If you think about how a transit is built, the scope is supported by a "tower" of sorts on each side of the instrument. If those "towers" are not perfectly built (and they are not) the crosshairs of the scope will not be absolutely perfectly centered on the instrument. So - when you look at your backsight for shot #1, imagine your scope has a built in lean of just .001 inches to YOUR left. That's a minute amount, but it magnifies when you flip the scope to give your helper a point. His #1 mark will be shifted to HIS left a little bit. (Remember - he is facing you) Next you rotate the instrument to take your #2 shot. By rotating the instrument, your built in lean is now .001 inches to YOUR right. When you flip the scope to give your helper his #2 shot, his #2 mark will be shifted a little bit to HIS right. That's what we call a split. You have two marks on the top of the stake, so you divide the distance between the marks by two and drive a tack at the midpoint between his #1 & #2 marks. I must say that this would be a high and unnecessary level of accuracy for most fence work.
It is a little confusing to explain, but basically what you are doing when you double center is you are compensating for the built in error that every transit leaves the factory with. Transits have a lot of adjustment points on them, but I have never seen one that was adjusted so well that it would not split on a double center.
When I staked fences for neighbors and friends, I tried to get them to have the tee posts scattered along the line. Once you have the transit set up, you can align the posts as they drive them. They are always surprised when I ask them if they want the nub side of the post on the line or the back side of the post on the line. They are thinking "within an inch or two", but we have the capability to be right on the money.
I want to stress again - this is THEIR fence line. They chose the points to start and end from. I'm just connecting the dots.
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
