Re: [CAD_CAM_EDM_DRO] Re: Laser Engraving

Bob
I would be interested in your info.
regards
John

Bob Muse wrote:

>Hi
>
>Thanks to all those who replied to my post on CO2 lasers. The response was
>much greater than I had expected. I will need a couple of days to set up my
>test bench and see what I have left and how much power they are producing.
>I'm not even sure I will have any good ones left so don't get too excited.
>
>Somewhere I have a text file with info on these which I will send along.
>But briefly they are small sealed ceramic tube RF excited units that are
>removed from laser markers because the power has diminished somewhat. I
>have the RF power supplies. They are really good for someone who wants to
>get a little experience with CO2 lasers and see what they can do. I was
>able to cut 1/8 balsa, thin cardboard, paper, label stock etc nicely. They
>also mark anodized aluminum and engrave wood very nicely. They won't cut
>any metal or much thicker material. They are easy to mount on a cnc "Z"
>axis and fairly simple to get going.
>
>If you would like more info and some pics just reply back to this email and
>I will send them out. I should have an answer to what's available and how
>much $$ by Thursday.
>
>Regards,
>Bob
>----- Original Message -----
>From: "whelenremington" <wperun1@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: Monday, November 07, 2005 10:45 AM
>Subject: [CAD_CAM_EDM_DRO] Re: Laser Engraving
>
>
>
>
>>Bob, thanks for your reply. As you know I e-mailed you for
>>information on pricing. It may be useful for the rest of the group
>>to repeat some of my questions. I can see how conventional CNC mills
>>will move the x and y axis so that the laser can "cut" the design.
>>You can see what I mean by design on the web site - (
>>www.epiloglaser.com/applications.htm ). But, what varies the
>>intensity of the laser to "change the contrast" of the design
>>being "cut" by the laser. I am using the software Virtual Sculptor
>>3D, ( www.designscomputed.com/vs3d/ ) . VS3D is both CAD and CAM
>>software, and works in both raster and vector space. So it generares
>>the G-code for the Z-axis heights as a function of image contrast.
>>Now my question is - do I let the Z axis move the laser to achieve
>>the "intensity levels" to achieve the contrasts in the image, - OR do
>>I need electronics to read only the Z axis G-code from VS-3D and use
>>the electronics to vary the intensity of the laser?
>>
>>Will a low power CO2 laser yield a "material burn" proportional to Z
>>axis movement? Does anyone have an idea of how Epilog Laser does
>>this in their machines? Are there various ways to do it?
>>
>>Thanks for your help.
>>
>>Whelen
>>
>>
>>
>>
>>
>>
>>--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Bob Muse" <mtebob1@s...>
>>wrote:
>>
>>
>>>Whelen and Skulworks--
>>>
>>>I may have some small CO2 lasers for sale cheap. I had a number of
>>>
>>>
>>these
>>
>>
>>>units removed from laser marking machines about a year ago--had one
>>>
>>>
>>on my
>>
>>
>>>CNC mill for a while--it would mark anodized alum very nicely and
>>>
>>>
>>cut thin
>>
>>
>>>carboard and balsa etc. Sold most of them but there are some
>>>
>>>
>>left. If you
>>
>>
>>>are interested, email me off-list. mtebob1 at sbcglobal dot net
>>>
>>>Bob
>>>----- Original Message -----
>>>From: "whelenremington" <wperun1@r...>
>>>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>>>Sent: Sunday, November 06, 2005 2:06 PM
>>>Subject: [CAD_CAM_EDM_DRO] Re: Laser Engraving
>>>
>>>
>>>
>>>
>>>>Skulworks, I am also interested in using a laser to engrave,
>>>>and "burnish" Cap plastic to make designs. The commercial
>>>>
>>>>
>>machines
>>
>>
>>>>I've seen have an optical beam focusing system. Can you provide
>>>>information as to what web sites sell retail to hobbyists, the
>>>>lasers, focusing systems, power supply, and "suport equipment".
>>>>Roughly what would all this cost? Thanks for your help.
>>>>
>>>>Whelen
>>>>
>>>>--- In CAD_CAM_EDM_DRO@yahoogroups.com, "skullworks"
>>>><skullworks@y...> wrote:
>>>>
>>>>
>>>>>--- In CAD_CAM_EDM_DRO@yahoogroups.com, "norclippet"
>>>>>
>>>>>
>>>><norclippet@w...>
>>>>
>>>>
>>>>>wrote:
>>>>>
>>>>>
>>>>>>I would like to fit a laser engraver onto my small CNC mill
>>>>>>
>>>>>>
>>to do
>>
>>
>>>>>>engraving (marking) on polished stainless steel. Does anyone
>>>>>>
>>>>>>
>>>>know of
>>>>
>>>>
>>>>>>a reasonably priced laser head which has sufficient power for
>>>>>>
>>>>>>
>>>>marking
>>>>
>>>>
>>>>>>stainless?
>>>>>>
>>>>>>
>>>>>>
>>>>>For a Constant Wave (non pulsed) 1024nM NdYAg laser you would
>>>>>
>>>>>
>>need
>>
>>
>>>>>about a 50watt to get a good mark (brown) - That is going to
>>>>>
>>>>>
>>>>require a
>>>>
>>>>
>>>>>huge power supply and support equipment.
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>wanliker@a...,
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>>
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>>Moderator: pentam@... indigo_red@... davemucha@...
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>[Moderators]
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>>URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>>
>>OFF Topic POSTS: General Machining
>>If you wish to post on unlimited OT subjects goto:
>>
>>
>aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
>you have trouble.
>
>
>>http://www.metalworking.com/news_servers.html
>>
>>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
>>
>>
>sister site to the CCED group, as many of the same members are there, for OT
>subjects, that are not allowed on the CCED list.
>
>
>>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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>>
>DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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>>bill
>>List Mom
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>>Yahoo! Groups Links
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>Addresses:
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>FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
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>Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
>URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
>OFF Topic POSTS: General Machining
>If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
>http://www.metalworking.com/news_servers.html
>
>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>
>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
>bill
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