Templot Club Archive - Search Results
To search again, click the Back button in your browser.
Search results for: Curviform
167 results found.
9 pages of results.
... topic is obsolete. Irregular diamond-crossings are now fully supported in Templot2. Check rails are adjustable by mouse action in Templot2. I thought I would start a topic where I can report occasionally about what I'm currently working on in Templot. Comments and suggestions welcome, but don't leave it too long or I may have moved on to something else. I'm minded to stop using the term "irregular" diamond-crossing because it has the potential to be confused with an error condition. Instead I'm thinking of calling them "curviform" diamond-crossings. We can't simply call them "curved" because of course a regular diamond-crossing can be curved. Comments welcome: Make Ladder Crossover A ladder track is one which crosses running lines diagonally, comprised of a string of diamond-crossings and/or slips. In Templot a ladder is created by clicking the tools> make ladder crossover menu item repeatedly, once for each diamond-crossing. This makes it possible to change the adjacent track spacing for each diamond-crossing (geometry> adjacent ...
... - message 812 regards, Martin. posted: 11 Apr 2017 23:29 from: Martin Wynne Panos Tsirigotis wrote: Is it possible to make a diamond crossing (with flatter than 1:1.5 angle) and one of the two tracks curved? Hi Panos, Yes, one or both templates can be curved. If the radii are not the same or not curving in the same direction, the result is an irregular diamond-crossing (in which the crossing angles at each end differ). Templot will normally set curviform V-crossings in this case. regards, Martin. posted: 12 Apr 2017 13:22 from: Panos Tsirigotis Hello again. I ve tried but I get the following message: "Sorry, this function is not available because the control template contains a transition curve. If the intersection is not within the transition zone, try again after using the[ tools> make split>] menu options accordingly. If the intersection is within the transition zone, you may be able to perform this operation manually by moving ...
... topic: 2224 tools> make ladder crossover posted: 27 May 2013 19:35 from: richard_t Hi I think the tools> make ladder crossover menu items are the wrong way around, and perhaps don't work? When I select tools> make ladder crossover> make curviform ladder I get a warning saying that "You are about to make a REGULAR ladder..." and a diamond with regular vees is created. When I select tools> make ladder crossover> make regular ladder, I don't get the warning, but the crossover is still created with regular vees. Also the help menu item in the tools> make ladder crossover doesn't do anything. Hope it helps. Richard. posted: 27 May 2013 20:34 from: Martin Wynne richard_t wrote: I think the tools> make ladder crossover menu items are the wrong way around, and perhaps don't work? When I select tools> make ladder crossover> make curviform ladder I get a warning saying that "You are about to make a REGULAR ladder..." ...
... topic: 2616 When to use a curviform common crossing posted: 27 Jan 2015 09:36 from: Godfrey Earnshaw This is just a little something that keeps puzzling me. If I create a new turnout it appears to always be formed with a "regular" V crossing. If I curve the turnout it maintains the same "regular" V crossing. If I "insert" a turnout in an existing length of plain curved track it creates a turnout with a "regular" V crossing. My instincts tell me that at some point a "curviform" V crossing would be more suitable. So my question is "when and why" would I use a "curviform" crossing? posted: 27 Jan 2015 09:50 from: Godfrey Earnshaw Sorry guys just found the answer from a Mr Martin Wynne. Posted 28 April 2010- 04:05 http://www.rmweb.co.uk/community/index.php?/topic/14277-crossing-vees-on-curved-points/ posted: 27 Jan 2015 23:03 from: ...
... topic: 3649 regular or curviform? posted: 20 Apr 2020 07:21 from: Martin Wynne For the umpteenth time over the years, I have just posted a reply on RMweb explaining the difference between regular and curviform V-crossings, and how the latter can make more space in a cramped yard. It may as well be copied here: I fear there is insufficient room in the yard for a loading gauge or a crane Both of your turnouts need to be changed to curviform type V-crossings. This will improve the line of the curves and make more space. You might find that you could then use shorter turnouts. To change the type of V-crossing, click the green R indicator so that it changes to C: 2_200116_490000000.png You can see that in a regular V-crossing the part of the turnout marked in yellow is curving in the same direction as the main road. Changing to curviform causes that part of the turnout to curve away from the main road, creating more space between the tracks if the tracks ...
