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Leica says >20m for the tilting axis.
https://www.manualslib.com/manual/1485224/Leica-Ts13.html?page=53#manual
Though I suspect using minuscule targets and ensuring good repeatability mean that??s a fairly loose requirement.The trunnion axis collimation is just adjusting for how far off horizontal the gun turns when looking high or low from 90 degrees. The only requirement for distance is the quality of sighting a target. You can be set up anywhere and effectively do the trunnion axis collimation as long as you are precise in your sighting of a target. Like others have said, something on the ground works just as well as setting up near a building and sighting high.
If you do not sight things with a high or low zenith angle then not doing this collimation will have minimal effect on the angles you collect.
The targets I’m using are usually smaller that the cross hairs. At 20 m out you need ~ 10 m difference in height which can be done on a 2 story building if you can find well defined targets.
- Posted by: @lukenz
I’m running a 2″ Geomax Zoom90 (basically a Lecia TS15/TS13) and of course the dealer says it should be sent back for calibration/service once a year. I’ve worked for places that do just that and places that only send the gun into the dealer if it gets dropped.
I’m the only user who baby’s it and lucky if it get a full day of work a week. My question is do they really need to go back each year? Particularly interested in other Lecia/Geomax users experience.
Also for Lecia/Geomax users how often do you go though the check and adjust routine? Also where do you find something tall enough to point at for vertical angle?
I’ve always put it off thinking the dealer calibration ought to be the best and if my pointing is not perfect with the check and adjust routine then I could put it out more? Typical my left/right face horizontal angles are within a couple seconds but the vertical split is often ~8″ which always seems to have been that way.
Id take it back only if the field calibration shows angular differences of more than 15″ between 2 calibrations. My 1″ zoom 90 didn’t see the dealer since we purchased it and it still works well after 5 years giving us consistent results.
- Posted by: @350rocketmike
The Leica 1203+ is still harassing me because I did all the adjustments except tilting axis because I’m never set up anywhere it can be done. I have to specifically search out something I can sight.
The Trimble routine definitely takes less time because of this not being part of it, but maybe doesn’t accomplish as much.
Seems like Trimble s series in general don’t value accuracy as much as Leica, since they build a robot that’s basically useless without the active prism which is inherently less accurate to begin with.
I do the tilting axis this way: try to find a tiny piece of quartz, or other dot small enough that you can center the cross hair on, about 5′-6′ away from the instrument. Focus and center on it and press the button. It works pretty well. I had to transfer control on tall structures at around 30 deg angle so I needed to figure out a way to calibrate the tilting axis beforehand.
- Posted by: @ramsesPosted by: @350rocketmike
The Leica 1203+ is still harassing me because I did all the adjustments except tilting axis because I’m never set up anywhere it can be done. I have to specifically search out something I can sight.
The Trimble routine definitely takes less time because of this not being part of it, but maybe doesn’t accomplish as much.
Seems like Trimble s series in general don’t value accuracy as much as Leica, since they build a robot that’s basically useless without the active prism which is inherently less accurate to begin with.
I do the tilting axis this way: try to find a tiny piece of quartz, or other dot small enough that you can center the cross hair on, about 5′-6′ away from the instrument. Focus and center on it and press the button. It works pretty well. I had to transfer control on tall structures at around 30 deg angle so I needed to figure out a way to calibrate the tilting axis beforehand.
That sounds like a great solution for me. I find small quartz rock lying around quite often in some areas around here. I should know this but what robot are you doing this with? I still have both the Trimble s5 and Leica 1203+ in the truck. Trying to switch over to permanently using the s5 because our company is switching over to all Trimble (no idea why?) But the Leica is definitely still the better robot. The only upside to the Trimble is using it with the r10-1 on VRS network, not having to transfer coordinates into a different data collector.
Edit: sorry I see your using a zoom 90. I wish I had asked my boss for one of those. Would have been a slight upgrade from the TCRP1203+ and worked well with Fieldgenius and the Panasonic tablet.
Rather pleased with all the helpful responses. Great to hear what everyone else is doing so to all who chipped in thanks a bunch. Gives me as a solo operation (and more at the perfectionist end of spectrum) some comfort about my current approach!
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