Help for makers
CNC Point Tools: frequently asked questions
Answers about photo preparation, depth-map interpretation, file exports, and checks to make in your own CAM software before manufacturing.
Image preparation and generation
How do I prepare a photo for a CNC relief?
Choose a sharp source image with a clear subject, even lighting, and visible midtone detail. Crop it to the intended plaque proportions and leave room around features near the edge. Review the photo preparation guide for more examples of what to inspect.
Can I generate a relief from a photo with a busy background?
You can try it, but a busy or similarly toned background can make the subject boundary harder to interpret. Crop closer or use a clearer image where the subject stands apart. The preview is the place to decide whether the background should be included in the final carving.
Does a single photograph contain enough information for a true 3D scan?
No. The tool estimates visible shape from one image; it cannot see hidden sides or measure real-world dimensions. Generated models are best treated as artistic reliefs or prototypes unless you validate geometry for a specific functional purpose.
Depth maps and CAM
What do the light and dark values mean?
In an 8-bit grayscale image, black is 0 and white is 255. CAM software maps that range onto a physical height range. Which end becomes the high point depends on the import settings, so confirm the direction in the 3D preview and use inversion if needed.
Can I use a map in Aspire, Carveco, Fusion 360, or another CAM program?
Use a height-map or image-to-relief feature if your CAM software supports it. Names and controls vary by product and version. Set the project dimensions and intended relief height, check units and inversion, and simulate the toolpath with the actual stock and cutter before cutting.
Why do small details disappear after carving?
The physical size, map resolution, cutter diameter, stepover, and material all limit the detail that can be reproduced. A detail visible on a large screen may be smaller than the cutter can reach at the selected plaque size. Inspect the CAM preview and simulation, and consider enlarging the design or simplifying fine features.
Exports and manufacturing checks
Why does an STL import at the wrong size?
STL files are not consistently interpreted with units across every application. After import, check width, height, and thickness in your CAM program or slicer and set the intended units explicitly. The 3D relief preflight guide covers the other checks.
Should I choose a depth map, STL, or GLB?
A depth map is useful when CAM will create a relief from image heights. STL is a triangle mesh commonly used for mesh CAM and 3D printing. GLB is useful for 3D viewing and may include visual materials; those textures are not necessarily physical geometry. Use the format supported by the next step of your workflow.
What should I check before machining?
Confirm scale, orientation, stock thickness, perimeter, cutter access, and the simulated path. Check clamps, tool reach, and safe travel moves. Machine parameters depend on your equipment and material; use established shop settings and a test cut when appropriate. See the CAM workflow guide.
Accounts, privacy, and support
How are uploads and generated files retained?
Retention details can change as the service evolves. Check the current privacy policy for the stated handling of uploaded images, generated outputs, account information, and advertising technologies. Only upload images you have the right to use.
How do I ask for help with credits or a failed job?
Email support@cncpoint.co.in with your registered email, approximate time of the issue, and a short description. For a payment question, include the Razorpay payment ID; never send card numbers, UPI PINs, or passwords.