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CNC Laser 2017

PhiMX

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Hi!

I do want to retrofit my CNC with a laser for cutting and engraving (In this order of importance).

Somewhere in the forum I read this line by DTR regarding the best laser for engraving application:
"If you want finer engraving you can get more detail as you go down in power. NDB7A75, NDB7875, PLTB450B and then BDR-209."

Does this, the other way round also apply for cutting power? So, NDB7A75 is best, NDB7875 is second and so on..

I saw that NDB7A75 is out of stock at DTR´s and has gone VEEERY expensive on other sites.. why´s that? No more in production?


NUBM44 sounds tempting because of the high power, but since it produces more of a line than a spot where the power is distributed on, It might well be that a laser with less power but more concentrated on the spot is better for cutting. Someone said cutting with the NUBM44 is more like writing with a calligraphy pen.. fine in one direction, broad in the other.. I wonder if rotating the laser into the cutting axis would make it a good laser for this application... but that´s another story (of reading gcode and applying some math and then driving a 4th rotational axis accordingly)

So, what to buy if I want clean cuts that do need as little passes as possible? I Don´t want to do production cutting so speed doesn´t matter for me. If my wooden board for a prototype takes 5 hours instead of 5 minutes that´s almost also fine for me...
What to get right now in the beginning of 2017?
 
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PhiMX

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I can't believe nobody of the regulars is able to comment on this, especially the tradesmen here...
Is there a reason why nobody comments on this?

Like look it up dude, the answer is so obvious?
-I don't think so...

Best regards
 

Encap

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I can't believe nobody of the regulars is able to comment on this, especially the tradesmen here...
Is there a reason why nobody comments on this?

Like look it up dude, the answer is so obvious?
-I don't think so...

Best regards
This thread has been dead for 8 months--please do not necro-post if yoou have nothing meaningful to add. Is very frownd on.

You did not do a Welcome post in the Welcome sub-forum --- is necessary if you expect any real help

You can look here for low cost reasonable good quality CNC engraving heads based on NUBM44 diodes.
OptLasers: https://optlasers.com/en/15-cnc-3d-lasers?gclid=EAIaIQobChMIm_qxlrGF1wIVyFmGCh2oKgi7EAAYASAAEgITIfD_BwE

Look here for laser CNC cutting heads: Laser cutting head - All industrial manufacturers - Videos and google surces yourself
 
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Hemlock_Mike

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I'm Kinda glad this came up because I was going to start a new thread. Long ago, a number of us bought a small etcher kit which included a Blu laser at low power. I have played with it occasionally but recently converted to a DTR 209 diode with an adjustable power supply. Although the laser focuses to a point, the cuts look like hell hit the target and now I believe that the smoke is blurring the beam on my cheep wood! I have a small fan to install.
Also, is there any other simple program which will drive this little toy?



The display is LD current (adjustable) and it provides low threshold output for setup and switchover to burn.

HM
 
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Encap

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I'm Kinda glad this came up because I was going to start a new thread. Long ago, a number of us bought a small etcher kit which included a Blu laser at low power. I have played with it occasionally but recently converted to a DTR 209 diode with an adjustable power supply. Although the laser focuses to a point, the cuts look like hell hit the target and now I believe that the smoke is blurring the beam on my cheep wood! I have a small fan to install.
Also, is there any other simple program which will drive this little toy?
[/IMG]

The display is LD current (adjustable) and it provides low threshold output for setup and switchover to burn.

HM
Interesting--you should start a thread about it as it is very far away from being a CNC machine that can "machine" cut many materials.
 
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Hemlock_Mike

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Encap --
You are right about that but there is a big difference between engraving and cutting. Most of us here don't have the desire to build a 40 to 100+ Watt CNC system. I enjoy etching (engraving) small wood pieces and this old inexpensive kit was then basic fun. People ask me what I do with the lasers and I show them my etchings!



This will cut paper and the OP asked about laser diodes in the 1 Watt range.
HM
 
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Encap

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Encap --
You are right about that but there is a big difference between engraving and cutting. Most of us here don't have the desire to build a 40 to 100+ Watt CNC system. I enjoy etching (engraving) small wood pieces and this old inexpensive kit was then basic fun. People ask me what I do with the lasers and I show them my etchings! This will cut paper and the OP asked about laser diodes in the 1 Watt range.
HM
Agree and that was my point--you should start a new thread about that--the OP in this thread and the title are about CNC machine laser cutting as well as engraving with it info
 

Encap

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OP is posting in his own thread. Bumping is allowed. :whistle:
Fair comment, I guess

A Welcome thread post might help elicit some response.

This thread is 8 months old and nothing new just whining was posted.
Maybe the OP will bump it again June 2018
 

swamidog

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i built a 60W co2 cnc laser cutter a while back. i can't imagine being satisfied using a low powered 445 multimode diode vs. the higher power and better specs of a co2 laser.

here's my rig cutting some paper for an art project i'll post about later. ;)

 

Encap

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i built a 60W co2 cnc laser cutter a while back. i can't imagine being satisfied using a low powered 445 multimode diode vs. the higher power and better specs of a co2 laser.

here's my rig cutting some paper for an art project i'll post about later. ;)

Agreed. 445nm is a toy and not problem free usable by comparison.

Nice work--looks good and works very well
 
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Hemlock_Mike

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My post #8 shows some fun stuff my little
CNC can do to small wood placks. I'm trying
to get more power to achieve a deeper burn.
HM
 
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A Beautiful Laser Engraving Machine and 40W C02 Cut, Chinese Manufactory!
Large white and celestial rectangle! On Amazon you find it cheap ...!
IMO
 




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