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Does anyone know how self levelling 'laser levels' work?
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PlainName:

--- Quote from: tautech on March 01, 2022, 08:25:08 pm ---Leica and Topcon don't but this stuff is in another league to the cheap stuff on the market which is mostly garbage.

--- End quote ---

Easy for you to say, but:

https://www.laser-measure.co.uk/leica-disto/leica-lino-l2-plus.html
tautech:

--- Quote from: dunkemhigh on March 01, 2022, 09:52:17 pm ---
--- Quote from: tautech on March 01, 2022, 08:25:08 pm ---Leica and Topcon don't but this stuff is in another league to the cheap stuff on the market which is mostly garbage.

--- End quote ---

Easy for you to say, but:

https://www.laser-measure.co.uk/leica-disto/leica-lino-l2-plus.html

--- End quote ---
Yep easy as any construction grade laser I've used didn't have travel locks.
This sort of stuff:
https://www.tradesurvey.co.uk/product-category/levelling-and-line-lasers/rotary-lasers/
jpanhalt:
Before anyone runs out to buy that Leica, the battery case is crap.  After a short time, the cover broke, can't be repaired, so I hardwired a workaround (rechargeable external batteries).  It doesn't even have rechargeable batteries!
PlainName:

--- Quote from: tautech on March 01, 2022, 10:06:23 pm ---
--- Quote from: dunkemhigh on March 01, 2022, 09:52:17 pm ---
--- Quote from: tautech on March 01, 2022, 08:25:08 pm ---Leica and Topcon don't but this stuff is in another league to the cheap stuff on the market which is mostly garbage.

--- End quote ---

Easy for you to say, but:

https://www.laser-measure.co.uk/leica-disto/leica-lino-l2-plus.html

--- End quote ---
Yep easy as any construction grade laser I've used didn't have travel locks.
This sort of stuff:
https://www.tradesurvey.co.uk/product-category/levelling-and-line-lasers/rotary-lasers/

--- End quote ---

OK, well you are talking about a different thing there. Recall that I said:


--- Quote ---If they can move they can be rattled until they fall apart
--- End quote ---

The stuff you are talking doesn't have loose stuff to rattle - they are motor-controlled hence not free-floating pendulums amd don't rattle. You can verify that since when the level is manually adjusted it allows you to set it on a slope and then adjust via up and down buttons.

Further, if they did have free-floating pendulums, for the price you would expect the things to automatically lock when you turn off the power. Take one and shake it to see if there is any rattling. I would put money on the answer being 'no'.
tautech:

--- Quote from: dunkemhigh on March 01, 2022, 10:32:12 pm ---The stuff you are talking doesn't have loose stuff to rattle - they are motor-controlled hence not free-floating pendulums amd don't rattle. You can verify that since when the level is manually adjusted it allows you to set it on a slope and then adjust via up and down buttons.

--- End quote ---
Most rotary lasers have 3 adjustment knobs so to get the laser level enough for autoleveling to work.
Those that have up/down buttons are different beasts, they are gradable lasers and used in commercial pipe laying and sometimes small scale earthworks however GPS systems have become more popular as models can be uploaded into a GPS system to set the limits of an excavation.
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