... topic: 3068 Curviform crossings- timbering posted: 30 Aug 2017 03:30 from: Martin Wynne Dear all, There's a detail in Templot which has been niggling away at me for years. No-one has ever mentioned it, but I have finally decided to do something about it. The REA special crossing chairs for each crossing angle are designed for timbers spaced at the standard spacing of 30", and with the vee rails separating at a rate determined solely by the crossing angle. Which is true in the case of regular and generic type V-crossings. Such combined crossing chairs are needed where the rail separation across the rail heads is less than about 15". Beyond that two ordinary chairs can be used to hold the vee rails in most cases. However, in the case of curviform type V-crossings it is not true. Because the turnout curve continues along the diverging rail, that rail separates from the main rail more rapidly than is the case for regular V-crossings. The crossing chairs are designed for fixed ...
... topic: 711 Curviform type of V-crossing posted: 26 Jan 2009 11:58 from: Martin Wynne Howard wrote (in another topic): what exactly is a curviform crossing Hi Howard, This screenshot shows a turnout with contraflexure, or negative curving. In other words, it is clearly a left-hand turnout (trace the track centre-lines), but it is curving in the opposite direction, to the right: curviform_exit.png In fact it is two turnouts overlaid. One is set for a generic type of V-crossing. The other is set for a curviform type of V-crossing. You can see that they are identical, apart from the alignment of the rails between A and B, forming the exit for the turnout road: curviform_exit1.png In the case of a regular or generic V-crossing, these rails are curved to the same radius, and in the same direction, as the main road (the lower centre-line above). This is the normal situation, for example in a curved crossover ...
... crossing angles also to differ. The most common use for an irregular diamond-crossing is in a double junction. Last edited on 18 May 2011 16:17 by Martin Wynne posted: 18 May 2011 16:56 from: Martin Wynne There are 3 ways to create an irregular diamond-crossing: 1. Start with a regular half-diamond template. Change the K-crossing angle using F10 mouse action and/or change the V-crossing angle using F9 mouse action. In most cases change also to a curviform type of V-crossing -- real> V-crossing options> curviform V-crossing menu item. (For this method this setting is optional.) Click the tools> make diamond-crossing menu item. If the angles differ, the result will be an irregular diamond crossing. If the angles are the same, the result will be a regular diamond-crossing. 2. Start with a turnout having a curviform V-crossing. Click the tools> make ladder crossover> make curviform ladder menu item ...
... and I gradually worked my way down to a 1'x5' shunting layout, Asok Yard, to use as a test bed for some of my ideas (mainly around turnout motors and electronics). 3620_112044_500000000.png SO... to see if I had learned anything from all my Templot study, I decided to try to replicate that layout as close as I could. This is the result: 3620_112050_290000000.png I was trying to fit to mostly Peco 1st radius curves and the eagle-eyed may have spotted that I made the crossovers with curviform turnouts (and I am sure that I have committed all sorts of other horrors) but apart from the industry siding which I decided looked better at a jaunty angle, I was pretty pleased with the fit. You may be wondering why am I telling you all of this, Well I HAD to tell SOMEONE, and I don't know anyone else who would even understand what I was talking about. Not exactly a thing of beauty, I will grant you, but I think (or at least hope) it may ...
... easement from straight, i.e. setting the 1st radius to straight. The template will remain aligned with the turnout at the other end, because that end is where the peg is. I've read the rest of your message several times, but I'm still not clear what you are asking, sorry. The siding turnout is aligned over a fixed radius curve. This means that there are no straight rails anywhere within it. Which straight bits are you referring to? The V-crossing (frog) type is set to "curviform" so that the turnout curve continues through the V-crossing into the siding. Likewise the main line turnout is also curved, so there are no straight bits in that one either. That one has a "regular" type of V-crossing. This means that the turnout curve terminates in front of the V-crossing where you can see a black line across between the rails. Beyond that the turnout road curves back through the V-crossing following the radius of the main road. regards, Martin. ...
