Author Topic: Slate?  (Read 1753 times)

Zax

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Re: Slate?
« Reply #60 on: November 15, 2016, 04:41:57 AM »
Maybe it's just the picture but 2100-2500 look great, and faster is always better.

nottingham82

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Re: Slate?
« Reply #61 on: November 15, 2016, 07:18:36 AM »
You can really see it in the picture at 2500 but it is super liney.  In person the lines start appearing at about 1500 you could probably still go up to 1700 and not have it be terrible.  These were all at .1 resolution so maybe a 2500 with better resolution would get rid of the visible lines.
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Agastar

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Re: Slate?
« Reply #62 on: November 15, 2016, 10:57:37 AM »
For the higher speeds, try de-focusing the laser a little bit and see if that helps with the lines.

nottingham82

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Re: Slate?
« Reply #63 on: January 06, 2017, 06:31:50 PM »
so here is what they looked like just before they went into the gift bag.  I saw someone else does these boxes with a lid.  I may try that.  You just make another box a bit bigger.  You also need to put something decorative on the lid, instead of a lame hole like i have in the bottom piece.

I might make those cool avengers coasters and do the avengers "A" on the lid.... or not be fancy and just write "coasters"
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http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

Zax

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Re: Slate?
« Reply #64 on: January 07, 2017, 05:02:19 AM »
Very nice, that slate really looks great.

Did you use the air assist? (I'm wondering if it helps prevent the dust/particles from messing up the result)

nottingham82

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Re: Slate?
« Reply #65 on: January 07, 2017, 09:32:03 AM »
originally I did use air assist.  I really dont see any difference in the results when I use it.  I mostly have stopped as it makes my garage quieter with the air compressor off.
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http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

Zax

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Re: Slate?
« Reply #66 on: January 07, 2017, 09:40:33 AM »
Sounds reasonable.

A trick I use with the CO2 laser when engraving glass is to put a damp paper towel on the surface, it keeps the pieces in place and prevents the micro cracks from becoming too large. You get a much crisper result and don't end up with 10,000 cuts when cleaning up.

If you haven't tried removing the "paint" from the back of a mirror yet, give that a go. It works fantastic and you can even do a multi-color design by etching and filling with acrylic and then etching again. I used cheap dollar store mirrors that were in a picture frame. I suspect higher quality mirrors may have a more metallic coating which can't be removed.

nottingham82

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Re: Slate?
« Reply #67 on: January 07, 2017, 10:06:24 AM »
I actually have done mirrors.  Only one or two as a proof of concept.  I never thought of the paint.  Might make a good coaster if you had the right size.  You of course have to remember to reverse the image!  Made that mistake the first time.  I havent continued down that line of work because most of the mirrors feel like trinkets that would just cause clutter.  I like cool things that add to a room or office... I need to get to making my coasters lol.  I have done so much as gifts I need to design mine.  The only work I have in my house is a door sign I did for my gf's sewing room.  She loves it.

I did see some mirror pieces at michaels that are supposed to be for a mosaic.  That might make a good project.   
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nottingham82

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Re: Slate?
« Reply #68 on: January 07, 2017, 10:10:02 AM »
Oh and the damp towel method... I take it wet one sheet, lay it perfectly flat, and no air assist?  do you have to slow down the laser much on glass? 

I would love a 40W with a rotate do-hicky to do wine glasses.  I may try stencils and acid or sandblasting.  There has been some good conversation here about stencils. 
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nottingham82

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Re: Slate?
« Reply #69 on: January 14, 2017, 03:41:54 PM »
ok i lied.  You can get an engraving off the slate.  You also loose alot of the cool stone characteristics.  Everything gets smoothed out.  To remove the engraving get out your orbital sander medium grit paper and lean on it.  Smooths the slate, removes the design and really flattens the piece.  Dunno if I like it this smooth or not.  But yes you can have unlimited retries with this method.
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nottingham82

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Re: Slate?
« Reply #70 on: January 15, 2017, 12:03:27 PM »
Gift for a retiring friend.
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Agastar

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Re: Slate?
« Reply #71 on: January 20, 2017, 02:34:23 PM »
ok i lied.  You can get an engraving off the slate.  You also loose alot of the cool stone characteristics.  Everything gets smoothed out.  To remove the engraving get out your orbital sander medium grit paper and lean on it.  Smooths the slate, removes the design and really flattens the piece.  Dunno if I like it this smooth or not.  But yes you can have unlimited retries with this method.

Thanks I will have to try that :)

nottingham82

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Re: Slate?
« Reply #72 on: January 20, 2017, 03:23:50 PM »
sorry I updated the other thread but not this one.  I used 220 grit.  The piece was also wet with paint thinner which I hadn't fully wiped off.  Dunno if that made it easier or harder.
Laser: 2500mw A5 eleks maker
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http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

yankers

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Re: Slate?
« Reply #73 on: February 01, 2017, 11:48:56 PM »
$4?? lucky guys  :-\
Unfortunately the cheapest price I can find for Australia is $16 from eBay for a set of 4.

I'll definitely have to scrounge around to try find similar materials to experiment on