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Getting Started - Survey/Leveling Equipment Needed?
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gpsdude
Posted 1/31/2025 11:43 (#11082282 - in reply to #11082137)
Subject: RE: Getting Started - Survey/Leveling Equipment Needed?


NE South Dakota Clark, SD
andya - 1/31/2025 10:12

gpsdude - 1/30/2025 21:12

Have you tested the vertical accuracy over an extended timeframe of the CORS network? If not, do that first or plan for an in field base. Minimum of 24 hour log so you can plot the amount of elevation change. You may find after a couple hours, that no further logging is required as it moves too much.

GPS antenna receiver will have to be RTK unlocked. Minimum GPS and Glonass.

I have been around scrapers for quite a few years working with ditching, but I am not aware of what an auto-ejector is? Can you show an example?

If buying a used system, is there support available? If not beware. Be prepared to pay for support time.

Best of luck on your project.


Thanks for the advice. I haven't done any testing of the public data. Sounds like it is "not fit for purpose".

I'm probably not using the right term. When the dump location is reached the scraper pushes the dirt out. So I presume there are two things that need GPS control - the blade height and the ejection of the dirt.

Andy


I am not aware with any auto pushoff that is controlled by GPS grade control systems. They may be out there. When doing GPS controlled ditching, the best use of cut material is to fill depressions so ditches do not have to be as deep. In this case we can leave the scraper in auto control in the fill area so the blade runs at the fill elevation and manually dump the scraper. I am learning about land shaping and from what I have learned is that you move the majority cut fill with an ejection scraper, then switch over to a large box type scraper with side tilt control for final finish work. This will cut and fill as needed without having to pushoff.

Edited by gpsdude 1/31/2025 11:44
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