Free At Last Posted October 26, 2020 Share Posted October 26, 2020 1 hour ago, cctransuk said: Please do contradict / debate this theory at will - as I'd like to put it into practice if viable. Regards, John Isherwood. Explained here better than I can... Link to post Share on other sites More sharing options...
RMweb Premium John Isherwood Posted October 26, 2020 RMweb Premium Share Posted October 26, 2020 14 minutes ago, Free At Last said: Explained here better than I can... Thanks - I'd read that, but not fully understood it! Basically, for a single switch, there are three possible combinations of the two tiebar positions - DOWN : DOWN; UP : DOWN; DOWN : UP. This can't be achieved with a single slide switch; it's not the electrics that cause the problem but the physical constraints of the slide switch. Thanks again, John Isherwood. Link to post Share on other sites More sharing options...
RMweb Gold Roy Langridge Posted November 16, 2020 RMweb Gold Share Posted November 16, 2020 On 26/10/2020 at 14:51, cctransuk said: Thanks - I'd read that, but not fully understood it! Basically, for a single switch, there are three possible combinations of the two tiebar positions - DOWN : DOWN; UP : DOWN; DOWN : UP. This can't be achieved with a single slide switch; it's not the electrics that cause the problem but the physical constraints of the slide switch. Thanks again, John Isherwood. But you can get three position slide switches: https://uk.rs-online.com/web/p/slide-switches/1543597 Roy Link to post Share on other sites More sharing options...
RMweb Premium Izzy Posted November 16, 2020 RMweb Premium Share Posted November 16, 2020 (edited) On 26/10/2020 at 12:43, cctransuk said: Having studied the Peco wiring diagram for their Electrofrog single slip, I can see no problem with both sets of switch rails being thrown by the same mechanical switch / lever / solenoid. However, the LH switch blades' polarity switch changes the polarity of the RH frog, and vice versa. That being the case, and in theory at least, a two pole two way slide switch should be capable of throwing both sets of switch blades mechanically, and changing the polarity of both frogs electrically. Please do contradict / debate this theory at will - as I'd like to put it into practice if viable. Regards, John Isherwood. I can’t see any reason why it wouldn’t work, so long as each frog was electrically isolated from the rest of the pointwork. I don’t know if this applies to these bits of Peco pointwork. A DPDT with each side used separately would do fine. Mechanically moving both blades in unison to the correct tension could be another matter. But here I believe Peco points use over-centre springs so it might not be such an issue. Just to add, and maybe more to the point- ouch - why do you want to drive both sets of blades of a single slip together? There are three different routes requiring the blades to be both set the same, for the curved route, and opposite for each ‘straight’ one. For electrical purposes - powering the frogs - both can’t be set for the straight route at the same time. It will produce, with live frogs, electrical polarity conflict. Izzy Edited November 16, 2020 by Izzy To add a bit Link to post Share on other sites More sharing options...
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