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 Traintrackr® Underground Overlay |
Phil and Lin Spiegelhalter
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Click here for 
Solent G-Scale Group |
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Traintrackr® Underground Overlay |
Phil and Lin Spiegelhalter
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Click here for
Solent G-Scale Group |
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| Or Click for: |
| G Scale Garden Layout |
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| G Scale Portable Layouts (mostly seen at Hollycombe) |
| and a |
| Double-deck portable Scandinavian H0 Layout |
Beechingless was first started, in 1976, as an 'analogue' CAB Controlled layout using 'Isolation Shift' (see below)  Digitol Gemini Mk4 Pulse Width Modulation Controller with Inertia and Brake Simulation (16Vac 50Hz based)  |
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Back in the mid-70's I designed a simple 'Isolation-Shift' CAB control system in which POWER was applied to the 'Token Block' Sections between stations using mechanically-interlocked 'RADIO BAND' switches for each section: any of the controllers could control one or more sections: Pressing the controller's button for a section gave it the Token (and power) and simultaneously released any other controller from that section. [In 'those days' analogue radios had Band Select Switches for LW, MW, SW [ and then FM ] The terminolgy is still used for Software Buttons with '1 of many' selection. Click here for a fuller explanation with more drawings about 'Isolation-Shift'. |
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 More on Zero-1 will be linked from here later Meanwhile, here is a Wiki Link to a US-based summary of zero-1 as a part of the History of Digital Command Control systems |
 A Selection of our Early DCC Controllers from... Massoth Dimax Navigator handset = Cabled or 2-way wireless, with images of locos. Controls 2 locos and Accessories ZTC 411 'Console' style Central Controller - Analogue, Zero-1 and NMRA DCC modes ZTC handheld (cabled) controller - 2-digit display and 4 buttons restricting ease of use Expressnet communications adapter ( Din, Mini-din and RG plags used by different manufacturers ) DECT Phone - used via a Lenz adapter provided an early wireless handset Roco/Fleischmann/Z21 Multimaus - (Red or grey = cabled, blue = Zigbee and now Black Z21 wireless LAN) Loco, Accessories and Graphic displays Now with Smartphones, Android and iOS tablets offering loco and accessory controls with illustrated displays With wireless handsets we can operate our layouts when standing behind visitors watching the layout, and also encourage operation by them: aided by the intuitive and easy to hold Multimaus, and a Joystick-controlled Crane for shunting and loading / unloading wagons. Even if not using DCC for loco control: using the 2-wire bus for controlling all the accessories makes wiring much simpler and especially makes any future changes easier to implement than 'traditional one-to-one wiring from a central control panel'. With modular-layouts using the dcc bus for accessories greatly simplifies the inter-board wiring! [ We use Track dcc, Accessory DCC, 12Vdc and historically 16Vac ] Accessory decoders are available with outputs for 1,2,4,8 or 16 devices to help keep wiring simple and local; and nowadays, many items like TrainTech Colour Light signals are fully DCC integrated ... When combined with other developments for controllers to have a wireless remote throttle can offer much of the flexibility of going fully digital. New options also include Hornby's 6000 and 7000 series with Bluetooth. A Link to our Modular G Scale Layouts - also check out the Solent G-Scale pages or via the G Scale Logo top right. |
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Maximising Continuous Running of Multiple Trains Five or more trains can be running continuously with others operated on a shuttle basis: Upper, Middle and Lower level Standard Gauge loops shown, with Narrow gauge on the upper level and 2 trains in the 'sink hole' within the helix. A 'Swiss Incursion' of H0m shuttles up to the 4th level, and H0f in the Quarry. [Until about 1973, half of Swedish railways were narrow gauge] Each level is fed via a PSX intelligent circuit breaker - coping with start-up surges and attempting automatic resets every 2 seconds after a fault. The 'Test'/Tourist loop in the 'Sink Hole - which can be driven by visitors - is normally operated from a separate DCC system; allowing reprogramming or testing during a show without stopping the main DCC layout. Clockwise or Anticlockwise Trains can change level without hindrance by using the helix, and then exit in either direction via the triangular junctions The dcc phase ( called 'polarity' by some, as if it was dc! ) of the middle level and helix is 'fixed', but the phases of the Upper and Lower levels depend on their 'exit' point settings ( 35a+c on the upper level and 29abc on the lower level ) With the points located on the Helix module, but the power distribution on a different board; a DCC-controlled relays provide the required route-based phase switching; avoiding reliance on Auto-reversers and short-circuits triggers as well as offering 'unlimited' lengths of train. [ 4 dcc busses are distributed to all modules: Upper, Lower, Middle-Helix and Accessory Bus with 12Vdc and [historically] 16Vac. The longest operable train is a 3.5metre LKAB Iron Ore Train limited by the length of its hidden siding, and not the size of the helix. Similarly, while the Test Loop is normally independently powered, the 'Test Loop Access Points' [30ab] have a relay 30c which swaps the source of power to the loop - allowing trains to be driven on/off to the main layout. Link to 'Skandi Demo' and Skandi2: Somewhere in Scandinavia' |
