Hi Ted.

Photos can be changed to Black and White in Photoshop or another 2d softwares. It's available in "Image/Adjustments/Black & White". In another software, it might be a little difference but same same in "Image" or "Edit" menu. After you've changed it to black and white images, hold down " Ctrl + S " or "Command + S" to save it as BMP file. It's grayscale image. Now you can import your pictures to cad/cam software and print it. To make a complicated/professional greyscale like the example you posted, It takes times to practice and require some special skills that needs years.