to burn up anything.
Last Edit: May 17, 2019 8:57:14 GMT -5 by rbturner
Randy; operating the Vicksburg & Eastern Railroad.
Post by NickelPlate on May 17, 2019 9:35:53 GMT -5
To isolate the motor on an MU-2 all you have to do is slip an insulator over the brush spring on the grounded side, then solder one of the motor control wires to the brush itself. You could also cut through the brass lug on the brush mounting plate that grounds the brush to the frame. The screw that holds the brush plate is a good spot to secure one of the track power wires for the decoder; the other goes to the wires from the pickup wipers.
frankenstein: I'm currently a chair dweller right now.
Aug 5, 2019 10:05:24 GMT -5
rbturner: Sitting still is the pits. Unless it's at your train room work bench.
Aug 5, 2019 13:06:57 GMT -5
ZeldaTheSwordsman: rbturner, to answer your question from two weeks ago, my livery plan is actually to paint it up as another of my "Strawberry Specials"
Aug 5, 2019 14:33:12 GMT -5
JNXT 7707: What is a "Strawberry Special", Z?
Aug 5, 2019 20:31:39 GMT -5
ZeldaTheSwordsman: Here's a hint: You've seen two or three of them from me already
Aug 6, 2019 0:23:46 GMT -5
ZeldaTheSwordsman: I could use some feedback on the cobblestones of my level crossing. It's one of those things where lack of input is gonna stall me x.x
Aug 6, 2019 0:40:24 GMT -5
rbturner: Many years ago I built a Budweiser Clydesdale, 8 horse hit w/ wagon. It sat on a cobblestone base. I painted each cobblestone individually with various earth tone colors. It looked great but was a real job.
Aug 6, 2019 8:01:21 GMT -5
frankenstein: Why get stalled? Things like that have a great variation to them, and are largely interpretive.
Aug 6, 2019 11:14:28 GMT -5
ZeldaTheSwordsman: Because I needed to be sure the cobblestones weren't completely off the wall before proceeding to the weathering stage of painting the base. I know there's a lot of variation, but I was worried I had still managed to goof it up
Aug 6, 2019 13:12:21 GMT -5
methuener: My B&O Pratt Street layout will be all street running and all cobblestones. I'm going with paper sheets with cobblestones printed from photo images.
Aug 8, 2019 19:49:10 GMT -5
eilif: Is there a topic where we share our collection of rolling stock from other member's freelanced railroads? I've got a BC&E on the way that will join equipment from JNXT, NMN, and JFI, it'd be nice to have a specific place to share this stuff.
Aug 12, 2019 8:29:48 GMT -5
JNXT 7707: I don't think there is one, or a specific place for that - but just create one under "Gone to Beans Coffee Shop" I'd say. Sounds like it could be fun!
Aug 12, 2019 8:42:50 GMT -5
JNXT 7707: I've also acquired a small handful of mystery freelance roads from train shows, done with such care that I can't think of stripping them.
Aug 12, 2019 14:38:46 GMT -5
John: JNXT, Don't want the cars but would like to see the pictures. Please!
Aug 15, 2019 14:37:39 GMT -5
John: I guess I will never understand the romantic nostalgia that is felt about Woodstock. I grew up in that era. Woodstock seemed more like a Drunken Roman Orgy than a music festival. I guess I was a Red Neck then too.
Aug 15, 2019 20:45:33 GMT -5
rbturner: John; AMEN.
Aug 16, 2019 12:06:03 GMT -5
JNXT 7707: I second that. I do like some of the music but the event itself was a disaster. It has improved over the years though, like a fine hippie wine
Aug 16, 2019 13:48:33 GMT -5
The Jade Fog, formerly: Dave: Just heard Canned Heat for the first time. Sounds like pretty good blues work. The Dead are on in a few hours!
Aug 16, 2019 19:58:56 GMT -5