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Messages - ggallant571

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General Discussion / Re: Etching on mirrors
« on: Today at 07:00:11 AM »
The glass appears to be frosted by the laser. It is tough for me to see if any residual mirror material is still adhered to the glass. Have tried at to different power settings with no visual difference. Perhaps it is time to develop a test "test" pattern like Ralph uses on wood. Etch the speed and laser power with different width lines. Perhaps the text itself would be enough.

Going to cost me another $100 in materials. Wife wants one on a larger beveled edge format.

General Discussion / Re: Etching on mirrors
« on: October 20, 2017, 11:49:11 PM »
They came out incredible!!! This is a small image. Painting with black acrylic did not work. Suspect the laser frosted the glass such that the paint had little effect.

General Discussion / Re: Etching on mirrors
« on: October 20, 2017, 05:13:08 PM »
Was that a 2.5W laser?

General Discussion / Re: Etching on mirrors
« on: October 20, 2017, 03:49:45 PM »
Thanks. Is that speed 100 at full power? Do you know if there are there any toxic elements given off?

General Discussion / Etching on mirrors
« on: October 20, 2017, 02:32:48 PM »
I went to "Michaels for Men" and bought some small mirrors with the intent of etching. Questions:

  1. What power settings?
  2. Etching with fine lines ok?
  3. Are the etched surfaces smooth or glazed?
  4. OK to paint? If ok, what cleaner & paint?

General Discussion / Re: 3 in 1 table
« on: October 20, 2017, 01:25:23 PM »
I'm assuming that Stonemull is the one without the hat.

General Discussion / Re: 3 in 1 table
« on: October 20, 2017, 10:59:47 AM »
"(and safe)" - you forget which corner of the world he is in!!!

If you have the full scale, forget the $ entry number, set at 1000 and you supply a value of 255 you will get approx 25% power, If you have the full scale set at 256 and you supply 1000 you will need to read the source code.

Custom Size Frames / Re: SiXYLaser
« on: October 18, 2017, 10:43:13 PM »
We get a 90% discount on domestic orders so they can markup the exports to Australia.

General Discussion / Re: TTL vs TTL+ PWM?
« on: October 18, 2017, 10:41:34 PM »
I would suspect that the 0-5 is  the control voltage and there is a separate power (12V). I would also assume that it will behave as a PWM  control. Without knowing the specifics, I would not have a clue as to its frequency response. Perhaps you can post some model info and someone will already have the module.

White paper is not a good medium for diode lasers. It reflects rather than absorbs the energy. My 5.5W unit will burn white paper but  the 1.6W does absolutely nothing. I typically use neon colored 3x5 index cards available from most stationary stores for testing. Cost about $2.50US for 100 and they change color with relatively low pow laser beam. Next up is scrap wood. With rectangles you get an indication of burn with and against the grain and how rigid your frame is.

Almost everyone on this forum experienced difficulties getting started. Most of us overcame the limitations and found a useful tool. I bought the laser to cut 3mm plastic parts for robots. A forum user posted success etching slate. The plastic parts are yet to be cut but I have etched at least 100 slate coasters. Doing a bunch tonight with military emblems to give away at a local veterans home.

T2 Engraving / Re: When does the Laser start to Engrave
« on: October 18, 2017, 08:59:55 PM »
I agree with your assessment of the laser hardware but not the quality or licence  agreements and restrictions of T2. I personally use Linux 99% of the time and wrote my own etch/burn application. There are other tools available for gcode generation and laser control.

T2 Software Updates / Re: Updates
« on: October 18, 2017, 05:15:58 PM »
I am also using grbl-1.f and experiencing odd behaviors. In particular, if I send a rounded rectangle with G03 arcs it appears to do the first two ok and then skips the last two. It does return to the origin. Changing the gcode to regular rectangle and/or running grbl-9 works ok. This is with Grblcontroller.

Can anyone explain the magic sequence to enable "weak laser" when in laser mode? I suspect I could:

1. Switch in and out of laser mode
2. Issue a really slow x/y motion command.
3. Write a new M0x function to enable the laser

Custom Size Frames / Re: SiXYLaser
« on: October 18, 2017, 11:07:19 AM »
I buy rails and brackets from

General Discussion / Re: Small engravement on wood
« on: October 16, 2017, 01:32:55 PM »
Please tell more about the brass powder process.

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