click here for a list of all existing Templot documentation
  Important Privacy Information cookie information pre-print options:    

 click image to open Templot Club in a new tab             Search           remove page highlighting
Templot club top logo
    looking for help? -                         enjoy using Templot? -
looking for Templot? - (free)



 you are not logged in  - Login | Join


receive all messages by email: info


Recent Topics
Front Page  Search  Image Gallery  Gallery Upload  My Account  Members  Open Source  TemplotMEC  Help  
make a donation  
please click: important information for new members and first-time visitors Templot Companion - User Guide
            messages archive on Yahoo
page trail:  Templot Club > Forums > Trackbuilding topics > CAD drawing of a rail chair
Templot web site

                 CAD drawing of a rail chair
     
 Start new topic   Reply blank   Printer friendly 
  Rate this topic  
AuthorMessage
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
1st message | this message only posted: 28 Sep 2019 08:54
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
I've just ordered a DLP 3D printer and i'm going to try and produce some chairs and sleepers. I'm looking to purchase chair drawings or even full 3d cad drawings, preferably GWR 3 hole chairs to start off with. 
__________
message ref: 27890

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
2nd message | this message only posted: 28 Sep 2019 12:58
 PM  Reply with quote  Reply blank 
from:
Martin Wynne
West Of The Severn, United Kingdom



view images in gallery
view images as slides

Please do not send requests for help direct to me via email or PM.

Post your questions on the forum where everyone can see them and add helpful replies.
Tom Allen wrote: I've just ordered a DLP 3D printer and i'm going to try and produce some chairs and sleepers. I'm looking to purchase chair drawings or even full 3d cad drawings, preferably GWR 3 hole chairs to start off with. Hi Tom,

Most GWR chairs had 2 holes. The REA chairs used by other companies had 3 or 4 holes.

Are you looking for CAD drawings of the raw chair casting, or with screwheads and key in place? If the latter you need to specify the model scale and details of the model rail section.

For example, most 0 gauge modellers use code 125 bullhead rail, even though the common prototype BS-95R bullhead rail scales to code 131. I've never understood why that is, but it does mean that the key-top dimensions have to be modified to fit, and also to allow for the greatly overscale web thickness in all model rail sections.

Also the keys are tapered wedges which normally remain projecting from the chair on the side from which they were driven. So you also need to specify which side, and by how much they remain projecting.

Very soon Templot will be able to generate some DXF files for 3D printing. There is no charge for them, but on the other hand nor is there any guarantee that they are correct or represent any particular prototype. In fact I can say now that they don't and won't, because the curves and fillet radii in the original castings have to be simplified to keep the drawing complexity and file size within reasonable limits.

Here for example is an REA 3-hole S1 chair generated by Templot, for BS-95R rail in 7mm/ft scale (no such model rail actually exists):



  

Note that this is for vertical rail. Prototype rail is inclined at 1:20. Model chairs are not strong enough to maintain rail at 1:20 inclination through the various bends in pointwork.

File attached below, in mm units. You will need to change the scale and modify the key and inner jaw dimensions to suit your rail.

If you find it useful, do please post some pics of the results here. Have fun with your new printer. :)

cheers,

Martin.

__________
message ref: 27892
Attachment: tc_3d_0_mf_bs95r_mm.dxf (Downloaded 10 times)
 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
3rd message | this message only posted: 28 Sep 2019 13:30
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
thanks Martin, p4 is the scale/gauge and code 75 is the rail (c&l). If 2 bolt were more prevalent then i can easily go down that route.
__________
message ref: 27893

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
4th message | this message only posted: 28 Sep 2019 13:31
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
edited. As soon as i get it i'll be experimenting on the chairs so there'll be a few photos appearing.
__________
message ref: 27894

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
5th message | this message only posted: 28 Sep 2019 20:31
 PM  Reply with quote  Reply blank 
from:
Phil O
Plymouth, United Kingdom



view images in gallery
view images as slides
Hi Tom,

If you have a look on page 5 of share and show, you will see photos and footprint drawings of GW special chairs, which may prove useful to you.

Sorry I can't give you links.

