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MT1000 prism fell to the ground – is it broken?
Posted by landmanjohn on July 20, 2019 at 9:32 pmI knew it might happen one day. I leaned my MT1000 against a wall and it fell in slow motion to the concrete. Doh!!!
Apart from a few scratches all seems okay. LEDs appear to be okay and no prism covers are cracked.
Is there anything I need to do to check its still in good working order?
rover83 replied 5 years, 2 months ago 5 Members · 7 Replies -
7 Replies
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If no diodes are broken, and all prism glass is intact, probably just check into existing control . The diodes, if broken, will throw off your vertical accuracy a bit, even if just 1 little diode is cracked or broken.
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Put it on a tribrach, shoot it, rotate till the next prism is lined up with the instrument, shoot again, continue until you have shots on each prism. Compare results.
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Posted by: @stephen-ward
Put it on a tribrach, shoot it, rotate till the next prism is lined up with the instrument, shoot again, continue until you have shots on each prism. Compare results.
I like that – great idea thanks
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That’s an interesting setup. Is this prism adaptable to other robots ( i.e Leica 1200 series)? I assume there is send/receive unit on the instrument end also.
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@beartow
It’s called Active Track and Trimble is the only one I’m aware of that uses that system. The MT1000 has a knob that allows you set the target ID from 1-8. Trimble Access has a field when you set up your prism that lets you specify the target ID. You could run up to eight Trimble robots on a single site without worrying about tracking the wrong prism.
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Okay, that makes sense. I thought the knob allowed channel switching like walkie-talkies. I would never have to worry about multiple prisms on a site, but active prism tracking would be nice. Especially on heavily wooded sites.
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In addition to Stephen’s suggestion, I would compare results between passive and active tracking mode.
Don’t forget about semi-active mode – the LEDs are used for tracking when moving, but when you take a standard measurement it will switch to passive mode for the shot, which will tighten up that precision. So if there seems to be an issue with the LEDs, use semi-active until you can get it replaced.
“…people will come to love their oppression, to adore the technologies that undo their capacities to think.” -Neil Postman
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