Hayfields 7mm 3D Printed Turnouts

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martin_wynne

martin_wynne

Western Thunderer
Tim Humphreys ex Mudhen said:
John,

In 7mm scale what section rail are the chairs designed to accept or is this a variable that can be changed by the user?

Tim
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@Tim Humphreys ex Mudhen

Hi Tim,

pre-sets:


rails_1.png


or custom:

index.php


The fish angle on all prototype UK REA bullhead and jointed flat-bottom track is 1:2.75 , but on most model rail sections it is steeper at around 1:1.5

It is better to set it too steep rather than too flat to ensure the key clears.

The fishing faces are dimensioned from their intersect on the rail section centre-line. The head and foot depths can then be derived if needed, but you don't need to enter them because Templot calculates them.

cheers,

Martin.
 
Hayfield1

Hayfield1

Western Thunderer
Tim Humphreys ex Mudhen said:
John,

In 7mm scale what section rail are the chairs designed to accept or is this a variable that can be changed by the user?

Tim
Click to expand...

Tim

Thank you for the question and I see Martin has come to the rescue, I am using C&L code 125 (I have stocked up) and I see the Scale7 stores also supplies code 125

I am happy to make you a Scale7 common crossing print or a turnout print in 33mm gauge for use with code 125 rail, if you are interested PM me.

I am a Scale7 member but model to 0/0MF gauge, am planning to go to Albury next year and if wanted happy to demonstrate the system there

John
 
Hayfield1

Hayfield1

Western Thunderer
246.jpeg

Second switch rail formed and fitted, the turnout was tested and is very smooth running, next up is to fit the bonding wires

247.jpeg

I am afraid I made the wing rails too long so the fishplates had to be altered, lesson learnt, measure twice and cut once (or put my glasses on!!)

Anyway the initial test with both a wagon and locos under power has gone well, must get round to buying some paint which will transform the looks no end. and print some plain track, simply because I can and its cheaper and curves more accurate

John


"3D designs copyright © Martin Wynne and OpenTemplot contributors".
 
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Hayfield1

Hayfield1

Western Thunderer
Hayfield1 said:
Tim

Thank you for the question and I see Martin has come to the rescue, I am using C&L code 125 (I have stocked up) and I see the Scale7 stores also supplies code 125

I am happy to make you a Scale7 common crossing print or a turnout print in 33mm gauge for use with code 125 rail, if you are interested PM me.

I am a Scale7 member but model to 0/0MF gauge, am planning to go to Albury next year and if wanted happy to demonstrate the system there

John
Click to expand...

Tim Humphreys ex Mudhen said:
PM sent John,
Tim
Click to expand...

For those who may be wondering about these replies, Tim has gracefully accepted to trial build and test a turnout printed to Scale7 standards. This in fact serves two purposes in, a build being experienced by someone not associated directly with the project and a turnout being tested with Scale7 stock.
 
martin_wynne

martin_wynne

Western Thunderer
Hayfield1 said:
For those who may be wondering about these replies, Tim has gracefully accepted to trial build and test a turnout printed to Scale7 standards.
Click to expand...
@Hayfield1 @Tim Humphreys ex Mudhen

Hi John,

You are jumping ahead of me into Scale7 before I have had a chance to test it myself. I fully expect that some adjustment to the default settings will be necessary.

For Scale7, please be sure that you have measured and adjusted the FDM shrinkage for accurate track gauge. All printers are different and may need fine tuning for Scale7 tolerances.

Likewise there is a backlash adjustment utility for use on the gcode file. I have found that it can make a significant improvement in dimensional accuracy, but only if the backlash settings have been correctly established first. It is especially useful in printing the filing jigs.

There is also a means to tweak the flangeway gaps should that be necessary.

Tim -- if the Scale7 results are less than 100%, which I suspect they might be, please report your findings on the Templot Club forum rather than here. Thanks.


fdm_shrinkage.png

backlash_1.png

flangeway_adjust.png

cheers,

Martin.
 
Hayfield1

Hayfield1

Western Thunderer
Martin

First print gauge using my cheap digital calipers

Gauge 32.98mm at the toe and consistent at the other end of the first brick
Outside of rail to outside of rail 36.13mm

Will check each print as it's ready

I am more interested in Tim's thoughts on the build process, secondary on how stock reacts. But yes certainly keep results initially within Templot club, so if any tweaks are needed we can act on them
 
martin_wynne

martin_wynne

Western Thunderer
Hayfield1 said:
But yes certainly keep results initially within Templot club, so if any tweaks are needed we can act on them
Click to expand...
Hi John,

That's not the reason. If there are any reports on the internet that stuff doesn't work, it will spread across the forums in days, and we will never, ever be able to fully correct it. It will keep popping up again and again. I am so tired of explaining Templot stuff over and over again -- I've been doing it for 25 years.

cheers,

Martin.
 
