RE: [CAD_CAM_EDM_DRO] Laser positioning? Gantry or lenses?
Posted by
Paul Kelly
on 2005-10-14 02:59:56 UTC
Not sure about the cutting action, you'd probably need to vary the focus..
You could steer the beam with piezo mirrors.
Nearly all laser cutters just move a set of planar mirrors though. The
gantry wouldn't be that tough. Low Z height means low torques about the
slides. You could just run it on simple (bearing on angle iron) tracks..
ACME threaded rod is cheap and easily good for 0.5mm....
PK
-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Abby Katt
Sent: Friday, 14 October 2005 6:03 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Laser positioning? Gantry or lenses?
A rather charming lady friend of mine has been asking about a machine to
"cut out all kinds of fabrics from computer designs", since she does
professional costuming, it's going to mean everything from silks to
latex sheet (a nasty one to cut with mechanical tools), so I was
thinking inert-gas/20W laser.
Now this is something I've been thinking of for a long time, my idea was
to build a general purpose gantry that will do everything from (wood)
routing, to plasma-cutting to using a laser. Doesn't need to be
incredibly accurate, 0.5mm is more than enough. However, this is going
to be rather complex and cumbersome to build, and in light of my friend
now pestering me much more, I'm pondering building a laser specific
machine for just her. So this begs the question, if I'm using a laser,
can I just get away with some lens arrangement instead of needing to
build a whole gantry? It is a big area 3x5foot, so I'm worried that at
obtuse angles the laser will be more of a ellipse than a dot, but is
this at all possible?
How would you achieve driving/controlling this as the angle of the
mirrors would not be a linear relation like a mill axis, so you wouldn't
be able to drive it with say, mach 3? Or is there some neat mechanical
trick to relinearize it? Or am I just being silly because the shifting
focal length of the laser will not allow it?
BTW> I won't feel like a real eccentric inventor until I have a laser! :)
Thanks!
Abby
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NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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You could steer the beam with piezo mirrors.
Nearly all laser cutters just move a set of planar mirrors though. The
gantry wouldn't be that tough. Low Z height means low torques about the
slides. You could just run it on simple (bearing on angle iron) tracks..
ACME threaded rod is cheap and easily good for 0.5mm....
PK
-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Abby Katt
Sent: Friday, 14 October 2005 6:03 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Laser positioning? Gantry or lenses?
A rather charming lady friend of mine has been asking about a machine to
"cut out all kinds of fabrics from computer designs", since she does
professional costuming, it's going to mean everything from silks to
latex sheet (a nasty one to cut with mechanical tools), so I was
thinking inert-gas/20W laser.
Now this is something I've been thinking of for a long time, my idea was
to build a general purpose gantry that will do everything from (wood)
routing, to plasma-cutting to using a laser. Doesn't need to be
incredibly accurate, 0.5mm is more than enough. However, this is going
to be rather complex and cumbersome to build, and in light of my friend
now pestering me much more, I'm pondering building a laser specific
machine for just her. So this begs the question, if I'm using a laser,
can I just get away with some lens arrangement instead of needing to
build a whole gantry? It is a big area 3x5foot, so I'm worried that at
obtuse angles the laser will be more of a ellipse than a dot, but is
this at all possible?
How would you achieve driving/controlling this as the angle of the
mirrors would not be a linear relation like a mill axis, so you wouldn't
be able to drive it with say, mach 3? Or is there some neat mechanical
trick to relinearize it? Or am I just being silly because the shifting
focal length of the laser will not allow it?
BTW> I won't feel like a real eccentric inventor until I have a laser! :)
Thanks!
Abby
Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@...
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
List Mom
List Owner
Yahoo! Groups Links
Discussion Thread
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2005-09-30 08:26:17 UTC
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Re: Waterjet on a cnc knee mill
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2005-10-01 21:00:57 UTC
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Re: [CAD_CAM_EDM_DRO] Re: Waterjet on a cnc knee mill - water pump ?
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Re: Waterjet on a cnc knee mill - water pump ?
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Re: [CAD_CAM_EDM_DRO] Re: Waterjet on a cnc knee mill - water pump ?
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2005-10-06 07:20:27 UTC
Re: [CAD_CAM_EDM_DRO] Re: Waterjet on a cnc knee mill - water pump ?
Abby Katt
2005-10-07 13:50:39 UTC
Advice, BEFORE I BLOW UP my Sherline?
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2005-10-07 15:54:03 UTC
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2005-10-07 16:17:11 UTC
Re: [CAD_CAM_EDM_DRO] Advice, BEFORE I BLOW UP my Sherline?
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2005-10-07 16:19:04 UTC
Re: [CAD_CAM_EDM_DRO] Caps over Sherline spindle.. doesn't work...
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2005-10-07 18:20:35 UTC
Re: Caps over Sherline spindle.. doesn't work...
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2005-10-09 10:41:33 UTC
Re: [CAD_CAM_EDM_DRO] Advice, BEFORE I BLOW UP my Sherline?
Abby Katt
2005-10-14 02:50:58 UTC
Laser positioning? Gantry or lenses?
Paul Kelly
2005-10-14 02:59:56 UTC
RE: [CAD_CAM_EDM_DRO] Laser positioning? Gantry or lenses?
David Speck
2005-10-14 05:40:36 UTC
Re: [CAD_CAM_EDM_DRO] Laser positioning? Gantry or lenses?
vrsculptor
2005-10-14 08:54:27 UTC
Re: Laser positioning? Gantry or lenses?
Les Newell
2005-10-14 09:21:36 UTC
Re: [CAD_CAM_EDM_DRO] Re: Laser positioning? Gantry or lenses?
Jeff Goldberg
2005-10-14 10:51:00 UTC
RE: [CAD_CAM_EDM_DRO] OT (very :-) Re: Laser positioning? Gantry or lenses?
Robb Greathouse
2005-10-15 17:46:36 UTC
RE: [CAD_CAM_EDM_DRO] Laser positioning? Gantry or lenses?
skykotech
2005-10-15 21:05:29 UTC
Re: Laser positioning? Gantry or lenses?
skykotech
2005-10-15 21:14:04 UTC
Re: Laser positioning? Gantry or lenses?
skykotech
2005-10-15 21:17:47 UTC
Re: Laser positioning? Gantry or lenses?
Ron Ginger
2005-10-16 05:21:47 UTC
Re: Laser positioning? Gantry or lenses?