Author Topic: T2Laser and 15W Laser Engraver  (Read 376 times)

JamesManalang

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T2Laser and 15W Laser Engraver
« on: January 15, 2019, 11:11:28 PM »
Hello,

I'm just new on Laser Engraver. I have new 15W Laser Engraver comes with Benbox software.
My project is to make our company Nameplate using this machine.

Using the Benbox software, i cannot find the way to lower the Laser power, it burns out on every sides.
Please see Pic 1.

I search on the Internet and join this Forum, i learned that T2Laser software could be an alternative to make this machine works.
But i also encounter problem, every time i click the  Control Laser to start sending, the laser light burns the starting point.
Please see Pic 2.

Then i also try to engrave on Metal Nameplate(shiny) but shows nothing, i would like to know what settings i should adjust.
Please see Pic 3

Hope someone can help me on configuration of T2Laser.

Thank you in advance.
James.


 

Zax

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Re: T2Laser and 15W Laser Engraver
« Reply #1 on: January 16, 2019, 04:28:47 AM »
Did you use my default firmware with T2Laser or was it still the Benbox?

The initial dot, is that when it starts to burn or are you talking about the "flash" when you switch the the laser controller?

If it's the latter, that's normal - anytime you power up the Nano (connect USB) it will do that during Grbl boot up.

It's not a problem with T2Laser or Grbl, it's a hardware design issue. A pull down resistor will solve it.

ggallant571

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Re: T2Laser and 15W Laser Engraver
« Reply #2 on: January 16, 2019, 06:34:33 AM »
What is the material you are etching?
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JamesManalang

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Re: T2Laser and 15W Laser Engraver
« Reply #3 on: January 16, 2019, 03:26:08 PM »
Hello Zax,

Yes, i used your default firmware.
From the menu when i click on Control Laser icon, it do the initial burn, please check the pic below.
Even on wood material, any material i believe once it initialize Control Laser, it will do the initial burn.

What is pull down resistor?

Please help.

Thanks,
James

JamesManalang

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Re: T2Laser and 15W Laser Engraver
« Reply #4 on: January 16, 2019, 03:35:53 PM »
Hello Zax,

Another issue i encounter when i typed Text, i have to check Flip Y-Axis
if not it will get print inverted. Please see attached pic.

Is this normal on the software design? Or i missed something on configuration?
Please advise.

Thanks,
Donald

JamesManalang

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Re: T2Laser and 15W Laser Engraver
« Reply #5 on: January 16, 2019, 03:42:18 PM »
hi ggallant571,

For the oblong shape nameplate, it's only plastic with silver color shade.
For the rectangular nameplate, it's metal but shiny gold. - i tried to adjust the laser power setting to 255 but still nothing show after it engrave.
I don't know which settings i missed to engrave on metal. Can you share some info?

Thanks,
Donald

Stonemull

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Re: T2Laser and 15W Laser Engraver
« Reply #6 on: January 16, 2019, 04:28:26 PM »
These low power lasers are going to struggle to even leave a mark on metal, the surface conducts heat away. Your material is designed to have the top physically removed with an engraving bit.

Perhaps you can mark it by painting it and hitting that with the laser, then cleaning off the paint but I very much doubt it.



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Zax

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Re: T2Laser and 15W Laser Engraver
« Reply #7 on: January 16, 2019, 04:59:48 PM »
Another issue i encounter when i typed Text, i have to check Flip Y-Axis
if not it will get print inverted. Please see attached pic.

Is this normal on the software design? Or i missed something on configuration?

No this is not normal, it sounds like you have the Y axis reversed, In the settings menu on laser controller just select Reverse Y-Axis. You want the arrow icons to match the direction of laser movement.

Zax

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Re: T2Laser and 15W Laser Engraver
« Reply #8 on: January 16, 2019, 05:06:41 PM »
From the menu when i click on Control Laser icon, it do the initial burn, please check the pic below.

Yes, that's a common issue due to a floating input while Grbl boots up (before the laser is under firmware control).

The Nano begins the boot up process when you connect, during this brief moment the outputs are floating (neither on or off). This is before T2Laser gets any control.

The solution, which should have been part of the laser driver is to add a pull down resistor on the TTL input. You can put a 1kohm resistor between the TTL (S-pin) and GND (- pin) at the laser or controller.

Without this fail safe pull down resistor If the computer crashes, Grbl fails or even if the USB cable gets pulled out the laser will go on full power which is extremely dangerous.

ggallant571

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Re: T2Laser and 15W Laser Engraver
« Reply #9 on: January 16, 2019, 07:45:23 PM »
As Stonemull said, these low power lasers are not the best tool for engraving metals. A user reported using mustard but that seems to have gone nowhere. You can try Google "laser etching metal spray" for some surface preparation chemicals. Most are designed to work with the more powerful CO2 machines.

I have not tried it but expect anodized aluminum is etchable as the local pet stores sell dog tags that appear to be cut with a low power laser.

Be extra careful shining a laser beam on metal. The reflections will be quite strong and random.

Should you be successful, please post the recipe and some pictures of the burn.

 
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JamesManalang

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Re: T2Laser and 15W Laser Engraver
« Reply #10 on: January 17, 2019, 05:01:02 PM »
Dear Zax,

{The solution, which should have been part of the laser driver is to add a pull down resistor on the TTL input. You can put a 1kohm resistor between the TTL (S-pin) and GND (- pin) at the laser or controller.}

Can you share me picture on how i can put this resistor? I don't want to get mistakes and breaks the machine.

Thank you.


JamesManalang

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Re: T2Laser and 15W Laser Engraver
« Reply #11 on: January 17, 2019, 05:05:39 PM »
Hi ggallant571 / Stonemull ,

I will try your recommendations, i will look for that spray and share with you the results.
Very much appreciated.

Thank you.

ggallant571

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Re: T2Laser and 15W Laser Engraver
« Reply #12 on: January 17, 2019, 07:50:04 PM »
The resistor can be soldered at few points. Whichever is easiest. If you are lucky the boards will be marked with something like PWM, GND, 12V. Lacking that, the 3-wire cable typically is colored with:

     BLACK  -- GND
     RED      -- +12V
     other     -- PWM
 
You can solder the resistor to the exposed pins on the back side of the header.
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JamesManalang

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Re: T2Laser and 15W Laser Engraver
« Reply #13 on: January 21, 2019, 09:40:55 PM »
Dear Zax,

How will i saved my template?, i want every time the user open the T2 Laser software, they will select my customized template and they will just changed the Name to be engraved.
Can you send me screenshot how to do this please.

Thank you.


JamesManalang

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Re: T2Laser and 15W Laser Engraver
« Reply #14 on: January 21, 2019, 09:52:03 PM »
Hi ggallant571,

Attached here the picture, can you specify the location where i can solder the resistor?

Thank you.