THE DIODE MATRIX AND MODEL RAILWAY ROUTING, Part 5 . We now come to the part youve been waiting for – designing the matrix. The matrix boards I am using are designed to go from a single track to a number of destinations, or vice versa. At the present time I am not working with multiple entry and exit routes. However, the principles I have describes will work just as well. Sometimes it is possible that there are two or more possible routes from entry to exit. This is the case at the up (right hand) end of Breitenfurt Ost where for trains from the down main (top right) to Gleis (track) 4. there are two possible entry routes. (See my station plan in Figure 1.) That complexity of point work on the right allows 2 and 3 routes respectively to Gleis 4 and Gleis 3. Similarly, there are two routes each from 2 & 1 to the up main. In practice, I have ignored the secondary routes via Gleis 3, but they are useful if I accidentally mis- route a train and have to get it back to the right track. So, lets look at setting up my down (right to left) routes into the station. To get to Gleis 4 turnouts must be set as follows. T1A: curve, T1B: straight, T1C: straight and T1D: straight. Similarly, to get to Gleis 1 we have T1A:curve, T2A:straight, T2B: curved, T3C:straight, T4C: straight and T4B curved. (Remember, Figure 1 covers two blocks and we are only dealing with the right hand one. Also, I am ignoring Gleis 24 as it is purely decorative.) The next thing to do is to generate a table similar to Figure 5.2 or Figure 5.3. Its up to you; 5.2 is easier, but 5.3 is nearer to the physical layout of the matrix board. [Note. The characters under the turnout numbers are an old notation. So, 1=straight and 2-= curved. N= normal and X=crossover etc. There may be some errors as this matrix has not been verified as the diodes were all in the main wiring loom when it was drawn.] . There will be one more update. Any questions, dont hesitate to ask.
Posted on: Sun, 26 Oct 2014 12:29:26 +0000
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