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1276
T2 Engraving / Re: Laserable Aluminum
« on: August 18, 2016, 10:16:59 AM »
I don't know for sure about it being powder coated but I would say you're right...the top finish is so hard and smooth I'll bet it is powder coating...!!!

There is no clean up to do at all...when the material arrives, all you have to do is remove the protective coating layer of clear plastic, by peeling it off the black surface, comes off easy and then you're ready to laser...after you laser, you're done....nothing else to do...just cut out the size you need around your lettering and mount it in a frame...or cut it first and then laser...either way it looks just great...!!!

1277
T2 Engraving / Re: Laserable Aluminum
« on: August 18, 2016, 09:24:43 AM »
You can order different colors for the lettering/text...I just choose Gold but they have other colors...this really turned out well, I may start to make some signs and plaques...but I need to find more hours in the day  :D

1278
T2 Engraving / Re: Laserable Aluminum
« on: August 18, 2016, 08:04:33 AM »
It feels like a coat of thick paint...in my case Black paint (not sure what it really is)...but very smooth on the surface...the laser burns through this, and under it, is a gold surface that the laser doesn't burn through...its this gold color that you see as the lettering/text.

1279
BenCutLaser / Re: Laserable Aluminum Example
« on: August 17, 2016, 09:43:13 PM »
Yep, not too bad at all.

http://www.johnsonplastics.com/catalogsearch/result/?cat=&q=laserable+aluminum

$6.85 for a 1 foot x 2 foot sheet. I bought the gold lettering with black background sheet.

1280
BenCutLaser / Laserable Aluminum Example
« on: August 17, 2016, 09:10:54 PM »
I ordered some laserable aluminum just to see how it would work with BenCutLaser. I wanted to see if I could make plaques and signs. The material arrived today and the attachment says it all. It was hard to get a good picture because of the reflection, but looking at it up close, it came out awesome!

They have different colors and I ordered (obviously as you can see) black.

1281
T2 Engraving / Re: Laserable Aluminum
« on: August 17, 2016, 08:17:39 PM »
I received my laserable Aluminum today from JohnsonPlastics...I ordered it in black, although they had other colors.

I can't believe how great this came out (using my BenCutLaser software)...my pic is taken with my phone, at night, so the lighting isn't the best...I also had to angle the phone so as to stay out of the surface mirror glare of my flood light...it's not the sharpest photo but when I look closely at the Aluminum, it came out perfect...sharp as a tack and very easy for me to focus my laser beam on to get the right focus...and I just used my Medium burn laser tool I had created for 3mm wood...it was perfect for this material.

I can now make some awesome signs and plaques...!!!

Update: Added another attachment.

1282
Cutting / Re: Good at straight lines, poor at curved lines
« on: August 17, 2016, 07:14:07 PM »
What software are you using?

Sorry, I missed it...you're using Benbox.

1283
General Discussion / Re: 3D PRINTED ITEMS
« on: August 17, 2016, 08:37:28 AM »
ABS (instead of PLA) would help with that heat problem from the sun...

1284
BenCutLaser / Re: 1.6 watt laser
« on: August 16, 2016, 08:07:17 PM »
You should be able to calculate the delivered energy...but actually measuring it, I don't know how you would do that...

1285
BenCutLaser / Re: 1.6 watt laser
« on: August 16, 2016, 06:56:46 PM »
I doubt it. I'm only interested in comparing how hot each of my laser heads get...I now have two 2.5 watt units...I want to see how close or how far apart their heat signatures are running at 100% power on long cut jobs.

1286
BenCutLaser / 1.6 watt laser
« on: August 16, 2016, 04:29:08 PM »
FYI -- I am planning to order a 1.6 watt laser diode from China. I am getting a price quote from my China factory, AliExpress.com Novel Life.

I want to see how the 1.6 watt unit compares to using my 2.5 watt unit -- and -- I want to measure its heat signature when running at 100% power.

1287
General Discussion / Most online record for our little forum
« on: August 16, 2016, 04:21:03 PM »
Two days ago, our little forum, set a most online record of 95 users...!!! Yes, I realize we're not as big as CNCZone.com but we're growing!!!

I spend a lot of time rejecting new accounts because their email addresses end in *.ru which is a big source of spam. And I also reject other email addresses that look strange to me. I'd say we're getting about 12 to 16 new account requests per day (which is slowly increasing each week) and about 20% to 30% of those I reject.

So, despite all of that, our little community is growing...!!!

1289
Grbl Controller / Re: How To Upgrade Your Grbl Software
« on: August 16, 2016, 01:55:40 PM »
You don't have to do this, I don't think. It sounds like all you need to do is adjust your acceleration settings of your Grbl. It sounds like they might be set too low.

You can manually see your settings using different software but in my BenCutLaser (screen shot attached) just go to the com port tab and click the $$GrblSettings link and BCL will ask the controller to send back the current Grbl settings...look at what your values are for $120 and $121. If you don't have or don't want to install BCL just use any software where you can manually send the $$ command.

I use about 400 and if yours is set to under 100 the head will slowly decelerate before coming to a stop and then slowly accelerate back up for the next line burn. A setting of 400 to 500 will give you fast, crisp stop starts which is what you want for lasers...but...make sure your frame is secured to your work bench!

1290
General Discussion / Re: 3D PRINTED ITEMS
« on: August 16, 2016, 01:14:55 PM »
That roof was made in two sections. Printed vertically (on end) so it is a high print job. It might be easier/better to print the whole roof in three sections, that way, each one wouldn't have to be so high.

As for the warping, this tends to happen as the part is cooling on the hot bed...but is usually seen as a portion of the part coming up or lifting up, from the bed. The part that looks warped, its hard to tell if that was near the bottom or at the top end. Unfortunately, there are a lot of things to get right as your setup and tweak your configuration...one of them to control warping is to get the starting and mid-job bed temperature settings 'right' otherwise your part is highly likely to warp on you. There is also a extruder head starting temp setting and mid-job temp setting but this doesn't affect parts warping (or shouldn't).

So, @Zax, my long winded answer is this: when you have warping, it indicates you still don't have your machine configured 100% correctly...yet.

And another thing (and yes there seems to be no end to that statement when it comes to 3D printers) is how you decide to lay your part on the 3D software you are using. Meaning, you can turn, move, twist, reverse and zoom your part on the virtual bed in any manner you like...but...there is usually only one or two ways in which the print build up will work.

Sometimes, a part will stick out and unless you KNOW you have to add PLA support structure to it, the print won't come out at all. When I started to print Pawpaws laser air blower housing I stopped at looked at it inside my Repetier software virtual bed and thought, which side of this thing do I lay it down on? and do I need to add support extensions to hold up some of those parts that are sticking out? As an experienced 3Der I was able to make the right decisions (which does not happen all the time) and my first print turned out fine but I wasn't really sure that it would.

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