... topic: 1511 Templot2 change log posted: 23 May 2011 15:53 from: Martin Wynne Templot2 Summary of the main changes in Templot since version 091c of February 2008 support for irregular diamond-crossings and curviform ladders platforms can be added alongside track templates check rails can now be individually set and adjusted by mouse action sketchboard layout drawing function rail foot edge lines can be shown on FB templates (flat-bottom rails) print menu renamed output menu output in diagram mode -- solid colour infill between stock rail edges Important: not available for partial templates if stock rails omitted -- temporarily lay plain track templates across complex formations to create diagram-mode output. output to PDF files, including large single pages for roll-paper poster printing export to bitmap image files in PNG, GIF, JPG, BMP formats export to vector image metafiles in EMF, WMF formats easy capture of screenshots to PNG files print now! function to bypass printer setup and calibration background picture shapes -- support for PNG, JPG, GIF image formats background picture shapes ...
12. 'Slewing' curves
... on an isolated template which is not aligned with any others. cheers, Martin. posted: 26 Jan 2018 17:12 from: johndon Thanks Martin, much appreciated. posted: 26 Jan 2018 17:17 from: johndon I see what you mean about just using swell, it gives rise to this effect when the line goes straight, I shall try your other suggestion, thanks again. 2828_261217_340000000.png posted: 26 Jan 2018 17:50 from: Martin Wynne p.s. John, I think the turnout will need a curviform V-crossing. Martin. posted: 29 Jan 2018 11:38 from: johndon Thanks again Martin, I managed to get the plan finished. Out of curiosity, how would you know that the turnout would require a curviform V? Is there some sort of standard of does it just come from experience? John 2828_290637_460000000.jpg posted: 29 Jan 2018 14:12 from: Martin Wynne johndon wrote: Out of curiosity, how would you know that the turnout would require a curviform V? Hi John, There is ...
... topic: 632 Crossover on diverging tracks posted: 16 Nov 2008 22:52 from: Paul Boyd The attached JPEG shows parallel tracks coming in from the LHS. They start diverging at about the 5.5ft mark. I've created a crossover after the divergion point (is that a word??) by a lot of adjusting of crossing angles and roaming until the two turnouts involved line up closely enough for track building. Both turnouts have a curviform crossing. The question is though, how should I have done it so that the turnouts align correctly without all the trial and error faffing about, based on the positions of the diverging tracks being fixed? (I know the timbering is wrong- I haven't started shoving yet!) Attachment: attach_414_632_diverging_crossover .jpg 302 posted: 17 Nov 2008 01:49 from: Richard Spratt Isn't it like turnout 7 in the first tutorial? http://www.templot.com/martweb/tut5a.htm Richard posted: 17 Nov 2008 02:10 from: Paul Boyd Hi Richard Not really, because in that tutorial the turnout is ...
... crossing. Use tools> make branch track on the turnout, and then change it to straight. You can then do peg/align tools> make diamond-crossing at intersection, and add the slip roads in the usual way. If the outer curve is within a transition zone at that location, it gets a bit more involved, but there is a video showing how to proceed, click help> watch a video> Scruff Video Andrew transition diamond. If you want a shorter diamond, change the turnout to a curviform pattern V-crossing before you start. Depending on your ruling radius, that may be preferable anyway. regards, Martin. posted: 9 Aug 2016 09:18 from: mightbe Hi Martin, I suppose I want the road running across the diamond to be straight. I take it that the 'make branch' function takes its radius cue (on regular crossings) from the radius of the diverging route at the V. If the main road is straight, the branch track will be straight (again, assuming a ...
