The foot screws on the tribrach were some way off the central position before he started. Better to be central so you have equal opportunity for adjustment both ways on each screw. Also when checking the plate bubble, adjust the foot screws in both planes (x and y) to ensure the instrument is positioned level. Nice simple video for beginners.
yup, the video only showed leveling the plate bubble in one direction, parallel to the 2 foot screws. It should demonstrate as well the turning of the instrument 90 degrees, more or less, and leveling the plate bubble along that second axis using the 3rd foot screw. Then check again through the optical plummet if its crosshair already coincides with the mark on the ground. And if not, release again the instrument's tribrach and move it while aiming for the optical plummet's crosshair to coincide with the mark on the ground. Lock the tribrach up and repeat the leveling process on both directions until you check that the optical plummet's crosshair coincides with the mark.
Yes, you are correct. You should always start with the screws in the neutral positions. More than that, the screws should have already been in the neutral position when you put it in its case. The above method is for amateurs!(see my comment above).
You wanna save a bunch of time...???? Set up over the pin looking through the down periscope. Don't even think about touching the screws yet. The bullseye bubble is just to get you close the critical vial is what you want to be gospel when you can spin it round & the long vial(critical vial) Remains spot on level through 360,780 etc are you ready to go but we're not there yet. Next use the legs to get level w/the bubble just fast & dirty. Check down scope for set up move if necessary. If you start turning dials @ this point it will move far from its mark & you'll be repositioning it all damn day. After leg leveling & the bubble seems to stay in its circle your still not there if the critical vile isn't spot on through rotation but real close now use the dials for fine tuning & last positioning. & when leveling 1 leg & 1 dial you should never move. It's on 3 legs & has 3 dials use two legs to level up to one leg and two dials to level up to the dial that was over the stationary leg. I'm no professor at this just years behind one laying out commercial buildings as a carpenter. When everybody's screaming for layout lines on the site time needs to be saved without throwing down dirty layout or a busted grid. Layout personnel need time backcheck their work or it's gonna be the curly shuffle
Bill, agree, however, a plumb bob and a torpedo level ( high quality) is better. this allows one to center over pin and level top of tripod. saving tons of time.
A quick question, if you know the answer... I have a theodolite with a laser plummet. However, the tripod has a plumb bob hook inside the tripod screw. This works well for when I attach a plumb bob. However, this interferes with the laser dot which becomes quite blurry and poorly defined. What do people do in this situation?
@@christophertierney6600 Only in the same way that I can swap out my laptop's hard drive for another... (not easily or quickly). In the end I removed the plumb bob hook with the intention of returning it to the tripod screw... but this action certainly damaged it (the way it was attached suggested it was not designed to be removed). A separate tripod screw (with shipping) was almost the same price as a new tripod. So, the solution I have adopted is to have 2 tripods.
@@christophertierney6600 I wasn't too worried about the price. Bonus was that the theodolite was new but old stock (still sealed) and I got it 50% off retail. So swings and roundabouts.
When using the plate level, you also need to rotate 90 degrees, and level ( with the 3rd screw only), and repeat, until level both ways, and still over the point.
With all due respect, if you worked for me, I wouldn't let you touch a theodolite! I would use you as a rod man. I have been working in surveying for more than fifty years(yes, I am old) and am still working. No self-respecting instrument man would set up like this. First, we use a light weight plumb bob while setting the tripod for rough centering(the tripod should have a plum bob clip to hand the plum bob). Then we level the instrument COMPLETELY, otherwise it would be folly to use the optical plummet. The instrument must be leveled in BOTH directions, not just one as you did. Then we use the optical plummet for fine adjustment over the point. Then we level again and check again. Usually, that is enough. The entire process should take no more than half a minute or so. People on the job don't want to wait around while you fiddle. I will give you credit in that this seems to be the inane method currently taught to unsuspecting students. By the way, fifty years ago we used steel circle transits with no optical plummet, just a heavy plum bob. I could set up perfectly in around thirty seconds(even in the wind). The world record was around ten seconds!(Yes, there were competitions!). So, let's stop using this "modern" insane method and use what professionals use: a plumb bob for the rough setup.
I usually use a dot lazer it's a little bit faster for me to center the legs. And I use a torpedo to get the legs level before I even put on the theodolite.
