UpSide Down Scanners

[stevenramsey]

Following on from the posts http://www.laserscanning.org.uk/forum/v ... f=46&t=462 I thought I would start a new thread with the information people have been asking for.

The equipment needed to send a scanner (HDS6000 or 5006) down a hole is listed below and can be purchased directly from the makers. This system replaces the tribrach with a purpose built adaptor so please note Do Not Use With A Tribrach

The dolly in itself looks like a useful addition to the tool box.

Heavy duty aluminium tripod with elevating rope device, including 1pc. basic
tube (85cm) and 4pcs prolongation tubes (85cm) and safety top cap. The
tripod has together with the scanner a reach of ~ 3,20m underground.
In this configuration a scanner base plate for the HDS6000 (which has to be
exchanged with the standard base plate) and a support system for overhead
application is included.
The whole system folds together to ~120cm length
Art.-no.: 400138/400152

Tripod dolly triangle shaped, foldable made of stainless steel.
Art.-no.: 400134

Screwdrill with 2pcs. rechargeable batteries (for electrical up and down
transportation of the scanner) with connecting nut for the am. tripod and
hand crank for hand operation.
Art.-no.: 400160


Gottlieb Nestle GmbH
Vermessungsgeräte
Postfach 1180
72276 Dornstetten
Tel.: 07443 / 9637-0
Fax: 07443 / 9637-50
E-mail: bernd.nestle@g-nestle.de
Internet: http://www.g-nestle.de

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[Phill]

Thanks to all for their replies.

Will keep the upside down tripod suggested by Steve in mind. Any idea on the price? Ball park, not a quote. Looks like we are going to be able to do the work in a shutdown when the hopper will have scaffolding in it.

Cheers

Phill

[Jason Warren]

very interesting Steve,
do you have any idea on costs?

cheers

[danielgadowski]

Steve,
do they use a hand drill to move the scanner up and down?? This looks a little bit strange...
Thanks for all the info!

[stevenramsey]

Hi All

Yes it uses a small hand drill to raise and lower the scanner on the cables before clapping off the rod.

As for the price I do not have any information as Leica in the UK are not stoking this item.

You can either contact the manufactor directly (details in thread above) or contact you local Leica Representative to see if the can source or supply.

personally I would contact the manufacture.

[JLarson]

Reviving this post: Has anyone purchased one of these and used it? How was it? We're getting ready to survey 200+ manholes at JFK and I'm seriously considering going with something like this.

[Majid_noori]

Reviving this post: Has anyone purchased one of these and used it? How was it? We're getting ready to survey 200+ manholes at JFK and I'm seriously considering going with something like this.

Hi Jason,

A friend of mine, Mike Annear, has used this tripod for scanning a vessel, you may contact him on mike@mikeannear.com

Cheers
MAJID

[christopherbyrne18]

Hey Guys,

I have also used this Nestle tripod quite a bit. My previous company Coastway in Ireland have one and I use one over here in Perth Australia for an ongoing project. I'm happy to answer any questions.

Cheers,

Chris

[Phill]

Hey all

We have used the above tripod on a few jobs now. It works well, and we get reasonable results. The problem is aways running control down a manhole, always a challenge. There is also the stress of watch 200k hang off three 5mm bolts. It does wobble around a bit and i have been trying to think of a way to brace it at the bottom off the trolley, but it seems to spin quite stable once it settles. I always get good result on the surface targets, but it is only lowered to about 1.5m. I havent dropped it more than about 2.5m so far.

Hey Chris, you wouldnt know anything about the red dust all over our one would you?

Cheers Phill

[christopherbyrne18]

Hey Phil,

There’s lots of red dust in Perth, the stuff gets everywhere....

We are using a HDS6200. I have no need for control in what I am using it for at the moment but in the past I used it for manholes and just did a scan above the manhole while inverted and used the b&w targets to control this. Then I would lower the instrument and capture a second scan down the manhole. I would then cloud match the lowered scan onto the first. This worked very well but is obviously limited by how deep the manhole is and what you can see from up above to give you sufficient overlap.

I have lowered it right down to the max which I think is 5m. You do have to give it some time to settle before starting the scan as it’s like a large pendulum.

I too was initially nervous about dropping a scanner down but you get over it and it is a German engineered piece of kit.

Tips:
(1) Get a good drill (18v) with a spare battery (lithium) if you are doing a lot of scans as raising & lowering chews the juice.
(2)Keep an eye on the cord at the rotating part of the lowering mechanism. If you try to lower of raise too fast it can come off the spool and tangle up which is not nice
(3) Keep the lowering mechanism well greased. On day where we have used it a lot it has ceased and needed greasing. Stick to a lower speed for raising / lowering.

Cheers,

Chris