Using Corel to Convert a RASTER image file to 1-Bit BMP type for engraving with LaserCut ...
Doing this conversion is sometimes easier to complete if you use MS Paint, Corel, and LaserCut 5.3. please follow the steps laid out here. I will be using the A2MASK76.bmp as my starting file.
1) Open the A2MASK76.bmp file in MS Paint.
2) Use the "Erase" and "Fill" tools to remove the background.
4) With all the background colors removed, save te file. It is best to save as a new file name such as A2MASK76_NoBackground.bmp.
1) Open a new project in Corel.
2) Select menu to import a file.
3) Import the modified BMP graphic file.
4) Place the graphic on the Corel workspace.
5) Select the menu item to resample the picture.
6) Please select these settings to make it easier for Corel to tune the picture into a vector image. Setting of 400 DPI is nice for converting to 1-bit Black and white. Make sure your image size will be appropriate for your engraving project.
7) Select the menu item to convert the image to a 1-bit graphic.
8) Select the proper settings in the [Convert to 1-Bit] window. I prefer the [Floyde-Steinberg] method. You can select your setting for your preferences according to your pictures. Save by clicking on the [OK] button.
9) The newly made raster image will replace the old BMP image. The new image may appear fuzzy or made wrong. The computer screen may not show it correctly at certain viewed/zoomed distances, but please know that it is correct. You need to show the [Object Properties] tab and set the [Fill Type] = No Fill. Select the new raster image and then select the menu item to export the image. *** The raster image will be ready for LaserCut 5.3, but needs to be used only at the saved DPI(dots per inch).
The image is now converted to Black and White. The 1-bit conversion can be a high resolution such that the results appear to be grayscale. This type of artwork is known as "Stipple".
10) Select the file DXF type, location, and name.
11) Select the BMP Settings as Mode: Black and White, Resolusion(as resampled before), same size as resampled to. These settings greatly effect the 1-bit appearance of the image.
12) Close or minimize the Corel Project.
13) I used MSPaint to verify the file conversion worked correctly and looks very nice.
14) Open LaserCut 5.3 with a new project or into your existing project.
15) Select menu to import a file.
16) Select the Black and White BMP file to import. LaserCut will only work with a true Black and WHite BMP file. Lasercut can import other filetypes that are greyscale or color, but will convert those itself.. Not always a good result.
17) The file is imported. Notice the graphic has a thin outline. The border will NOT be engraved. The color of the outline depicts what layer the image was inserted onto. If the outline is red and shows small black nodes, then this can indicate that the picture object is selected. I prefer to NEVER put anything on the RED layer. Items on the RED layer can be mistaken as being selected or NOT. Make sure the image is on a layer that is declared to be used for an ENGRAVE Function.
18) Find the Black layer and Double-Click on the speed value(Shown here as 200). Select the Engraving settings appropriate for this image. The SCAN GAP is found as 25.4/DPI. 25.4/400 = 0.0635 ... A good speed is 300mm/second. I have set my power output as 50 percent of my 60 watt laser.
19) Select menu to save the file.
20) Declare the file name and location to save the file.
21) Use the Download Manager to send the project to the laser machine.
Project file .. 1-Bit
My original A2MASK76.bmp File
The new 1-bit image that was created with Corel ... A2MASK76_BW_floyd.bmp (192DPI)
The new 1-bit image that was created with Corel ... A2MASK76_1BIT.bmp (400DPI)