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Messages - nehal

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1
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 28, 2017, 03:13:04 AM »
That's wonderful, Zax. Thanks for implementing the feature.

2
T2 Engraving / Re: Alarm?
« on: July 18, 2017, 10:06:07 AM »
I used to encounter similar error with mana se board randomly. It was so ennoying. Only solution worked for me was replacing nano with new one. No error since then.

3
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 18, 2017, 09:53:10 AM »
That's very nice engraving!

Zax, Waiting for next update for that white space feature. I am out of town now. Will continue with more images, once I get back.

4
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 17, 2017, 11:25:23 PM »
Looks nice. Improve contrast for better results. Turn on dynamic laser power to get rid of that dark border.

Post settings. What is the material you are engraving on?

5
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 11, 2017, 07:27:50 AM »
Start with the engraving test image attached in first post. Import it using 0.1 resolution, to get closest to it's actual dimensions. Then you can change to around 0.15.

Second, what material are you trying to engrave? Not every material has linear response to laser. What board do you have? Do you have your laser wired for TTL?

Birch ply and mdf have good linear response to laser. I am yet to try different wood and other materials. Considering TTL setup, here is what to try.

0.15 resolution is good balance for quality vs time and produce no overlaping. Use diagonal engraving. Load the test image. Try speed 1000-3500. Narrow down the range. If too light, decrease speed, too dark then go faster, until you get proper shades from dark to light. Then try these settings on any other image. Also check laser focus.

Set lower S value just below the point your laser start to engrave.

6
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 06, 2017, 09:21:37 AM »
Thank you Zax. The image is 110mm width, engraving bigger will bring out more detail.

I used inkscape for white space and editing rgb when needed. Please add "add white space" feature to T2 , as it's very helpful for mechanically under optimized systems. So that it can be added on the go.

7
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 06, 2017, 07:11:33 AM »
Adding white space did the trick.  Added 3 mm around all the edges and the visible backlash artifacts are gone.
Feature like this in T2 will help greatly. Also things like sharpening image, rgb channel control will be very helpful for better contrast.

Here is the image done with added whitespace.


8
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 04, 2017, 07:27:30 AM »
Thank you Zax. White border is nice idea. I will try it to see the difference. Can it be implemented as an optional feature in T2?

9
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 03, 2017, 10:21:37 PM »
Thank you Zax. The test file is from thingiverse. Should I tighten the belts?

I have a suggestion for T2 related to engraving. For 45deg engraving, the starting point is a tiny dot. So at the begining of engraving, for about 5 second or so, laser moves like crazy due to small area. My suggestion is, can you add extra few mm to gcode so that after the edge of the image, the laser turns off and it keeps on moving for another3-5mm, comes back to the point, turns on again and so on. This should act as "software compensation" to any artifacts around any edge of the image due to rapid change in direction. Not just to the starting area, but it can be implemented to entire image to its all four edges.

10
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 03, 2017, 12:33:46 PM »
More images coming up. I will be testing on birch ply and other wood, mirror, glass, acrylic etc when I get time. Please post your comments and suggestions.

11
T2 Engraving / Re: Grayscale Engravings done with T2
« on: July 03, 2017, 12:29:40 PM »
Speed: 2800
Power: 25-210
Res: 0.15
















Dithering
Power: 200
Speed: 3000
Res: 0.1


12
T2 Engraving / Grayscale Engravings done with T2
« on: July 03, 2017, 12:05:43 PM »
Here are some of the grayscale engravings done using T2. I had some time experementing. I will be posting images with settings.
Setup:
Eleksmaker A3
Mana SE board
2300mw TTL laser

This was the image used as a test image to get proper calibration/settings.

Engravings are done on mdf, cardboard. I will be updating this thread with many other materials. My initial results were from charcoal like to very light.

Here is one of the tests.
Speed: 3400
Res: 0.15
Diagonal engraving
Power: 25-255

Shades look good. But small details are shaky. So either I have to stabilize the engraver mechanically or lower the speed and power to compensate it.

Test2
Speed:2800
Res:0.15
Power: 25-210


I will be using above settings for most of the engravings on mdf.

Let's start with cardboard. It's tricky to engrave as it quickly turns to charcoal at power abrove 110 even at high speeds.

Speed: 3200
Power:30-100
Res:0.1


Speed: 3200
Power: 20-65
Res:0.1


Speed: 3200
Power: 25-100
Res: 0.1


Let's move to mdf.
Speed: 3400
Res:0.15
Power: 20-255
Horizontal


Speed: 3400
Res:0.15
Power: 20-255
Horizontal



13
T2 Engraving / Re: Mana SE led D4 blinking [Solved]
« on: June 19, 2017, 11:18:33 PM »
Replaced with 35V cap, and board is working again. Thank you for your advice. Will post some grayscale results in new post soon.

14
T2 Engraving / Re: Mana SE led D4 blinking [Solved]
« on: June 09, 2017, 08:28:40 AM »
It was 16V capacitor. Removed it and board is working again. I will have to replace it.

15
T2 Engraving / Re: Mana SE led D4 blinking
« on: June 04, 2017, 07:09:18 AM »
And that explains this, how ?
I took out nano from mana se and flashed it with older version and then flashed again with 1.1f without any errors. And i also tried another working nano from L7 board. Connected it to Mana se board, and powered it on. Same problem, led D4 still blinks. And nothing happens. I may be wrong, but tried two nano and no change.
Then I tried the nano with L7 board and the engraver works. Same nano with Mana se and led D4 keeps on blinking.

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