Hi all,
Recently I have upgraded a loco with a Glocken motor using a UHL76400 decoder(1A motor current). The loco runs very smooth and quiet...by ITSELF. It just can't pull my desire length of coaches (just 3 passenger coaches). It's obviously lack of po=ulling power. The decoder gets warm when I set it to 80% of full speed (on the 6021).

The former decoder is a delta, which has discret components and does't have such problem

Any comments?

Thanks

Eric

Hi Eric,

What type of lok did you convert ? I found that the different gears play a major role. The gears in different loks have very different transmission rations, and this must fit to the motor characteristics.

Your description sounds as if one of the following things happen (I assume there is no electrical problem in the circuit, and gear and motor are easily running)

1. the transmission ratio in your lok might be too low for the can motor you used. So the motor draws a lot of current, but does not develop much power. Then the lok is also running super fast at 100 % speed, as long as there is train to be pulled. Solution: a motor with different characteristics: higher nominal operation voltage, lower current. Such a motor has a higher rotational moment at a given motor current. Even the can motor of a big boy or GG-1 does not need more than 500 mA under full load.

2. I don't know whether this applies to the Uhlenbrock decoder, but the load stabilization might not be correctly adjusted. If there is a way to reprogram this by changing settings of internal decoder registers (CVs), I would try that.

Hans Martin

P.S.: Give the lok some time to get accustomed to the new motor. Perhaps there is a gear wheel or bearing that needs some "running in".

Ah sorry about the confusion, my poor English, I didn't change the motor, it should read as...
"I have converted a loco, which is already equiped with a glocken motor, from delta to digital by using a regulated decoder UHL76400" ...

OK, it is the King William's loco. It's the same architecture as 33190,37190 & 37192. The original delta performs poorly, you know , sort of go and stop under the 6021, but no problem of pulling the full length of 6 coaches.

The conversion works fine without pulling any coach. Quiet and smooth, excellent low speed performance. But when I attach just 3 coaches to it, it is struggling to move along.

It may be the decoder setting that's not matching the motor. I have good experience with this decoder driving 60901 hi-eff. motor. This is the first time I use it on glocken motor, so I cannot make any reference.

Hope I have clear up the confusion.

Thanks for any comments

Eric

Bell armature motors require specific types of decoders.

Uhlenbrock makes a specific decoder for bell motors, I don't remember now, but I don't think it's that one.

On the other hand, Lokpilots and Loksounds work fine with either bell or conventional motors.

Luis

Just checked the UHL76400 on Uhlenbrock's webpage. They claim that UHL76400 is compatible with coreless (Faulhaber) motors, but I noticed that the tact frequency is "only" 18.75kHz, which might just be too low in this case. I recommend the LokPilot2, which works with 40kHz.

Juha

More thanks my friends...

1) Yes I can put in a LP2 and see what happen, let u know in a day.

2) the 606728 is equivalent to the 60905 except the LED circuit which I should have no problem. 60905 is my last resource.
Don't know why they are priced so differently.

Thanks

Eric



Edit 3 hrs later :

Put in a LP2. not much better, looks like the 60905 is the last bet.

Seems you are right as usual perz, Lokshop lists the 606728 decoder for 85 Euros...