Author Topic: House Elves On Strike  (Read 4271 times)

Agastar

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House Elves On Strike
« on: October 22, 2016, 01:01:39 PM »
Well, I think I finally got it dialed in to something acceptable. Now, to go replace all the wood that ended up being test pieces lol.

Feed Rate: 1800
Resolution: .1
Width: 149mm
Height: 115mm
Power: 0-255

Image Processing: I removed the white background from the text and cut out the house elf leaving a transparent background. The house elf's contrast was adjusted to -20 to bring out some of the lighter tones and the image was saved as a png file.

Wood processing: I forgot to sand the wood before engraving but I will do that on the rest of the pieces. A light sanding will bring out a little more detail.

Hardware: The laser module was custom built with an M140 laser diode that is currently set to 2000mW and is being driven by the PWM/TTL laser driver I designed.

Other Notes: The house elf was engraved separately from the text but the machine and T2L settings were the same for both.

Zax

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Re: House Elves On Strike
« Reply #1 on: October 22, 2016, 01:56:57 PM »
Looks very nice!

ggallant571

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Re: House Elves On Strike
« Reply #2 on: October 22, 2016, 02:47:16 PM »
Go to Wal-mart and get some of the 4x6 neon index cards. About $0.88 for 100. They are perfect test material. The surface color burns off with very low power. You still have to adjust for the wood in the end but they sure save a lot of wood.
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Agastar

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Re: House Elves On Strike
« Reply #3 on: October 22, 2016, 03:04:31 PM »
Thanks!

I'll grab some of those cards. Only problem is wood is hard to get right unless you have the same wood to dial in the settings with.

ggallant571

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Re: House Elves On Strike
« Reply #4 on: October 22, 2016, 03:19:26 PM »
I am etching the elves at speed 1800 and power setting 6 out of 255 with unfocused beam. This is my second attempt, first failed because the text was backwards. Never noticed that x direction invert was asserted. Don't use the grbl firmware very much anymore and everything else apparently didn't matter.
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Agastar

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Re: House Elves On Strike
« Reply #5 on: October 22, 2016, 04:57:47 PM »
Cool, I'd like to see what you come up with.

ggallant571

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Re: House Elves On Strike
« Reply #6 on: October 22, 2016, 06:29:11 PM »
She Who Must Be Obeyed likes it. I took your original and tried to clean up around the lettering. Gave up and erased the existing letters and then used the text entry on gimp to replace the words. Looks ok on the screen up not etched, at least on cardboard. Took about 20 minutes. I think the pixel to mm conversion is wrong plus the power was too strong.
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Agastar

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Re: House Elves On Strike
« Reply #7 on: October 23, 2016, 04:50:32 PM »
Yeah, I didn't even think about cleaning up the lettering. Before I took out the background I adjusted the brightness a little and that helped make the lettering darker.

Here are the final two images I used combined into one. You can see how much I darkened up the house elf lol.

ThothLoki

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Re: House Elves On Strike
« Reply #8 on: January 14, 2017, 11:21:58 AM »
ok. So I tried to do this one.
Last night, I took my engraver apart, flipped my x axis, greased up the wheels, tightened all bolts and tightened all of the belts. I did focus the laser as well. If you look at the picture labeled "full picture", you will see the difference between when I has the x axis going in reverse and when I finally found the setting to correct that.

The other two pictures are closeups of the lettering that shows the difference between the two burns.

For timeline purposes, I started the reversed burn and then found the menu. I stopped the burn, reversed the x axis in T2L and started again.
My questions is, why are my lines so wavy?
Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

nottingham82

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Re: House Elves On Strike
« Reply #9 on: January 14, 2017, 11:37:27 AM »
I had wavey lines once. Switched to diagonal engraving and it went away.
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

ThothLoki

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Re: House Elves On Strike
« Reply #10 on: January 14, 2017, 11:43:39 AM »
I will give that a shot and report back.
Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

nottingham82

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Re: House Elves On Strike
« Reply #11 on: January 14, 2017, 12:09:17 PM »
It happened when I went to a new firware.  .9 is still my favorite.  although When I'm testing its nice to be able to up the speed on the fly.
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

Zax

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Re: House Elves On Strike
« Reply #12 on: January 14, 2017, 12:13:51 PM »
The wavy lines are most likely caused by incorrect belt tension or some slop in the axis.

Diagonal engraving and using 0.9g will both mask the problem. Grbl 1.1 is faster with the motion so makes it appear worse, in the same way diagonal actually moves slower since 2 axis are being used to get the same feed rate.

nottingham82

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Re: House Elves On Strike
« Reply #13 on: January 14, 2017, 12:14:59 PM »
sure blame the craftsman and his tools and his lack of tool maintenance and the computer next to his tools....

he is not wrong though.

You would be proud zax.  Just yesterday I re-tightened all the belts and screws.
« Last Edit: January 14, 2017, 12:16:39 PM by nottingham82 »
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

Zax

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Re: House Elves On Strike
« Reply #14 on: January 14, 2017, 12:18:05 PM »
Well my first thought was his machine got in the alcohol cabinet.