Subscriber & Member Login

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

two motors one decoder

853 views
9 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    April, 2017
  • 80 posts
two motors one decoder
Posted by graymatter on Friday, October 06, 2017 6:40 PM

Have a cow and calf each with a motor. I would like to use one decoder for both.

I measured the stall current and found a decoder that can handle the combined current draw of both motors.

Before I took the plunge I wanted to ask if anyone has used one decoder for two motors and if they were satified with the slow speed performance.

I am assuming that I would hook the motors in parallel.

But I thought it would be easier on the decoder if the motors were wired in series. Maybe adjusting the start voltage CV would make this the best way to use the decoder.

Moderator
  • Member since
    June, 2003
  • From: Northeast OH
  • 13,719 posts
Posted by tstage on Friday, October 06, 2017 7:06 PM

Is it lack of room in the calf the reason you are trying to go with only one decoder?

Tom

http://www.newyorkcentralmodeling.com

Time...It marches on...without ever turning around to see if anyone is even keeping in step.

  • Member since
    April, 2017
  • 80 posts
Posted by graymatter on Friday, October 06, 2017 7:18 PM

Right Tom. There isn't enough room in the calf.

  • Member since
    January, 2009
  • 2,325 posts
Posted by RR_Mel on Friday, October 06, 2017 7:31 PM

I have used two motors on one decoder in several locomotives.  I remotored three of my Rivarossi articulated locomotives to dual Canon EN-22 can motors.  I paralleled the two Canons on one MRC 1731 decoder.  I added 10 ounces of weight the Rivarossi boilers and all three locomotives perform perfect.  The Twin Canon EN-22 motors work great in parallel.  Both EN-22 motors will draw close to one amp under a heavy load.  I have never had a decoder fail!
 
   
The link above was a post in 2014 before I installed a MRC1731 decoder in the tenders.  I bought my first MRC 1731 decoders in 2016 and they work great in my dual motor articulateds.
 
Mel
 
Modeling the early to mid 1950s SP in HO scale since 1951
 
My Model Railroad   
 
Bakersfield, California
 
I'm beginning to realize that aging is not for wimps.
 
 
  • Member since
    October, 2006
  • From: Western, MA
  • 7,412 posts
Posted by richg1998 on Saturday, October 07, 2017 7:52 AM

For a few years I ran an HO F3 A/B with one decoder. Used the B for pickups also. Speaker in A and B.

I also ran them with a F7, A/B and each had a decoder and speaker. Ran both sets in ABBA. Not a big deal. Little bit of fine tuning.

Had to lower the sound quite a lot.

Rich

N

  • Member since
    April, 2017
  • 80 posts
Posted by graymatter on Saturday, October 07, 2017 2:07 PM

Did the F3A and F3B both have a motor?

If so did you wire the motors in series or paralelle ?

  • Member since
    October, 2006
  • From: Western, MA
  • 7,412 posts
Posted by richg1998 on Sunday, October 08, 2017 2:06 PM

Motor in both. Six pin small inline plug assembly in the Diaphragms and pretty much out of view, depends on radius of track. Close coupled A and B. Pretty sure motors in series. Been some years.

A few years before, I had a two motor HO Bachmann 44 tonner converted to DCC with a LokSound v3.5 decoder and ran them in series. I believe those locos had a twenty mph limit. Worked quite nice until a gear cracked.

Rich

N

  • Member since
    September, 2014
  • From: 10,578’ (3,224 m)
  • 702 posts
Posted by jjdamnit on Sunday, October 08, 2017 2:31 PM

Hello all,

Which calf unit?

I have a SW-1500 in HO with a calf.

Decoders were successfully installed in both and run MU’ed.

Perhaps modifying the calf’s frame by milling out a pocket for the decoder is the answer.

Hope this helps.

"Uhh...I didn’t know it was 'impossible' I just made it work...sorry"

  • Member since
    October, 2006
  • From: Western, MA
  • 7,412 posts
Posted by richg1998 on Sunday, October 08, 2017 2:42 PM

There are some small decoders.

A few years ago I used a DZ125, not much larger than a USA dime. I think that one has been upgraded to a DZ126. They are for Z, N and HO decoders good for one amp.

TCS has some small decoders also.

Rich

N

  • Member since
    December, 2004
  • From: Bedford, MA, USA
  • 17,384 posts
Posted by MisterBeasley on Thursday, October 12, 2017 6:07 PM

One thing you can not do with one decoder is speed-match the engines using DCC CVs.  If they run well enough together, then you're good.

It takes an iron man to play with a toy iron horse. 

Subscriber & Member Login

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!
Popular on ModelRailroader.com
Model Railroader Newsletter See all
Sign up for our FREE e-newsletter and get model railroad news in your inbox!
ADVERTISEMENT
ADVERTISEMENT

Search the Community

Users Online

ADVERTISEMENT
Find us on Facebook