I do not understand??? This process was taught in class as well. I highly disagree. A torpedo level and plumb bob is required. Correct process. 1. extend legs and place level on top of tripod, and level 2. hang plumb bob and move over pin 3. recheck plumb bob level 4. connect Theodolite and check level and pin The problem with the way which is shown in the video is that the base for the theodolite is not level. So when our engineer in the video used the plumb sight to get over the pin, he was still off with his levelness of the base, which is a big issue. Time, it is a waste of time. efficiency is required. I argued with my classmates about this and they disagreed. However, they are wrong, this video is wrong, and I am correct. I know that my way is correct. Furthermore, when our engineer slides the theodolite to center over the pin, his levelness will be thrown off, because his base is not what? correct, is not level. thus this videos process is just fighting a losing battle. I am a bricklayer and this is how any bricklayer would perform this task. thanks.
If you start with an instrument that's pretty close to zeroed, you can eyeball the top of the tripod level. The leveling screws got plenty of stroke you don't need to fuck with the torpedo . It's redundant. You're going to have to use the leveling knobs anyway.
Is it possible to get a transcript of these videos? Dave's speech impediment makes it a little difficult to understand what he says sometimes, and I'm rewinding and replaying the video over and over to try and decipher it. Very confusing.
Shout-out to everyone watching this over and over again in surveying class
I’m a construction worker. But plan on being a manager or foreman. So this is key when you Wana move up in the ranks.
beautiful invention
It's very helpful for me here in Nigeria
thanks it helped a lot .... can you provide with any guide book or leaflet where one can learn about total station survey. Thaks again
Thank you for the video
congratulations
seldom use theodolite except if you need need a second instrument for observing angular intersection for the purpose of monitoring verticality
I suggest of a better camera angle while you are doing adjustments.
Thanks you sir. I'm new and I hope it's will give me a lot experience in future .
Sahi kaha bhai
Would you not use a plumb bob to accurately place the instrument?
Thanks sir
The foot screws on the tribrach were some way off the central position before he started. Better to be central so you have equal opportunity for adjustment both ways on each screw. Also when checking the plate bubble, adjust the foot screws in both planes (x and y) to ensure the instrument is positioned level. Nice simple video for beginners.
yup, the video only showed leveling the plate bubble in one direction, parallel to the 2 foot screws. It should demonstrate as well the turning of the instrument 90 degrees, more or less, and leveling the plate bubble along that second axis using the 3rd foot screw. Then check again through the optical plummet if its crosshair already coincides with the mark on the ground. And if not, release again the instrument's tribrach and move it while aiming for the optical plummet's crosshair to coincide with the mark on the ground. Lock the tribrach up and repeat the leveling process on both directions until you check that the optical plummet's crosshair coincides with the mark.
Oh you need
Bobs or veganas
Yes, you are correct. You should always start with the screws in the neutral positions. More than that, the screws should have already been in the neutral position when you put it in its case. The above method is for amateurs!(see my comment above).
This thing is still a pain in the ass to setup
Are all digital theodolites as simple as this one? What make and model is it?
topcon DT-200
You can also get "Total Stations" they record measurements on site and download the site measurements.
You wanna save a bunch of time...????
Set up over the pin looking through the down periscope. Don't even think about touching the screws yet.
The bullseye bubble is just to get you close the critical vial is what you want to be gospel when you can spin it round & the long vial(critical vial)
Remains spot on level through 360,780 etc are you ready to go but we're not there yet.
Next use the legs to get level w/the bubble just fast & dirty. Check down scope for set up move if necessary. If you start turning dials @ this point it will move far from its mark & you'll be repositioning it all damn day.
After leg leveling & the bubble seems to stay in its circle your still not there if the critical vile isn't spot on through rotation but real close now use the dials for fine tuning & last positioning. & when leveling 1 leg & 1 dial you should never move. It's on 3 legs & has 3 dials use two legs to level up to one leg and two dials to level up to the dial that was over the stationary leg. I'm no professor at this just years behind one laying out commercial buildings as a carpenter. When everybody's screaming for layout lines on the site time needs to be saved without throwing down dirty layout or a busted grid. Layout personnel need time backcheck their work or it's gonna be the curly shuffle
Bill, agree, however, a plumb bob and a torpedo level ( high quality) is better. this allows one to center over pin and level top of tripod. saving tons of time.
