Templot Club Archive 2007-2020
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posted: 28 Jan 2015 17:04 from: Robert M Dixon
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Hi, I am new to Templet and this is first posting on the club site. I am building my own track work (Copper clad and FB rail). I wish to model a double junction but cannot get the crossover to curve as I want it. I want the diverging line to curve so that as it leaves the crossover the 'V' widens and the track curves away from the other. Each time I end up with both line curving the same way although on different radii. I think? I want one curving positive and the other negative. I hope this is understandable and thank you for any offers of help. Mike D. |
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posted: 28 Jan 2015 22:22 from: Martin Wynne
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Hi Mike, Welcome to Templot Club.  At present you are creating a double-junction having a regular-type diamond-crossing, where all the radii are the same and in the same direction. For the type of diverging double-junction which you want, you need to create an irregular-type diamond-crossing. There are two ways to do that. Method A. The easy way is to create a curviform ladder: 1. set up the first turnout and change the type of V-crossing to curviform. Adjust the size of the turnout to produce the required branch radius: 2_281652_350000003.png  2. click the option to create a curviform ladder: 2_281652_350000002.png  3. this is the result. Click to create a branch track off the half-diamond: 2_281652_350000001.png  4. create double-track from it. Split off and insert the second turnout. Snake it along (CTRL+F6 mouse action) to align with the branch track. Zoom in for a precise result. 2_281652_350000000.png  You should normally end up with the two turnouts staggered slightly. That's correct geometry and prototypical. It also helps with the point-rodding design for them not to be exactly opposite. Check before you start that you are allowing adequate track spacings for the size of radii. Ask again if any of that is unclear. Method B. you can create an irregular diamond-crossing by directly overlaying the curved tracks. This gives you more control of the different radii if necessary. 1. start with the two lengths of curved plain track crossing over each other, or one curved and one straight length. One should be a background template and the other the control template. 2. click on the background template. 3. on its menu, click peg/align tools > make diamond-crossing at intersection menu item. 4. follow the instructions and wait a moment while Templot does the calculations. 5. you will then need to split the underlying original background template and shorten each half back accordingly. This method won't work as it stands for transition curves, it is for straights and fixed-radius curves only. Also it is very easy to have the tracks crossing at too short an angle. Templot can't produce crossings shorter than 1: 1.5 RAM ( i.e. not more than 33.7 degrees). This method also works for two straight tracks intersecting, but in that case the result is a regular diamond-crossing. regards, Martin. |
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posted: 29 Jan 2015 12:49 from: Robert M Dixon
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Hi Martin, Thanks for your prompt reply. I have followed your instructions for the first method and have reached the 'create curviform ladder.' At 3 it says 'click to create a branch track...' When I do that a branch track is created from the diamond at the'top , left hand end.' If this is correct, can you give me a slightly more detailed instructions as to creating 'double track,' and splitting off and inserting the second turnout. I can do the 'snake' bit. From being very unsure of how to use Templot, I am now enjoying the 'challenge' of understanding how it works. Perhaps I'm c.5% towards being an expert - great program. ;) |
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posted: 30 Jan 2015 00:55 from: Martin Wynne
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Robert M Dixon wrote:If this is correct, can you give me a slightly more detailed instructions as to creating 'double track,' and splitting off and inserting the second turnout.Hi Mike, I have made a quick scruff video showing the process. If you restart Templot you should see it in the help > watch a video > menu list: 2_291949_390000000.png  If not, click the help > obtain video list menu item and then try again. If still no joy, you can download from: http://templot.com/fbr/Scruff_Video_curviform_double_junction___2.fbr It should open in the Templot Video Player. If not click help > video player only and open it from the File menu. Ask again if anything is unclear. • I left the turnout timbering as square-on. In many cases equalized timbering would be more appropriate for a double-junction, if both routes see similar traffic. Over to you on that. regards, Martin. |
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posted: 30 Jan 2015 12:12 from: Robert M Dixon
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Hi Martin, Thanks for the video which I have just watched, and can understand. There were so many steps that I had not used or understood before and will find it useful for other track building projects. The work you have put in is much appreciated. Thanks again Mike D. |
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posted: 31 Jan 2015 02:26 from: Martin Wynne
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Hi Mike, I have now revised and extended the double-junction video to show how to widen the track spacing for the diverging route, and reduce its radius. It should update automatically in the help > watch a video menu list when you restart Templot. But if not it can be downloaded from: http://templot.com/fbr/Scruff_Video_curviform_double_junction___2.fbr 2_302126_070000000.png  regards, Martin. |
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posted: 31 Jan 2015 17:44 from: Hayfield
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Martin I watched the first video and used it to do my own template, very surprised how straight forward it is to do John |
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posted: 1 Feb 2015 09:45 from: Robert M Dixon
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Hi Martin, Thanks for the update. As John writes, the process is very straightforward and quick. As I have three double junctions to produce the information from yourself will speed up the process considerably. Next job is to learn about easements of which there is a good video. Thanks again Mike D. |
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posted: 2 Feb 2015 16:52 from: Robert M Dixon
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Hi Martin, Thanks for update on Scruff Video on Double Junction. I have completed a printout and it fits perfectly on my new layout. I have watched the extra tutorial and will likely use that later. At the moment I have based the radii on the initial turnout I use for building the double junction. I've also looked at the slip video. I find that the information panels included are very helpful. I, perhaps like many others, are not familiar with all aspects of point and crossing terminology and whilst one can obtain the information from a variety of sources it is really helpful to have the details on the actual track building part of the program. Thanks again Mike D. |
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posted: 29 Sep 2015 13:22 from: John Tothill
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Hi Another newbie here. First I must say what an amazing program this is - only problem is the hours that I am spending playing with it! Earlier in the topic Martin wrote: Also it is very easy to have the tracks crossing at too short an angle. Templot can't produce crossings shorter than 1: 1.5 RAM ( i.e. not more than 33.7 degrees). Is this a limitation of Templot or is it possible to create a 'Retford' in a different way? John |
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posted: 29 Sep 2015 13:38 from: Martin Wynne
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John Tothill wrote:Earlier in the topic Martin wrote:Hi John, Welcome to Templot Club. It's partly a limitation of Templot's mathematics -- you can see things starting to go wrong as you shorten a half-diamond using F5 to very short angles. But it is also a prototypical limitation in that the method of construction changes, and varies a lot with different companies and periods. It's doable in Templot if you enjoy using lots of partial templates and timber shoving. You would need a prototype drawing. There is one, and more about all this, here: topic 160 - message 807 regards, Martin. |
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