Land Surveyor Forum

Replies

• Vendor

  Troy Deaton May 20, 2018 at 8:56am

  The SRX has a field collimation process that can correct this issue. Setup prism about 300ft away and go to the configuration/collimation IMAGE-SENSOR is normally the last in the list. Sight prism center and press measure and it will do an electronic adjustment for the offset. This is a document for the SX/PS series and is very similar.  http://nebula.wsimg.com/18b0241bd61539dc3b4da3ab189427bf?AccessKeyI...

  http://nebula.wsimg.com/18b0241bd61539dc3b4da3ab189427bf?AccessKeyId=E3BCFA33DB0DCFD90C15&dispositi…
  • 

    Ivan > Troy Deaton May 20, 2018 at 10:06am

    Good explanation, it is not an error, it is the way the station works, moreover you can check the accuracy of your targets looking the residuals of your resections, and the results of your backsights
    • Land Surveyor

      Carlo Alberto Birocco > Ivan May 20, 2018 at 6:18pm

      Nimal,

      what Ivan and Troy wrote above is absolutely correct.

      Due the image processing, your SRX achieves better accuracy in angular measurements.

      This is an AP1 image from SRX camera during a service inspection in my lab:

      

      Sorry for image quality, but I took this picture with a poor camera ...

      I suggest You, use a circular prism (like AP1, for instance), because the autopointing system can work better on a circular shape.

      Obviously, your gun must be fine adjusted. With "Settings" menù, You can perform CCD calibration. It isn't too difficult but, if You are not enough skilled, it's better ask for Sokkia's service.

      Greetings!

      Carlo Alberto
• 

  Ed DeSaulniers May 20, 2018 at 8:11am

  How did you determine there was a difference? They robot will only mechanically turn near the target and once the target is close it will only fine tune electronically. So the cross hair will not necessarily be lined up on the ATP1. Also when using the ATP1 prism for accurate measurements you must point one of the nubs on the top or bottom of the prism towards the robot.
• 

  Ivan May 19, 2018 at 9:11pm

  Hi, I copied this comment from my Sokkia SRX manual, hope it helps

  Search operation during Auto Pointing

  2.

  When the target enters the field-of-view within the set time limit for Auto Pointing completion,

  the SRX stops moving and the offset between the target and telescope reticle is added to the

  angle measurement value obtained from the encoder and compensated using image processing

  calculation. Although this compensation reduces measurement time and increases search

  accuracy, there is a possibility that the target and telescope reticle appear to be misaligned.

  Compensated values are displayed in blue.

  If the SRX is rotated (manually or u~ing the jog dials) more than 1 0", compensation will be

  canceled, the angle reverts to that obtained from the encoder, and the angle values are once

  again displayed in black. Compensation is automatically performed when performing Auto

  Tracking. Terminating Auto Tracking or powering OFF the SRX will cancel the compensation

  function .
• 

  Benjamin J Everett May 19, 2018 at 8:48pm

  It’s a radio link collimation. I would do a zero point collimation on the zenith as well.
• Land Surveyor

  Stephen B Newbill May 19, 2018 at 6:55pm

  There is a difference between the electric eye and manual sighting. And there is a calibration for it. The robot should know when you are manual sighting and electrical sighting. The manual should help you find it... Typically you will get better results if you gonna use tracking or electric sighting to trying to use only that in a job, instead of switching back and forth
• Land Surveyor

  Nicolas May 18, 2018 at 10:06am

  Have you calibrated your station recently?