Yes
A quick question, if you know the answer...
I have a theodolite with a laser plummet. However, the tripod has a plumb bob hook inside the tripod screw. This works well for when I attach a plumb bob. However, this interferes with the laser dot which becomes quite blurry and poorly defined. What do people do in this situation?
Stupid answer - Can you remove the plumb bob hook from the tripod?
@@christophertierney6600 Only in the same way that I can swap out my laptop's hard drive for another... (not easily or quickly). In the end I removed the plumb bob hook with the intention of returning it to the tripod screw... but this action certainly damaged it (the way it was attached suggested it was not designed to be removed). A separate tripod screw (with shipping) was almost the same price as a new tripod. So, the solution I have adopted is to have 2 tripods.
@@mathmandrsam Some lessons are expensive ones. Silver lining is having a second tripod?
@@christophertierney6600 I wasn't too worried about the price. Bonus was that the theodolite was new but old stock (still sealed) and I got it 50% off retail. So swings and roundabouts.
When using the plate level, you also need to rotate 90 degrees, and level ( with the 3rd screw only), and repeat, until level both ways, and still over the point.
With all due respect, if you worked for me, I wouldn't let you touch a theodolite! I would use you as a rod man. I have been working in surveying for more than fifty years(yes, I am old) and am still working. No self-respecting instrument man would set up like this. First, we use a light weight plumb bob while setting the tripod for rough centering(the tripod should have a plum bob clip to hand the plum bob). Then we level the instrument COMPLETELY, otherwise it would be folly to use the optical plummet. The instrument must be leveled in BOTH directions, not just one as you did. Then we use the optical plummet for fine adjustment over the point. Then we level again and check again. Usually, that is enough. The entire process should take no more than half a minute or so. People on the job don't want to wait around while you fiddle. I will give you credit in that this seems to be the inane method currently taught to unsuspecting students. By the way, fifty years ago we used steel circle transits with no optical plummet, just a heavy plum bob. I could set up perfectly in around thirty seconds(even in the wind). The world record was around ten seconds!(Yes, there were competitions!). So, let's stop using this "modern" insane method and use what professionals use: a plumb bob for the rough setup.
Only noobs need a plumb bob for rough set up!!
I usually use a dot lazer it's a little bit faster for me to center the legs. And I use a torpedo to get the legs level before I even put on the theodolite.
A plum bob, is that like an apple bob ?, bobbing for apples, that is.
i guess what he could have done wrong is doing the leveling out of order
need to work on setting things up. there are better methods than whats shown here
I agree, like using a torpedo level and plumb bob.
I do not understand??? This process was taught in class as well. I highly disagree. A torpedo level and plumb bob is required.
Correct process.
1. extend legs and place level on top of tripod, and level
2. hang plumb bob and move over pin
3. recheck plumb bob level
4. connect Theodolite and check level and pin
The problem with the way which is shown in the video is that the base for the theodolite is not level. So when our engineer in the video used the plumb sight to get over the pin, he was still off with his levelness of the base, which is a big issue. Time, it is a waste of time. efficiency is required.
I argued with my classmates about this and they disagreed. However, they are wrong, this video is wrong, and I am correct. I know that my way is correct.
Furthermore, when our engineer slides the theodolite to center over the pin, his levelness will be thrown off, because his base is not what? correct, is not level. thus this videos process is just fighting a losing battle.
I am a bricklayer and this is how any bricklayer would perform this task. thanks.
If you start with an instrument that's pretty close to zeroed, you can eyeball the top of the tripod level. The leveling screws got plenty of stroke you don't need to fuck with the torpedo . It's redundant. You're going to have to use the leveling knobs anyway.
芝浦の課題でみにきてる人いいね
he's doing this ass backwards, I would sequence this differently
Can you send me a video of how you would do it then?
I believe so too. Taking alittle too long to set up.
Is it possible to get a transcript of these videos? Dave's speech impediment makes it a little difficult to understand what he says sometimes, and I'm rewinding and replaying the video over and over to try and decipher it. Very confusing.
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We are here
WE NEED WOMEN SANITATION WORKERS!
WE NEED MORE WOMEN MAKING MORE SANDWICHES!!!
This is so outdated....
Please dont try to learn the correct method from this video.