Ballistic Pannier

Hi Pete

Welcome to the Forum

With Bachmann motors there is a capacitor across the motor circuit that drastically Affects the speed curve when using a Quiet Drive decoder. It causes an over-speed problem. It must be removed from the circuit.

There are more details on the TCS website Here

Hope this helps

Regards

Zmil

QUOTE (SRman @ 2 Dec 2008, 16:29) <{POST_SNAPBACK}>Definitely check for, and remove, any capacitors.

Also, try changing the settings

CV5 - 50
CV6 - 28

These will lower the top speed and give a shallower acceleration curve at the lower end.

*** Careful: Not all decoders are the same. ESU has CV5/6 with a range 0 to 64, Most other brands are 0~255.

With 28 speed steps, your controller is simply choosing to jump 4 steps at a time - the decoder is actually always at 128... Adding higher settings to CV3/4 then smooths the jumps, so the ONLY real difference is the distance the knob has to be turned (128 requres more steps, so needs more rotation to full.

Richard

Thanks for the suggestions.
I am now a happy but bemused bunny.
I'm happy because the problem is solved but bemused because I don't understand how!

I took the advice from 34C.
I did a factory reset which created the original starting point i.e. 0 - 60 on step 1.

Then I removed the decoder from the Bachmann and put it in a Hornby Pannier which normally has brilliant speed control - and it still had! Clearly not a decoder problem.

I put the decoder which worked so well in the Hornby in to the Bachmann and got great speed control.

Just to be sure I put the original decoder back in the Bachmann and got 0 - 60 on step 1!
I have switched the decoders around again and now have 2 panniers with great speed control.

I don't understand the physics but now it ain't broke so it don't need fixing.

Thanks again for all your input

Regards
Pete

Going on from this thread a little, I recently purchased the bachman G2 with decoder already instaled, and after going through the running in process, i find that the loco jerks at low speeds, it will not run smoothly, i removed the boiler and applied a few drops of oil in the required places, with no results, but i did notice that there are 2 capacitors fitted? have these been fitted by law? are these causing the jerky movements at slow speed? should i remove them? any comments gratfully recieved.

QUOTE (Thunder @ 4 Dec 2008, 01:43) <{POST_SNAPBACK}>Going on from this thread a little, I recently purchased the bachman G2 with decoder already instaled, and after going through the running in process, i find that the loco jerks at low speeds, it will not run smoothly, i removed the boiler and applied a few drops of oil in the required places, with no results, but i did notice that there are 2 capacitors fitted? have these been fitted by law? are these causing the jerky movements at slow speed? should i remove them? any comments gratfully recieved.

***There are no "Legal" implications from any owner removing the capacitors when installing a decoder. The capacitors are part of a suppression circuit is as Zmil mentioned, but it is only valid under DC running. (as soon as a decoder is added to a DC loco the loco electrical circuit is changed so the overall suppression pattern / capacitors effectiveness changes anyway)

Capacitors can be removed easily with cutters or soldering Iron.

Decoder circuitry has more effect on suppression than was originally in place via the capacitors so they are no longer valid and it will NOT create a problem for interference by removing them, however running quality will be improved.

regards

Richard