I'm running a SOKKIA SRX with SurveCE on Carlson Surveyor+ data collector. We mainly do Urban/ Semi-Urban cadastral surveys. In one man operation tried to use Robot mode. I've setup a tripod and set the ATP1 360 prism for backsight & foresight. In TRACKING & SEARCH modes the gun locks to slightly off the visible centre towards right. For 100-150m it's about 10-12 seconds. Approximately for 150m - 7mm, for 100m - 5mm, for 50m- 2mm off respectively. If I set 0.0000 for backsight, after locking it becomes 0.0010 - 0.0012 approximately. I need to measure it more accurately as they are my traverse lines. Even in most cases we run open traverses for detail pickup. Tried with two different ATP1 prisms but ended up with the similar results. Then I tried without the data collector but with the gun on SEARCH mode got same results. Again tried with -30mm standard prism got similar resuls. Could anybody give me a hint about that??ÿ
Many robotic instruments, when tracking a prism, particularly passive, will offset the crosshairs from the prism center.?ÿ Our Trimble SPS930s will offset up and to the left a bit when tracking.?ÿ The robot knows what the offset is back to the prism to give you the correct position.
Just curious why you use the?ÿSPS930s , isn't that the construction version designation?
Yes, my "9-5" weekdays, I work for a heavy highway / site construction company building 3d grading models. We have SPS930s that we use for motor grader control and when not utilized in that function, our party chiefs collect data with them when better accuracies are needed versus RTK.
The SOKKIA SRX does not turn directly to the "center" of the prism, it just gets close enough for it to calculate the v and h offsets and applies them to the "measured" information reported to the DC and to the Display. This makes target acquisition faster and is just as accurate. This really bugged me at first, but that was just because I wasn't trusting the equipment and thought that I'd "check" to see if the cross hairs were on the "center" of the glass...they almost never were. After several calls to various SoKKia service techs it was finally explained to me. If you want to do a quick check let the robot track and record an angle to a close glass then adjust the alignment manually to hit the center of the glass and record that, I think that you will be surprised at how close the numbers are.
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RRain
Same experience and same story with Leica.?ÿ
Most modern robots will not prism center and will compute to prism center by position of strongest reflective signal. This extends the life of the servo motors rather than constantly moving the crosshairs in cases of very slight movements.
Look through the manual there is a setting for to have it track prisim center it is a little slower also try running a tilt and collimation and a image sensor reticle offset adjustment
Look through the manual there is a setting for to have it track prisim center it is a little slower also try running a tilt and collimation and a image sensor reticle offset adjustment
At a previous employer I was quickly dubbed the "Trimble guru".?ÿ Why you ask??ÿ I read the manual...go figure.
