The Shop > Tools
Anybody build Dan Gelbart angled laser centre finder?
Arbalist:
I've seen something similar before somewhere and in spite of what's been said it looks like it would be a useful addition to my tooling. I didn't realise until seeing the video just how useful it could be to me so it looks like I'll be trying to source a suitable (focusable) laser at some point. If anyone has any more useful links please post away!
Fergus OMore:
--- Quote from: Arbalist on March 23, 2015, 08:30:13 AM ---I've seen something similar before somewhere and in spite of what's been said it looks like it would be a useful addition to my tooling. I didn't realise until seeing the video just how useful it could be to me so it looks like I'll be trying to source a suitable (focusable) laser at some point. If anyone has any more useful links please post away!
--- End quote ---
Might I suggest that you read my bit in 'All Squared away'?
Cheers
Norman
Arbalist:
It's a minefield out there. Crosses, lines, dots, blue, red and green...
Is this one any good do you think?
http://www.ebay.co.uk/itm/20mW-405nm-Violet-Blue-Laser-Diode-Module-w-Driver-Focusable-2-/151235760143
PekkaNF:
--- Quote from: Arbalist on March 23, 2015, 09:34:06 AM ---It's a minefield out there. Crosses, lines, dots, blue, red and green...
Is this one any good do you think?
http://www.ebay.co.uk/itm/20mW-405nm-Violet-Blue-Laser-Diode-Module-w-Driver-Focusable-2-/151235760143
--- End quote ---
It is a minefield there....If I rememeber right, human eye is more sensitive to green light than red and 5mW is considered "safe" if you blink naturally and are not sighting straight.....then again it does not show on lit room (or work lights on). 20mW sounds like could damage eyes on worst case scenario.
There are safety goggles and some goggles "improve" visibility of the laser light ray. But I'm pretty sure using safety goggle would be counter productive in this case.
Pekka
vtsteam:
I didn't mean to dis the devicein the video, just question the stated tolerance. And if the real world tolerance fits my particular practical tolerance needs, then it seems like it could be be useful to make and have at some point.
Unfortuntaely all the practical details are missing -- focusing, or non focusing, safe power level, etc.
In the video, the beam looked quite wide -- but maybe it was purposely non-focused to make filming it possible.
I do realize there also are some tricks that don't actually depend on beam width (like centerng on a round, where symmetry of pattern and/or unbroken vee at the perimeter is what is being looked for) but for simple edge finding, how much can the unaided human eye resolve? Seemed like in printers we used to imagine much over 300 dpi was seen as continuous. That's about 3 thou accuity? Or is there some reason we can distinguish finer with the laser light?
Like I said, I'm not saying it wouldn't be useful a lot of times, but I'd have fairly relaxed expectations of it.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version