I have a pretty simple question:?ÿ when doing a "check & adjust" and you come to the "tilting access" deal where you have to sight a target at a steep angle manually - Do you have to use a prism target like is shown in the manual - or can you just use a mark??ÿ?ÿThis concerns a Leica 1205 robot. ?ÿThanks in advance, Tom
Sorry! (smh) I meant to say "tilting axis" but on Saturday morning it came out tilting access (whatever that is.)?ÿ?ÿ Speaking of smacking my head- the angle you have to take must be 27?ø above or below horizontal and on my robot I almost can't get my eye under the eyepiece.
No prism required, but finding a suitable target can be challenging.?ÿ I usually do it when I'm working near a tower of some sort.?ÿ Set up high!
Nope, no prism is require. Church steeples , power plant smoke stacks, maybe a transmission tower.
Good news! Set up high? That's easy for you to say!
J/k!!! Couldn't resist that one. Thanks for your help it makes so much easier.
Thanks Steven!
For tilting axis calibration, find a grain of quartz small enough on the ground around you, maybe 6' away from the instrument (that will give you the angle), focus and aim at the center of it. I use the quartz because it is white and gives you a good contrast with the crosshairs and because you can find it almost everywhere, in asphalt, concrete, dirt, etc. In winter I use small ice/ snow crystals as targets with dirt in the background for contrast. I do daily calibrations without the ATR and bi-weekly with ATR. The most important calibration you should do daily if you require a decent accuracy is the l,t compensator calibration. Leica robots can calibrate the compensator independently, unlike the new Geomax robots, so hit the l,t before you start measuring anything.
I was told to put a quarter on the pavement 6?? in front of the instrument then aim at Washington??s nose but then I read the instructions and it said the target should be at least 50?? away.
This is the Trimble S series, don??t know about Leica instructions.
I usually can find a target on an ordinary utility pole up high enough.
The reason for choosing a target far away is to reduce the effect of centring error (I think). I use a (sharp) pencil cross on a bridge bank seat (abutment) and set up at the bottom of the embankment. Can just get the 27 degrees of inclination required but its very hard to sight without a diagonal eyepiece, especially if you go steeper