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Re: Chooch's 3D printable laser cutter
Posted:
Mon Jul 25, 2011 10:45 pm
by trwalters001
This is a great idea!
However, if you use 2 line-generator lasers, 90 degrees to each other, they'll cross at the focal point whatever distance you're focusing at.
Tim
Re: Chooch's 3D printable laser cutter
Posted:
Mon Jul 25, 2011 11:13 pm
by bdring
The idea is to use dots. This way it will also allow you to set the focal length too. Cross hairs only work in 2 dimensions.
There is only one point in 3D space where the dots overlap.
Re: Chooch's 3D printable laser cutter
Posted:
Tue Jul 26, 2011 9:29 pm
by Hassi
hi, i tryed to combine each idea of you.
ended with this:
its only shematic
Re: Chooch's 3D printable laser cutter
Posted:
Tue Jul 26, 2011 10:06 pm
by bdring
Two lines and a dot? I guess that would work.
One of the features of the two dots method comes into play if the beams are at a 45 degree angle. The distance between the dots is equal to the distance away from the focal point. Sometimes I like to focus below the surface at the middle. This could help you quickly estimate the middle.
The two lines and a dot might have a similar affect, but you do not need to converge the dots first. The crossed lines will give you the XY and the dot gives the distance to the Z.
Re: Chooch's 3D printable laser cutter
Posted:
Wed Jul 27, 2011 2:30 pm
by trwalters001
Bart wrote:The distance between the dots is equal to the distance away from the focal point.
Never thought of that...
*THIS* is why you get paid the big bucks!
Re: Chooch's 3D printable laser cutter
Posted:
Mon Sep 19, 2011 12:12 pm
by iGull
Hi
bdring wrote:The distance between the dots is equal to the distance away from the focal point.
Hadn't read this log before - this is the system that the 'Dambusters' used in WWII
Checkout ...
http://en.wikipedia.org/wiki/File:Dambstrajj.gifI guess a pair of lasers would have been slightly more accurate !
Cheers
Neil