Homemade Targets?

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tadol
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Re: Homemade Targets?

Post by tadol »

Well, if it ain't seeing a Koppa target, then there is definitely a problem -

If the folks at Leica need to borrow a few targets to get it fixed, they're welcome to call me -

:D
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Re: Homemade Targets?

Post by Scott »

tadol wrote:
Wed May 08, 2019 10:17 pm
Well, if it ain't seeing a Koppa target, then there is definitely a problem -
If the folks at Leica need to borrow a few targets to get it fixed, they're welcome to call me -
:D
I wonder if it's the wavelength of the laser, the BKL360's unique gold-coated mirror*, or a combination of both, that is affecting reflectivity?
Would a different sphere coating (other than 'white') be of help, despite lowering reflectivity back to the sensor?

* 'These optics provide >96% average reflectance from 800 nm to 20 μm." (Similar spec.)
https://www.thorlabs.com/newgrouppage9. ... oup_id=744

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Re: Homemade Targets?

Post by ericguizzetti »

pilatquinton wrote:
Mon May 06, 2019 5:49 pm
I have now been scanning with the BLK360 for about 8 months now, and have learned a lot along the way. Registering scans with targets simplifies the workflow, and makes my scans accurate as ever....if Register 360 even picks them up. We have a series of homemade 2D targets (paper adhered to 6"x6" steel squares), and while they work great in some cases, they are practically useless in others. Register 360 simply doesn't want to pick up these targets, or if it does, it doesn't pick the correct center.

Is this just a case of our homemade ones not being "good enough"? The prices that these manufacturers charge for 2D targets is outrageous, and I have yet to find any evidence that the materials/process they use to make them will make them anymore successful than the ones we fabricated in our shop.

We have also been attempting to fabricate our own spherical targets for some time now, and have had zero luck in getting Register 360 to recognize them.

Have you guys made any homemade targets? What materials did you use, and how successful were they? Please post pictures as well, I'm really curious to see how different everybody's look!
sometimes you just need to use the Virtual target control and self label. I tested a bunch of targets and I have enterprise agreements with PCL, DPR, and now Turner and need them to work. I would love to make you some targets if you want.

Image Image

by the way the Grey ones suck. BLACK and White rule...
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Re: Homemade Targets?

Post by TimBennett »

Check out Target Mill for printing your own targets www.target-mill.com
Sure, I could draw them in CAD and number them etc., but Target Mill will generate sequentially numbered, or alpha labeled round or square, with custom text & logo and more. Well worth the $29! Plus you can do bar codes, QR codes & ring codes, pretty much any sheet size, 1 per sheet, 2 per sheet...
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Re: Homemade Targets?

Post by fobos8 »

Jason Warren wrote:
Wed May 08, 2019 9:06 am
For some projects its worthwhile having some targets printed on thin metal plate.
Image

The brass connectors on Reuben Heaton gauge boards are a useful accessory for using homemade targets with bank sticks and range pole supports.
Image

Lastly its always worth having some targets printed double-sided ;)
Jason where did you get these printed? - I'd like to get some

Regards, Andrew

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Re: Homemade Targets?

Post by Jason Warren »

Hi Andrew,

I had some A4 black and white targets printed on vinyl by City Signs:
Unit 20, Sherwood Energy Village,
Ollerton, Newark, Nottinghamshire,
NG22 9FD
https://www.city-signs.co.uk/

If you need targets printing on metal then I used The Original Metal Sign Company:
Raiseprint House,
Royd Way,
Keighley,
West Yorkshire
BD21 3LG
https://originalmetalsigns.co.uk/

Please note this was wayback in 2016...

Hope this helps.
Jason Warren
jason.warren[at]laserscanningforum.com

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Re: Homemade Targets?

Post by Phill »

Quinton

I realised after searching for it for a while that Id never posted the attached report. I had been PMing Wiktor with regard to a difference he was seeing with using spheres and other things with a P40 vs C10 instrument on this post https://www.laserscanningforum.com/foru ... 46&t=12300

I wasted far too much time writing and experimenting for this report. In short the result I came to, and the same conclusion as a few other posts on the forum that are floating around is: You can buy those cheap styrafoam balls from the craft shop, paint them black with a water based paint then paint white over the top of that and you have a very cheap sphere target thats good to 1-3mm. If you dont have the SNLL carriers, Id just tape them to a bit of large diameter metal tube.

While I am pretty spoilt at work and we have a pleathora of tilt and turn black and whites which are my go tos, every now and again I get the spheres out when all the other gear is being used, and i have to resort to our HDS7000.

Hope this is if some assistance

Phill

Ps other posts talking about spheres

https://www.laserscanningforum.com/foru ... res#p66489

https://www.laserscanningforum.com/foru ... eap#p37697

https://www.laserscanningforum.com/foru ... eap#p28238
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Re: Homemade Targets?

Post by fobos8 »

Jason Warren wrote:
Sat Jun 20, 2020 8:06 am
Hi Andrew,

I had some A4 black and white targets printed on vinyl by City Signs:

Hope this helps.
I'm not sure if this is an important consideration or not but is there a specific/minimum print resolution that is required for checkerboard targets?

Cheers, Andrew

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