Cheers Phil.
__________
message ref: 27899

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
6th message | this message only posted: 28 Sep 2019 20:32
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
thanks Phil
__________
message ref: 27900

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
7th message | this message only posted: 28 Sep 2019 20:37
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
found this earlier
__________
message ref: 27901
Attached Image (viewed 202 times):

gwr-chair-pamphlet-1751 (1).jpg
 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
8th message | this message only posted: 29 Sep 2019 20:52
 PM  Reply with quote  Reply blank 
from:
Martin Wynne
West Of The Severn, United Kingdom



view images in gallery
view images as slides

Please do not send requests for help direct to me via email or PM.

Post your questions on the forum where everyone can see them and add helpful replies.
Phil O wrote: Hi Tom,

If you have a look on page 5 of share and show, you will see photos and footprint drawings of GW special chairs, which may prove useful to you.

Sorry I can't give you links.

Cheers Phil.
Hi Phil, Tom,

Here are the topic links:

http://85a.co.uk/forum/view_topic.php?id=182&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=184&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=186&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=187&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=188&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=189&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=190&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=191&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=192&forum_id=12

http://85a.co.uk/forum/view_topic.php?id=204&forum_id=12

cheers,

Martin.

__________
message ref: 27905

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
9th message | this message only posted: 1 Oct 2019 22:33
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
i can honestly say i hate Solidworks, but i've persevered and got something rough drawn up.

PS. the dlp printer has arrived (Photon) and the engineer in me has already looked at ways to improve (alter) it.
__________
message ref: 27927
Attachment: 2 bolt chair finished 3.JPG (Downloaded 25 times)
 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
10th message | this message only posted: 6 Oct 2019 12:13
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
ok i have a working chair, it slides well on c&l code 75 bullhead rail and keeps the 1 in 20 cant. Unfortunately the resin i have is clear green so getting a good pic is quite hard. By eye the detail is great so i'll be ordering some black, brown or grey resin to get it clearer to view. Anyway here's the pic.
__________
message ref: 27983

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
11th message | this message only posted: 6 Oct 2019 15:33
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
and a group photo
__________
message ref: 27985

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
12th message | this message only posted: 6 Oct 2019 17:53
 PM  Reply with quote  Reply blank 
from:
Andrew Barrowman
USA

 

view images in gallery
view images as slides
Hi Tom,

Have you considered printing timbers complete with chairs?  I printed this as an experiment at Shapeways. That's too expensive for me but it might make sense on a home printer.

I went a bit further and printed the rail too :D. It's capped with a NS "U" channel.

Cheers!
Andy





__________
message ref: 27987

 
 Clicked a link? Wrong message? Wait until the page has finished loading, click in the address bar and then press the Enter key. This is a timing bug in some browsers.
13th message | this message only posted: 6 Oct 2019 17:55
 PM  Reply with quote  Reply blank 
from:
Tom Allen
 

 

view images in gallery
view images as slides
as it goes, i've just printed some sleepers and i'm currently drawing up a sleeper with chairs on
__________
message ref: 27988

 
This is topic ID = 3511     Page created at 22:42 (local time)  
You can type a quick reply to this topic here.

Click in the box to begin.


But to reply to an individual message, or to include images, attachments and formatted text, use the reply buttons on each message above.

To start a new topic in this forum, click the Start new topic button below.
To start a new topic in a different forum, click the Forum Jump drop-down list below.

             Start new topic 

 click to jump to a different forum:     Back to top of page

Templot Club > Forums > Trackbuilding topics > CAD drawing of a rail chair
about Templot Club

list recently active topics Templot Companion - User Guide - A-Z Index Templot Explained for beginners Please click: important information for new members and first-time visitors.
indexing link for search engines

back to top of page


Please read this important note about copyright: Unless stated otherwise, all the files submitted to this web site are copyright and the property of the respective contributor. You are welcome to use them for your own personal non-commercial purposes, and in your messages on this web site. If you want to publish any of this material elsewhere or use it commercially, you must first obtain the owner's permission to do so.

The small print: All material submitted to this web site is the responsibility of the respective contributor. By submitting material to this web site you acknowledge that you accept full responsibility for the material submitted. The owner of this web site is not responsible for any content displayed here other than his own contributions. The owner of this web site may edit, modify or remove any content at any time without giving notice or reason.
Problems with this web site? Contact webmaster@templot.com.   This web site uses cookies: click for information.  
© 2019  

Powered by UltraBB - © 2009 Data 1 Systems