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3D Laser Engraving Machine

Posted by Nathan_T 
3D Laser Engraving Machine
January 14, 2018 02:30AM
Hello everybody! Do anybody know projects for making 3D laser engraving machine?
[www.youtube.com]
VDX
Re: 3D Laser Engraving Machine
January 14, 2018 03:25AM
... if only for spamming, then forget it - this thread would be deleted soon eye rolling smiley

Otherwise - this are frequency-doubled NdYAG or fiberlasers with XY-galvoscanners, so a bit above actual DIY-priceranges ...


Viktor
Re: 3D Laser Engraving Machine
January 14, 2018 08:10AM
Did you accept the message as spam because there is a link to the seller? I just wanted to ask the community and gave this link as an example sad smiley
So, I should use this YAG laser (for example):
[www.ebay.com]
VDX
Re: 3D Laser Engraving Machine
January 14, 2018 08:25AM
Quote
Nathan_T
Did you accept the message as spam because there is a link to the seller?

... first post and a (possible comercial) link is the typical apperance of SEO-spammers (SEO = Search Engine Optimisation).

So if not for spamming, welcome!

The Nd:YAG-laser in your link is not frequency-doubled! - you can't mark inside glass with the 1064nm ... you'll need 532nm, what's the green in your first yt-link.

And this "frequency-doubling" is a totally different business ...


Viktor
Re: 3D Laser Engraving Machine
January 14, 2018 10:48AM
Sorry, maybe it's silly question. Why I can't use this laser:
[www.ebay.com]
If I know focal distance between focal plane and lens, I can make surface from dots. I understand that it will be too slow without XY-galvoscanners.

Edited 1 time(s). Last edit at 01/14/2018 10:55AM by Nathan_T.
Re: 3D Laser Engraving Machine
January 14, 2018 11:08AM
Cost to amount of power, It will take multiple passes to do what these will do.
Why go with a 200mw laser when you can have one of these.

1000mW~1200mW 450nm 445nmBlue Laser Module

High Power 2.5W 450nm Blue Laser Module TTL 12V Carving free Goggles

or for a little more this one

6W+ Laser Engraving Module

Edited 1 time(s). Last edit at 01/14/2018 11:10AM by Roberts_Clif.
VDX
Re: 3D Laser Engraving Machine
January 14, 2018 12:16PM
... if for "normal" engraving, then find more related infos in the specific sub-forum: [forums.reprap.org]

For 3D-marking inside of glass or other transparent materials you'll need even more power (or better energy density).

Maybe you can create some cracks inside of acrylic with one of the blue 6Watt-diodes with a "spot-creator", which will symmetrize the bad beam quality of the 6W-diode, so it can be focussed much better.

But for glass you'll need a pulsed laser with "peak energies" of some hundred Watts on a spot smaller 0,05mm diameter!


Viktor
Re: 3D Laser Engraving Machine
February 11, 2018 03:24PM
I don't need for making laser engraving machine on surface.
What can you say about this laser:
[www.ebay.com]

There is information about laser, what I found (in pdf file).
Does it suit for 3d engraving?
Attachments:
open | download - 201105_d2_en.pdf (292.8 KB)
VDX
Re: 3D Laser Engraving Machine
February 11, 2018 03:49PM
... not enough power and energy density for engraving eye rolling smiley


Viktor
Re: 3D Laser Engraving Machine
February 17, 2018 01:53PM
As I understand, it's 6W version of JENOPTIK JENLAS D2.3:
[www.ebay.com]
Also not enough power and energy density for engraving?


2. [www.ebay.com]
Does not fit wavelength of laser?
VDX
Re: 3D Laser Engraving Machine
February 17, 2018 03:30PM
... found a datasheet for the Jenlas D2.3 - [www.findlight.net]

3 (or 5?) Watts of green (532nm) on a spot of 0.05mm would be enough to engrave dark plastic or other good absorbing materials, but for engraving inside glass you'll need much higher energy densities! This is mostly done with pulsed lasers, where the "averaged" power is in the range of 20 to 60Watts, but the peak pulse energy is above some Kilowatts!

The laser in your second link has not 10 Watts, but only 0,5Watts! - look on the stated power in the second image ...


Viktor
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