PS3 running slowly

How much voltage is measured at the rails with the draw while running?

Seems like you have a power issue. Don't know why only on PS3 unless there's some other anomaly caused by the controller.

Can you remove the powermaster for a test.

Were these engines bought used? (Did someone set them up under DCS?)

Have you tried resetting them?

I checked the voltage - 17.5 volts on both loops.  I changed the speed steps to 200.  Seemed to help a little.

One engine used - two are new.  All same issue.  I have an old PS1 engine that runs fine on one of the loops.

I am not sure how to test the powermaster.  I could measure the input voltage to the powermaster.

Since I don't have DCS I can't do a true reset. One of the engines is Atlas. I sent it back to them because it had other issues.  They did a reset on it when they had it.

The other thing you can  do is turn off speed control in the PS3 engine- yes in conventional, yes, with a powermaster, yes using horn and bell commands.

The idea is that even in conventional. PS3 is measuring the input voltage- making that an input for speed-  but key here is headroom voltage. In order to regulate speed constantly under varying load- you need voltage headroom for the controller inside PS3 to give the motor more oomph to hit the target speed and maintain. So a given voltage input is treated like a slightly lower speed to give this room. When you turn off speed control now it's just straight voltage directly to the motor- no more feedback rpm interaction. Again, speed control on, engine runs slower at a given input voltage. Speed control off- engine now runs faster at a lower voltage compared to speed control enabled.

We do this same thing on Locosound engines for the same reasons.

PS3 instructions

Locosound for the same reasons

Loco-Sound Operating Instructions
Speed Control
M.T.H. engines equipped with Loco-Sound have speed control capabilities that
allow the engine to maintain a constant speed up and down grades and around
curves, much like an automobile cruise control. You can add or drop cars on the
run, and the engine will maintain the speed you set.
While the engine is programmed to start with the speed control feature activated,
you can opt to turn it off. This means the engine's speed will fall as it labors up a
hill and increase as it travels downward. It is also affected by the addition or
releasing of cars while on the run. To maintain a constant speed when speed
control is turned off, you need to adjust track voltage yourself.
To turn speed control on and off, put the engine in neutral, then quickly tap the
transformer's Whistle button one time then quickly tap the Bell button two times,
allowing approximately ½ second to lapse between each quick button press. Repeat
the 1 whistle, 2 bells code to return it to the other condition. You will want to do
this during the initial neutral upon start-up if you ever couple this engine to
another engine that is not equipped with speed control to avoid damaging
the motors in either engine. Each time you shut down the engine completely, it
will automatically turn speed control on.

Doug, I run my PS3 engines in conventional with a ZWL.  The horn and bell commands don’t function with the ZWL.  The commands did work with my postwar ZW and sound activation buttons.  You may run into the same problem with both your Lionel power sources.

My MTH engines with PS3 run as fast as I want.  I have two engines, however, that were converted to PS3 - one Atlas, one K-line - that run on the slow side.  I wonder if that happens because the gear ratios aren’t optimized for the MTH operating system.

I think your best bet would be to bring your engine to a person with a DCS equipped layout to reset features per Vernon’s advice.

John

@DougC posted:

I changed the speed steps to 200.  Seemed to help a little.

What does this mean? on the Lionel control?

I am left with more questions. I really don't know what is going on here.

Are you running DCC?

Are you comparing the top speed to any other command control engines with sound?

or just the PS1 engine?

Just how slow are we talking?

I will try disabling speed control.  Is there anyway to tell if I turned it off?

You can change the speed steps with the L, M, H buttons at the bottom of a CAB-1L. 

I am only using TMCC and Legacy - no DCS or DCC.

It is hard to do an exact speed comparison.  When I run a Lionel engine, I don't run it at full speed because I think it is too fast.  Maybe at 80 to 85 percent of full speed.  Running one of the PS3 engines, I want it to go maybe 15 to 20 percent faster.

i found this post

https://ogrforum.com/topic/con...nd-the-legacy-cab-1l