Slowing Down Tsunami Decoder on speed step 1

[HurricaneFec]

I got my hands a Tsunami Decoder and I'm trying to slow it down on speed step1 to consist with my Loksound Decoders but for the life of me I cant get it to slow, any suggestion for the CV's. I'm using JMRI software

[Mark R.]

CV2 controls the start voltage. Start with CV2 set to 0. If the engine doesn't just begin to crawl on speed step one, keep increasing the value in CV2 until you just get some movement.

That being said, getting a Tsunami to match a Loksound isn't going to be perfect as the Loksound is noted for superior motor control. When I have to speed match Tsunami decoders to Loksound decoders, I get the Tsunami working as well as I can, then "de-tune" the Loksound to match. You will also find it to be easier to match the two if you turn the BEMF OFF on the Loksound decoder.

Mark.

[Mark R.]

Speed matching two engines isn't a two minute job, and certainly not with two different decoders. You basically have to fiddle with five different CV's in order to get them to play identically ....

CV2 - Start Voltage
CV3 - Acceleration
CV4 - Decelleration
CV5 - Mid Speed (if equipped)
CV6 - Top Speed

The first thing you should do, is turn the BEMF off in the Loksound decoder (set CV49 to 18). Starting with CV2, get both engines running the same speed in speed step 1. Repeat this process with CV5 and your throttle set to half speed. Lastly, set the top speed of both using CV6. I accomplish this easily by setting both engines to the same address and running them side-by-side on two parallel tracks.

Now, with both engines running in speed step 1 (they should be the same now), quick advance the throttle to mid way and observe the acceration of the two engines. If one accerated to mid speed faster than the other, you want to slow it down by increasing the value in CV3. Keep adjusting until both engines accerate to and maintain mid-speed. Now observe the same thing as you quickly turn the throttle off. If one engine slows to a stop faster than the other, increase the value in CV4 and try again.

I do these kind of speed matching games on a regular basis and it can easily take an hour or more to get two engines perfectly matched.

Mark.

[HurricaneFec]

Thanks to all who replied

[rockisland652]

Try this procedure. It works.


tonystrains.com/soundtraxx-low-speed-tuning-march-24-2012/