Chooch's 3D printable laser cutter

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Re: Chooch's 3D printable laser cutter

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
trwalters001

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Location: Atlanta, GA

Re: Chooch's 3D printable laser cutter

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.
Bart
"If you didn't build it, you will never own it."
bdring
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Re: Chooch's 3D printable laser cutter

hi, i tryed to combine each idea of you.
ended with this:

its only shematic
Hassi

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Joined: Mon Jul 18, 2011 10:59 am
Location: Bavaria, Germany

Re: Chooch's 3D printable laser cutter

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.
Bart
"If you didn't build it, you will never own it."
bdring
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Re: Chooch's 3D printable laser cutter

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!
trwalters001

Posts: 173
Joined: Sun Oct 24, 2010 10:08 pm
Location: Atlanta, GA

Re: Chooch's 3D printable laser cutter

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.gif

I guess a pair of lasers would have been slightly more accurate !

Cheers

Neil
EMOs are a sign of weakness ...
iGull

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Joined: Mon Dec 06, 2010 2:59 pm
Location: Edinburgh, Scotland

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