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Messages - nottingham82

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Projects / Re: Foam Board Size machine upgrade (20" X 30")
« on: November 01, 2016, 12:58:26 PM »
Ive seen forum posts from Bob Puckett but I cant remember where.  Was he here for awhile?  He could probably sell a few of those things in this community if he still had the bug to do it.

General Discussion / Re: DXF SVG JPG PNG Depository
« on: November 01, 2016, 12:51:59 PM »
hmmm I have a drop box.... but I also have 3 email addresses.  I could always sign up with one of my other email addresses for the cause.  This could be a good solution.

Engraving / Re: Slate?
« on: November 01, 2016, 12:43:20 PM »
Sorry I think I update this post too much but its my post and I dont care.  So I have some spray polyurethane for wood. I may give that a try as a sealer.  I am also tempted to try a spray paint then engrave over it.  I might have to use a tape mask if the paint creates smoke that will affect the rest of the painted surface...

I have only ruined a few pieces so I try to only experiment on those ones.  I need to stop being cheep lol at $.75 a coaster I can afford to fail a few times.

General Discussion / Re: DXF SVG JPG PNG Depository
« on: November 01, 2016, 12:36:58 PM »
Never used it before.  I signed up.  I can see how you can enter and save code but not files.

Engraving / Re: Slate?
« on: November 01, 2016, 12:14:10 PM »
here is the joans ones I picked up.  $4.49 isnt a bad price.  When I started this venture I was paying $8.00 at Cost Plus and I thought that was a great deal!

Engraving / Re: Slate?
« on: November 01, 2016, 11:24:04 AM »
I was just about to ask you about sealing them lol. Based on close inspection I would have to agree with you on them being pre-sealed. I have not tested the durability of the engraving and I don't know how well it will stay without additional sealing. I have a piece that isn't going to be worth engraving so I'll use that piece for some abrasion tests :)

I havent talked about this before but I have had some flaking of the engraving.  It maybe because the sealing is flaking off.  I noticed it heavily when i was using 500 speed and real high resolutions .02 and such.  Thats why I backed it way down and now do 900 with .1 and now I get almost none.  When it does flake you can just use a bristle brush to get rid of the flakes and go manual.  turn on the laser full power and jog it at 1mm back and forth over the spot.  it will almost completely disappear.  Probably wont work well on grayscale but then again the low power probably wont flake at all.  I saw the mod podge review and I have been curious myself! Let me know how your tests turn out.

P.S. I went to Joans and they have round slate coaters and slate signs! not quite as cheap as michaels but I like a variety! 

General Discussion / DXF SVG JPG PNG Depository
« on: November 01, 2016, 10:49:28 AM »
Hey guys.  So I was talking to ralph about setting up a topic to deposit good usable DXF SVG and picture files that we know will work well with our systems.  For instance, I have a good DXF i found online for a grid with letters.  I used it on some mdf to create my support piece inside the gantry so i know how big I can engrave and of course helps me line stuff up straight.  The problem is we dont have enough bandwidth here to support a file center such as what I'm proposing.  Does anybody know of a good free file hosting site we could link a topic to so we can share files that work?

General Discussion / Re: LASER WORK SUPPORT
« on: November 01, 2016, 10:17:57 AM »
i used expanded steel. (  Its cheap $10 at home depot.  It cuts super easy with a pneumatic grinding wheel.  I just used my wood one as a template.  I wanted something that wouldnt bow in the middle. seems to work so far.

Engraving / Re: Slate?
« on: November 01, 2016, 10:08:20 AM »
Yeah, I thought I had more space on the sides than I did and this piece almost went edge to edge lol.

The nice thing about it being 100mm is finding the center is super easy.  Jog to the edge.  change to 50mm jogs.  Jog 1 time toward the middle.  reset home.  Jog to the top. reset to 50mm jogs and jog once down.  boom! center.

Engraving / Re: Slate?
« on: November 01, 2016, 10:06:02 AM »
2 thoughts on finishing the slate.  I have used a sealer on 1 of my pieces and it didnt absorb in very well.  This makes me think they come sealed.  So sealing may not be necessary.  If you do seal, there are two kinds matte and gloss.  I tried matte and it looks exactly the same as it did originally.  Havent tried gloss yet. 

Engraving / Re: Slate?
« on: November 01, 2016, 09:54:05 AM »
Wow! That looks great. I haven't done too much experimenting with gray-scale. That looks phenomenal. One other thing. I always out put at 80 or 85mm because the slate is exactly 100mm but because of the decorative side chipping some have a smaller engravable surface than others.

General Questions / Re: top speed ?
« on: October 31, 2016, 08:57:20 PM »
ive been testing a bunch of different design, setting and type of wood for engraving, gettin some pretty impressive result and damn proud of it!
i was wondering tho, what is the fastest yet safe speed i can make it go? im using benbox at speed from 800 to 2600 right now and would like to speed things up sometime so is it safe to go to 4000? 6000 maybe??
thanx for your time :)

Yo Tommy!! when are we gonna get to see your impressive results!! I'm a visual learner your guy's art work inspires me!!

General Questions / Re: top speed ?
« on: October 31, 2016, 08:54:30 PM »
I have tested them up to 15,000. Ran for a while at 12,000. I am running at 8,000 now. My homing speed is 5,000. Tuning the machine helps.

Make sure it is square. Make sure you have the right belt tension. Lubricate the wheel bearings. Make sure your belt is running in the center of the pulleys, not touching the sides. Adjust your stepper drivers. Both Y belts need to be pretty close to the same tension.

I run my belts a bit tighter than is recommended. I run my stepper drivers, X less than .3V and Y at less than .5V steppers run cool at these settings.

We need an article on running these machines!

LUBE!??! what are you using to lube your belts?

Projects / Re: First successful burn!
« on: October 31, 2016, 10:12:30 AM »
Nice.  I just started experimenting with using blue painters tape to keep off the smoke burn.  It works well but you have to slow down the laser so it has time to cut the tape and the wood.  I'll give you some settings when i perfect the art.  (why painters tape? it was in my garage)

Engraving / Re: Slate?
« on: October 31, 2016, 10:10:19 AM »
yeah and I'v changed my settings.  I'm now make a png in inkscape 800mm x 800mm.  Scale it down in t2 to 80mm x 80mm.  resolution .1 speed 900 and boom. magic.  Here is the inkscape file if you want a template for any of your christmas gifts.  Just make something pretty and export as png from the file menu.  select whole page and give it a name.

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