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Nigelcliffe

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  1. Suggest you sort out the BM1 on a bit of test track on the bench before going to the layout. Which Rail to cut ? BM1 instructions say use the "right" rail, but the diagrams above show the left rail approaching the turnout from the frog side. This isn't a huge issue, provided the activation bit in the decoder (CV27) is set correctly. It does matter that you do it consistently around the layout, and that the braking sections are long enough. CV27=1 for right rail, CV27=2 for left rail, CV27=3 for both rails (but with consequence cannot reverse away from stop sec
  2. All ESU function outputs are user-assignable. The function mapping (CV changes) allows just about any conceivable combination of key, direction, movement, etc.. They may have initial values applied to them by the sound project writer. If not set by the sound project writer, the ESU manuals detail the factory initial values. I recommend using a computer device for function mapping changes - either a LokProgrammer or JMRI/DecoderPro connected to a programming track. The number of CVs involved is astronomical (hundreds of them).
  3. CV19=255 is a legitimate consist address (127 in the reverse direction). So, it could have been arrived at by operator error in pressing consist keys on a PowerCab (or other system). - Nigel
  4. Which version of App is being used to talk to Z21 ? (wondering if its the old "colour logo" Z21 App, rather than the new "black logo" App ? ). Or is this problem with the windows tools ? - Nigel
  5. I agree with Andy's comment above on loco wheels, the 2mm shop ones are very expensive for static non-working dioramas. If Mike has a 3D resin printer, then just print the wheels for locos as well. They'll probably have a better appearance than the functional ones the shop stocks (because the functional ones are constrained by the minimum cross-sections for the metal sintering process). Might be worth trying printing centres and pushing them into Association wheel rims (available from shop 3).
  6. Presumably you mean "tried on DC with a DC blanking plug". Because if you tried on DC with the DCC decoder still in place, then its running using the decoder. That said, all the symptoms say "not the decoder".
  7. BM1 needs an "on" contact when the controlled section is "proceed at normal speed", and an "open" connection when the controlled section is "brake to a stop". (BM1 = Lenz Asymmetric DCC braking module ). - Nigel
  8. If swapping decoders results in no change to the problem loco, and the "good" loco works well with either decoder, then the issue looks to be mechanical/electrical in the problem loco. So, start looking for those sort of issues. Obvious ones are: too much gunky grease on gears, drive shafts not correctly coupled from loco to bogie gearing, pickups not aligned correctly on wheels, faulty gears. Less likely, but possible, may be parts on the loco PCB. You could try a warranty return to Bachmann, because a sensible strategy they might take is to swap the mecha
  9. The line diagram on the motor shows the switch arrangement, I'd expect the fat "bar" to correspond with the motor movement left-to-right. From the edge of the motor, the first two contacts are the track feeds, the third is the frog wire. A meter set to resistance or continuity testing should show those changing when the motor moves from one position to the other. Wire colours should be "whatever standard you use on your layout that will be clear to you at a later date". - Nigel
  10. The above will work, but is excessively complex unless it is really important to wait for the point motor to throw half-way before changing the signal. Simplified version, where signal will change as turnout motor switch is changed: Completely Remove the relay and external 12v supply from the diagram. Take wire 6(relay) from signal, connect to wire 1 on Cobalt Take wire 8(relay) from signal, connect to wire 8 on Cobalt. And there are still two un-used change-over contacts on the Cobalt. I've shown two resistors, one to each signa
  11. A few observations. a) a track short circuit should not damage a decoder, or a stay-alive unit. Some (low quality) decoders can reset themselves from the spikes from short-circuits, but the decoder should withstand those. That you appear to have a faulty decoder suggests something else went wrong, possibly a fault present from when the decoder was installed. b) You talk of "separate track and accessory bus" and then "cobalt IP digital". If you are using the "frog" output wire on the IP Digital, then you've cross-connected your track and accessory bus
  12. Welcome to 2mm. I'll assume "early 20th Century" as the early 19th would be horse-drawn tramway if anything at all. Even early 20th C, those prototypes will be really small, which will be challenging to build. Not impossible but its pushing the boundaries. - Nigel
  13. Is adding some electronics acceptable ? If so, pretty simple stuff. For those going from the bottom, various circuits offer a single pulse output from a few components (my antique book on 555 timer circuits will have something). Or if into newer digital electronics, then its pretty simple Arduino stuff - taking the normal change-over switch as inputs, and generating a pulse on the output to a transistor (or similar) and that transistor briefly grounds the Dapol signal, thus changing its aspect. One Arduino (Nano or Uno) has more than enough inputs/outputs to cover
  14. RTFM ? Both decoders mentioned don't play ball in the simple way you're trying to adjust them. The use of CV2,5,6 is optional in the DCC standard, and the makers have chosen to not use them. Soundtraxx MC1 (which is what I think Bachmann badged). Has pre-set speed curves in CV25, or you set the full 28 point speed curve. ESU. Has end points (CV2, CV5), but all intermediate points are set in the 28 point speed curve. Possibly the settings for motor control are meaning the loco is running slower than ideal - there is an "auto-tune" option to set those, or you c
  15. Ebay page says "max switching current 0.25A, max load current of 0.5A". Not suitable for typical model railway track currents.
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