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Penrhos1920
Member
- Location
- Stockton on Tees
I think I've found an error whilst making a Return Curve from a turnout with contra curving. The Return curve does not line up with the turnout correctly.
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The Plug Track functions are experimental and still being developed. Some of the earlier pages of this topic are now out-of-date.
For an updated overview of this project see this topic. For some practical modelling aspects of using Plug Track see Building 3D Track.
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Some pages of this and other topics include contributions from members who are creating and posting their own CAD designs for 3D printing and laser-cutting. Do not confuse them with Templot's own exported CAD files. All files derived from Templot are © Martin Wynne. -
The Plug Track functions are experimental and still being developed.
For an updated overview of this project see this topic. For some practical modelling aspects of using Plug Track see Building 3D Track.
The assumption is that you have your own machines on which to experiment, or helpful friends with machines. Please do not send Templot files to commercial laser cutting or 3D printing firms while this project is still experimental, because the results are unpredictable and possibly wasteful.
Some pages of this and other topics include contributions from members who are creating and posting their own CAD designs for 3D printing and laser-cutting. Do not confuse them with Templot's own exported CAD files. All files derived from Templot are © Martin Wynne.
Error when making a Return Curve
- Thread starter Penrhos1920
- Start date
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Martin Wynne
Admin
- Location
- West of the Severn UK
- Info
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Enjoy using Templot?
Thanks.
Please do not send requests for help direct to me via email.
Post your questions on the forum where everyone can see them and add
helpful replies.
@Penrhos1920
Hi,
The return curve function does not work when the control template contains a transition curve. You should have seen this warning:
Did the warning not appear? If so that is a bug, thanks for reporting it. However, I am unable to reproduce it. Perhaps it needs stronger wording.
Instead of a return curve, try making a simple link instead:
https://85a.uk/templot/companion/make_simple_link.php
cheers,
Martin.
Hi,
The return curve function does not work when the control template contains a transition curve. You should have seen this warning:
Did the warning not appear? If so that is a bug, thanks for reporting it. However, I am unable to reproduce it. Perhaps it needs stronger wording.
Instead of a return curve, try making a simple link instead:
https://85a.uk/templot/companion/make_simple_link.php
cheers,
Martin.
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Phil G
Member
- Location
- New Zealand
Hi Martin,
I tried to copy this box file and then use a simple link as you suggested, but with zero success.
so I tried the attached idea which uses two transition curves. Clearly not 100% sure what Penrhos 1920 was trying archive, so I have just made the two roads parallel.
what I tried to do was to use a hand positioned transition S curve, in the end I found I needed two translon S curves.
hence my question. Am I on the right lines with this approach?
cheers
Phil,
I tried to copy this box file and then use a simple link as you suggested, but with zero success.
so I tried the attached idea which uses two transition curves. Clearly not 100% sure what Penrhos 1920 was trying archive, so I have just made the two roads parallel.
what I tried to do was to use a hand positioned transition S curve, in the end I found I needed two translon S curves.
hence my question. Am I on the right lines with this approach?
cheers
Phil,
message ref: 8671
Martin Wynne
Admin
- Location
- West of the Severn UK
- Info
- .
Enjoy using Templot?
Thanks.
Please do not send requests for help direct to me via email.
Post your questions on the forum where everyone can see them and add
helpful replies.
message ref: 8673
Martin Wynne
Admin
- Location
- West of the Severn UK
- Info
- .
Enjoy using Templot?
Thanks.
Please do not send requests for help direct to me via email.
Post your questions on the forum where everyone can see them and add
helpful replies.
@Penrhos1920 @Phil G
Scruff video showing using simple link:
https://flashbackconnect.com/Default.aspx?id=ElJ_r4a1s1jwFeqe7u2TkA2
cheers,
Martin.
Scruff video showing using simple link:
https://flashbackconnect.com/Default.aspx?id=ElJ_r4a1s1jwFeqe7u2TkA2
cheers,
Martin.
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Penrhos1920
Member
- Location
- Stockton on Tees
@Martin Wynne
Thanks that video is exactly what I was trying to do. I do get the Handy Hit dialogue, but as it's only a hint not heeded it. Maybe if it were a warning I would have looked closer.
I've tried doing both Making a Return and Make a Simple Link and my brain can't fathom why they make slighly different curves.
Thanks
Thanks that video is exactly what I was trying to do. I do get the Handy Hit dialogue, but as it's only a hint not heeded it. Maybe if it were a warning I would have looked closer.
I've tried doing both Making a Return and Make a Simple Link and my brain can't fathom why they make slighly different curves.
Thanks
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Penrhos1920
Member
- Location
- Stockton on Tees
I've been comparing the Peg Simple Link and Make Return Curve tools. So far I've not been able to find a case where neither of these will produce an acceptable result.
I've found 14 cases where only one of the tools works. In 5 cases the error was big and could be seen on the screen. In the other 9 cases the failure gave an almost acceptable result that can't be discerned by eye on the screen. Using the Peg Extend/Shorten tool showed that the angular error was less than 1.5° can could be corrected during building.
From now on I will be using the Peg Extend/Shorten tool to confirm that ends of the product curve both align with the turnout and adjacent track. I think that it would be heplful if Templot could do this automatically.
Thanks
Penrhos
I've found 14 cases where only one of the tools works. In 5 cases the error was big and could be seen on the screen. In the other 9 cases the failure gave an almost acceptable result that can't be discerned by eye on the screen. Using the Peg Extend/Shorten tool showed that the angular error was less than 1.5° can could be corrected during building.
From now on I will be using the Peg Extend/Shorten tool to confirm that ends of the product curve both align with the turnout and adjacent track. I think that it would be heplful if Templot could do this automatically.
Thanks
Penrhos
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