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Messages - Stormin Norm

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16
T2 Engraving / TTL laser vs PWM (Analog?)
« on: July 27, 2019, 07:44:37 AM »
So if my research proves true, TTL laser control uses the laser's full power but kicks it on and off very quickly to do the grayscale control, right? (Plus speed settings of course)

PWM, or analog lowers and raises the power to the laser to control how strongly it burns, giving levels of grayscale. (Plus speed settings of course)

First, I havn't seen a definitive answer as to which is better.  But it seems that stronger lasers are usually TTL, right?

Now, here are two pictures of the 3000mw laser and control box that came with my cheap-o ebay engraver:

Note the guts of the control box. Black/Red is Ground/+power going to the control box, feeding from the GRBL motherboard.

Yellow-Red are output to the laser, Blue/Green output to the fan.

Notice that there is an unused pin on the little board, labeled TTL...  Anyone think it might be as simple as running a 3rd wire to the GRBL motherboard to use the TTL control output, or do you guys think this might fry something if the laser/controller maybe isn't set up to use the TTL option?



17
T2 Engraving / Re: poor grayscale burn
« on: July 27, 2019, 07:03:57 AM »
The Raptors look nice! 

Question: There is slight banding going on there.  Would a .18 or .17 resolution finish getting rid of that?  Or better to do diagonal Engraving?

18
T2 Engraving / Re: help setting up?
« on: July 26, 2019, 08:21:50 AM »
Zax, thanks!  Doing the axis calibrations have it spot on now with distances.

ggallant571 - Procedure for dumping the parameters? (Noob here still)

19
T2 Engraving / Re: help setting up?
« on: July 25, 2019, 07:51:32 PM »
Sorry, I missed mentioning the software, but yes, I'm using T2Laser (Demo still).  I did install the 1.1e firmware, but that is when it gave me the 40mm up from the 10mm.  Is there somewhere I can do an edit?

Before I did the 1.1e firmware, I was using a Benbox firmware (Just called LX.hex).

It had the correct size of the 10mm box with the LX firmware, but the x axis motor was always making a slight sound when not moving, and would get hot.

20
T2 Engraving / help setting up?
« on: July 25, 2019, 06:01:09 PM »
Hi all, first time user here, so plz be kind... :-\

I bought the Ebay 65x50mm 3000mw laser engraver kit. (50x65cm 3000MW Area Mini Laser Engraving Machine DIY kit Desktop Laser Printer    Will bring up the exact item)

Assembled it, but I'm using a different controller that has z axis control. (Not using z axis yet)

Here is the controller: (this description brings it up on ebay  ---  USB GRBL 3 Axis Stepper Motor Driver Board Controller Laser CNC Engraving + Case)

Now, I get movement and the laser comes on and off, but when I load the 10mm square from help--samples, it gives me a 40mm square.  Plus, when I had the firmware loaded from Benbox, the laser was MUCH stronger. (However, that firmware would make the x axis motor slowly run hot.  The 1.1e firmware I'm currently using does not run any of the motors hot.

I have it set at 255 laser power.

Is there a different firmware than the grbl 1.1e I'm currently using that I should try?

Thanks!

Norm

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