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Messages - ggallant571

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General Discussion / Re: Odd behavior at low power
« on: October 19, 2020, 06:39:23 PM »
I will check but think that is already set. Even if it isn't set, why get the heavy first pixel. After gaps with zero power it behaves ok. Just the first on every line.

General Discussion / Odd behavior at low power
« on: October 19, 2020, 12:24:35 PM »
I am etching some material that reacts to the laser at low power. My problem is the first pixel on every line, from both directions, is much darker than the rest of the line. I am not sure of the exact length but it looks like single pixel under the microscope.

Engraving / Re: GRBL 1.1e burning weaker
« on: October 11, 2020, 09:26:30 AM »
Looks to me like it is time to fix/cleanup the artwork. Also using a complex image to adjust machine settings can be frustrating.

Engraving / Re: GRBL 1.1e burning weaker
« on: October 08, 2020, 08:44:42 AM »
Look at $110 & $120.

FAQs For New Users / Re: Squiggly lines
« on: October 08, 2020, 08:41:07 AM »
If I recall correctly Steve Nottingham posted a wheel tension adjustment fixture. Might have been 2 or 3 years ago. It fit on the bottom and was designed to reduce the sway.

Engraving / Re: GRBL 1.1e burning weaker
« on: October 07, 2020, 09:44:17 PM »
That make no sense. Perhaps you changed the parameters such as the max rate.

T2 Engraving / Re: GBR files
« on: October 07, 2020, 07:55:22 AM »
Nottingham - I suspect it is the transparency laser. Try disabling it off before inverting.

Trouble Shooting / Re: Connecting the laser directly to the source
« on: October 05, 2020, 10:52:34 PM »
The three wires are GND, +12V, PWM. Traditional colors are GND =BLACK, Power= RED. You need to match the the signal names, not the colors. Looks lie your second picture is designed to use an independent power supply. If your go that route to need to connect the GNDs.

With a 3-wire connection most laser modules use a high (> 2V) to signal ON. The controller firmware drives this signal LOW to turn the laser OFF. If that active drive signal is missing the input on the laser module will float high resulting in a steady ON condition. Many of us have installed pull-down resistors on the PWM line to avoid this condition. I typically use a 3.3K. Cost is about 0.02USD.

Benbox / Re: Need help w/ daughter's laser engraver not burning
« on: October 04, 2020, 05:28:49 PM »
The typical color codes:
   BLACK     - GND
   RED         - +12

Getting 12V between BLACK & YELLOW sounds wrong. Do you see any identification on controller or laser?

T2 Engraving / Re: etching slate
« on: September 27, 2020, 11:28:56 AM »
If I understand correctly you are adding text to an existing etching, Any idea of the process used to create the originate etching?

T2 Engraving / Re: etching slate
« on: September 27, 2020, 09:37:11 AM »
I'm not familiar with "Sketch".

T2 Engraving / Re: etching slate
« on: September 27, 2020, 08:14:55 AM »

There are a lot of 0.2mm burn line segments in the file. The resolution is also set at 0.2mm. I don't know the algorithm used by T2 to convert image resolution but I find that 0.1 works better on slate. I also find the the minimum line length needs to be 0.3mm.

If it is possible post the source art work. James Watson any relation???


LaserGrbl / Re: Copying GRBL
« on: September 26, 2020, 10:34:04 AM »
I don't know why I would want to slow down to 8000. Been cutting 6mm stainless steel in single pass at 24000.

General Discussion / Re: Etching Ceramic Tile
« on: September 26, 2020, 06:49:56 AM »
I am planning on trying the dual color scheme. First layer is a color, second is flat black. Depending on the laser power you burn just the black exposing the color or all the way thru to the tile.

T2 Engraving / Re: etching slate
« on: September 26, 2020, 06:45:24 AM »
Not all slate reacts nicely to diode lasers. I have 3 large boxes (free to me) of gray slate that is immune.

Sealing the surface first helps improve the contrast. The coated slate appears darker while the burn is more gray. I suspect the difference fades with time.

Post your source file and I will take a peek.

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