×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Topcon TL20Df tripod attachment approximately 33mm female thread.
2

Topcon TL20Df tripod attachment approximately 33mm female thread.

Topcon TL20Df tripod attachment approximately 33mm female thread.

(OP)
Hello I am very interested in getting to know a Topcon TL20DF theodolite in order to change my Trade as a bricklayer into a setting out engineer.can anyone help me fit the instrument to the tripod it has a 33mm female thread,As always shops only want to sell you something brand new and space age.
But I am going to understand the jolly old basics 1st [color ][/color]

RE: Topcon TL20Df tripod attachment approximately 33mm female thread.

You need help mounting a device to a tripod? Not exactly the level of student question we're expecting around here...

Dan - Owner
http://www.Hi-TecDesigns.com

RE: Topcon TL20Df tripod attachment approximately 33mm female thread.

Nirrad,

Camera tripods have 1/4‑20 threads. UNC seems to work, but actually, they are supposed to be 1/4‑20BSW.

Any surveying tripod I have ever seen is 5/8‑11UNC. This is no where near 33mm.

A metric thread would be something like M33×1 or M33×0.7, with the second number being the thread pitch.

--
JHG

RE: Topcon TL20Df tripod attachment approximately 33mm female thread.

(OP)
Thank you drawoh.
I will make something up to get me underway.
I understand it to be somewhat odd but the optical plumb to the datum is viewed through the connecting screw.
Things are laser guided on the new equipment. However,as a newcomer to a very old subject I would like to understand fully the basics of theodolite operation.

RE: Topcon TL20Df tripod attachment approximately 33mm female thread.

Quote:

I understand it to be somewhat odd but the optical plumb to the datum is viewed through the connecting screw.

That's to ensure that you are directly over the monument whose datum you are planning on using. However, there are lots of other measurements for which aligning to the ground datum isn't necessary. We've used theodolites for decades, but only indoors and only for relative measurements, so we've never used anything related to datum plumb, only the autoleveling.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close