... can CURVE a turnout (mouse action) to make it a Y. posted: 4 Aug 2020 23:55 from: roythebus I've made quite a sharp radius Y point for the folkestone club layout, it took a bit of doing, but from memory I made a normal straight point. Whichever way is the "main" road is the straight. If it's a right hand point, curve it left using the F button. This will give you the basics of the Y point. then change the crossing to "curviform". This may shorten the turnout a bit. you can then adjust the length and radius till your heart's content until it fits where you want. Edited to add I've just tried this on a template to remind myself how to do it. Get the basic template with the turnout on it. By default this is left hand, experiment with a new template. Click on F6 "curving". By moving the cursor up and down this will alter the curve of the turnout. Upwards will make the curve sharper ...
... couple of templates available for downloading which exactly match Peco 00/H0 turnouts. Download from: topic 294 peco_00h0.png But it's not too clear what you are asking? If you are replacing the Peco track you don't necessarily need an exact match. For example a crossover made from Peco Large Radius turnouts could probably be replaced with an ordinary A-7 crossover, and look much better as a result: 00sf_a7_v_peco1.png If you want a closer match to the original, a turnout with a GWR 10ft curved switch and a 1:6 curviform crossing gets close: 00sf_10ft_6_v_peco1.png See also the option of using 00-SF standards if you are handbuilding in 00 gauge: http://00-sf.org.uk regards, Martin. posted: 3 May 2010 13:45 from: roythebus Thanks Martin, I was trying to say I need something that will braodly replace the Peco points without having to alter basebaord joints, platforms and structures etc! I was trying to work out the crossing angle of the Peco stuff.Your comment has answered that for me, thanks. Hopefully the ...
... offers of help. Mike D. posted: 28 Jan 2015 22:22 from: Martin Wynne 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 ...
... fixed, or can they be moved. It would be useful to look at your plan, and see what can be achieved to resolve the issue and make the flow of the track better. All the best, Brian posted: 19 Aug 2014 16:57 from: Martin Wynne Hi John, In addition to Brian's comments, your left-hand turnout has a regular-type V-crossing. This isn't aligning smoothly with the upper exit track. You will get a much better result if you change it to a curviform-type V-crossing. This is often the case when turnouts have significant contraflexure (negative radius). If you change it, you can then increase the crossing angle to about 1:7.5, and snake that turnout back a bit to re-align with the exit track. Doing that will increase the stagger between the switches and increase the space for the switch opening. The right-hand turnout it is currently a B-6, again with a regular V-crossing. I suggest changing that to ...
... this, so really it's just cosmetic. Otherwise good stuff :- D posted: 20 Apr 2011 12:32 from: Martin Wynne richard_t wrote: I actually meant to say (when in sizing mouse action), right click and select "lock switch". I'm not that sure it's important anyhow, as the peg is on the FP and we don't really care what happens to the switch. Hi Richard, If you don't lock the switch when using F5 you will get sudden step changes in the turnout radius through curviform V-crossings, when Templot jumps to the next most appropriate switch size for the crossing angle. This may not affect the final result, but it can be very irritating if you are in the middle of a fine close-up adjustment. Note that such jumping doesn't happen for a custom switch, so an alternative to locking the switch is to use a custom switch on the template. This also lets you adjust the switch heel angle to fine-tune the turnout radius, but repeated iterations can be very tedious ...
... Hi All, (particularly Martin) Still on the subject of irregular diamonds, I having been working on another one for the New Street layout, and the finished result has come up with a strange set of wing rail bends on one of them, the bend appears to be, I can only describe as, 'joggled', as shown in the screenshot of the attached GIF file. Now this particular Vee crossing has the following data: 9 ft. straight heel right-hand switch (unjoggled) 1 in 2.76 RAM curviform V-crossing( 1 in 2.85 CLM) (I know Templot suggests that such small angles not be used[ less than 1: 4], but the layout dictated this). Also as previously reported, I have recently received some copies of original LNWR civil engineering drawings of their Vee crossings and diamond crossings, and they go right down to prototype angles of 1: 2 !!! I have also included in the attached GIF file another screenshot of a similar angled diamond vee crossing, but this one appears ...
Search took 0.099 seconds
Back to Templot Club