Modifying a crossover to align timbers

[Phil O]

HI All,

Can any of you remember which Zoom meeting it was, where Martin showed us how to adjust the 2nd turnout in a crossover so that the timbering alighned with that on the 1st turnout, with a slight increase in track centres.

Many thanks

 

[Steve_Cornford]

I think it was the last one

 

[Phil O]

Thanks, Steve, I'll give it a watch.

 

[Steve_Cornford]

Hi Phil,

Action > mouse actions: control / geometry > slide through peg
which is <shift+F9>
Very Useful Zoom Meeting

 

[Martin Wynne]

Hi Phil,
View attachment 9282
Action > mouse actions: control / geometry > slide through peg
which is <shift+F9>
Very Useful Zoom Meeting

@Steve_Cornford @Phil O

Hi Steve, Phil,

The peg needs to be on the TXP crossover mid-point <ctrl+5> , which it will be immediately after creating the crossover, but might not be later:

n.b. note that sliding through the peg does not change the curving radius in the template. If the crossover is curved, this means that the turnouts will no longer be strictly concentric for double-track. If this function is used only to align the nearest timbers, it is likely that the discrepancy will be insignificant. Edit -- see below in 244d.

cheers,

Martin.

 

[Phil O]

Martin & Steve,

Thanks very much.

 

[Steve_Cornford]

Hi Martin,
If we use the slide through peg function to determine the best track centres, then delete the crossing template & delete the original template to control, then create the crossing choosing the required track centres, will that preserve the concentricity?
Steve

 

[Martin Wynne]

Hi Martin,
If we use the slide through peg function to determine the best track centres, then delete the crossing template & delete the original template to control, then create the crossing choosing the required track centres, will that preserve the concentricity?
Steve

@Steve_Cornford @Phil O

Hi Steve,

It would do, but it's a lot of faff.

Your question has prompted me to do a bit of new coding for track planning -- it's ages since I did any of that.

In 244d after selecting the slide through peg mouse action you will now get two new options:

.

If you answer yes, it will be sorted out automatically.

The above options won't appear if the templates are on a transition curve (in which case a crossover usually needs further adjustment anyway). Or for plain track templates.

These options make sense only for ordinary double-track crossovers with regular V-crossings -- in most other cases of using the slide through peg mouse action you would want to answer no.

Prototypically it's all a bit suspect. For running line junctions the ruling curves are determined by the line speeds -- the design office don't fiddle about with the track geometry just to accommodate more convenient timbering. For yards and sidings anything goes of course. But in models we are always trying to fit things in tight spaces and using sharp curves, so we can fudge things a bit.

Will be in 244d soon. Edit: now available.

cheers,

Martin.

 

[Martin Wynne]

Will be in 244d soon.

Templot update version 244d is now on the server.

Martin.

 

[Steve_Cornford]

Thank you Martin, glad you enjoyed the coding.
Hope you didnt miss out on the Aurora Borealis!

edited to correct typo

 

[Martin Wynne]

Hope you didn't miss out on the Aurora Borealus!

I went out looking, but didn't see much from here.

I will try again tonight.

Martin.