Hayfield1

Hayfield1

Western Thunderer
Martin

Had it been me I would have given up explaining things over and over again years ago, your patience with us is amazing. Templot has grown in leaps and bounds over the past 25 years, many in over time complained it was too difficult to learn, but as time goes bymany have come back and found it works better and better

Over the past 2 years at Scaleforum (first year being on the C&L stand) I have heard little of any negative comments, I think the worst was it can only do simple points !!!. To be quite honest receive this as a compliment, firstly they are admitting it works (something plastic chaired track has never shaken off) secondly we know what it can do even in its experimental stage.

Granted the bulk of replies in the past have been handled by yourself, hopefully others have now stepped up to reduce your work load.

Do go out and grab some sunlight and take the odd photo whilst the sun is out

Thanks for all you have done, its quite splendid !!
 
Hayfield1

Hayfield1

Western Thunderer
What I have not paid too much attention to are the filing Jigs, the main issue is the rail being held firmly enough in the jigs, its mainly down to fine tuning the settings owing to shrinkage. Initially I reduced the depth by 0.1mm (on each half) this had the visual appearance that the rail was being gripped tight. But whilst I was getting fantastic results filing across, I got the sense the width was too large (possibly down to shrinkage)

Anyway I reduced the setting from 1.6mm to 1.5, now the rail is a tight fit, BUT is held rock solid when filed along the rail

I will try this setting on one of the switch rail jigs.

This is why we keep empathizing Cot and plug track is still being developed

My trials are with the Neptune 4 other make of printers may react differently

Also I am using Esun PLA+ filament, Martin may be getting slightly different results with Sunlu PLA+. So do bear with us as we test the system, especially if some get differing results using different machines and or filament

John


"3D designs copyright © Martin Wynne and OpenTemplot contributors".
 
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Hayfield1

Hayfield1

Western Thunderer
Having a bit of a pause with actual printing and trying to get on with a couple of loco builds as well as having a bit of a rest from it

However on Templot Club I am trying to put together a COT track build guide. Its not the full process as the initial stages of 3D printing is the same for Plug track as it is for COT track.

Also I have not covered the filing jigs, as these not only are used for Plug track, but are equally useful for those who use traditional build methods, in fact in many cases essential for home builders, especially the switch filing jigs, which in my view are the easiest switch filing jigs I have ever used. I am actually surprised no one has tried selling them

Here is a link the the thread COT track build explained

The article is still being developed, as is Templot 3D and there will be a need to update the odd section after the next Templot revision as Martin has further refined the common crossing

Anyway its good to see the major leaps Templot has achieved this year, certainly the 7mm scale modelers have been the major benefactors

John
 
Hayfield1

Hayfield1

Western Thunderer
One of the Templot plug track active members is now offering both laser cutting track templates and resin printing chairs amongst other services

Kosmik.co.uk

For an initial period he is selling them at cost price of £14.50 + £3 P&P and £23 + £3 P&P for 7mm. I have ordered a 7mm kit which I ill be reviewing and will have it with me at the two meetings/shows I/we have been invited to

Below is the contents of a 4mm kit

This sample kit contains the following items:

1 x Laser cut Ply timber base (1 piece 400mm W x 100mm H)

1 x set of 3D printed Resin Chairs comprising of:

  • 60 x S1 Fixed Jaw
  • 10 x S1J Fixed Jaws
  • 20 x L1 Fixed Jaws
  • 12 x P Fixed Jaw
  • 10 x CC Running Rail Fixed Jaw & Check Rail slotted for loose jaws
  • 5 x CCL Running Rail Fixed Jaw & Check Rail slotted for loose jaws
  • 5 x CCR Running Rail Fixed Jaw & Check Rail slotted for loose jaws
  • 20 x Loose Jaws
  • 1 set of x8 Heel Chairs + 8 L1 chairs Solid Jaws
  • 1 set of x4 vee crossing chairs - slotted for loose jaws
  • 1 set of loose jaws for above
1734525405024.png

1734525405024.png

This is a copy of the selections of chairs and frets in the 7 kit

I will be posting the contents and later the build in this post
 
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