StuartB4
commented
5 years ago Hi.
Usually when you load an image in to LaserGRBL you prepare it for engraving by setting things like brightness, contrast and the burning method either Line To Line, 1Bit BW Dithering, Vector or Centerline.
Like in this image:
Then you select Next and you should get this screen. What ever size you type in the W box it will resize the image but keep the aspect ratio correct, so it will change the numbers in the H box correctly.
Make sure you Press Enter after changing the numbers.
So if your original image was 200 x 200 and you resize it to 70 in the W box it will change the H box to 70 as well.
Then select the Engraving Speed at the top and and any other settings you need to change and click Create. That should give you the size you want.
You can preview where the image will be on the material your are engraving.
You need to make a custom button.
Right click on an empty part of the bar at the bottom of the main window and click Add Custom Button.
When the window pops up copy and paste this code in to the GCode box:
M3 S2 F900 G0 X[left] Y[bottom] G1 X[right] G1 Y[top] G1 X[left] G1 Y[bottom] G0 X0 Y0 F4000 M5
Then enter a Tooltip (anything you want) in the next box down and then select Idle Program from the drop down selector underneath that and click Save. You should now have an extra button on the main window bar at the bottom. To use the button you need to be connected, then select your image and prepare it like earlier. When you've clicked Create you should be able to press the Custom button you made and it should draw a box around where it is going to engrave, it will put the laser on in low power mode so you can see where it goes and you can position your material. Then it will switch the laser off and return to the home position ready to engrave.
Anel1210
Hi. I have nothing to zero knowledge about technology, over and above the way I am showed (mostly be youtube video) how to do something. I have recently bought the GK4545Pro Laser Engraver/Cutter and with it i was told to install the LaserGBRL software. What a mission it was, but needless to say, I managed to get it done after 2 weeks. I now only have a problem with the sizing of the image. When i select for example 100mmx100mm, the actual image does not turn out to be the same size as what i have selected. So when i want to do a specific size, i am either to large for my material or too small. I need your assistance, if possible in a video how to set the sizing so that it would be correct and accurate (or as accurate as possible). then I would also like to know if there is a way that you can preview your image before you start? And also if there is a way where you can select your size for the X and the Y without the program keeping it in aspect ratio. Please help this dummy (i think i am the queen of the dummy books).