Thank you all for your attention. I’d like to share the key points for spherical laser marking:
Spherical laser marking can be achieved with a basic 2-axis motion control system (a dedicated rotary fixture for the UV direction) plus a 2D galvanometer.
3D graphics are not required either; a flat development drawing is adequate for the process. During simulation, 3D wrapping can be used to observe and adjust the graphic position.
The rotary axis in the UV direction must be concentric and maintain a consistent height – this configuration allows for laser engraving on all 3D axisymmetric products.
For the control motor, AC servo is the preferred choice; it not only offers high speed and high precision, but also eliminates low-speed jitter caused by inertia that would otherwise compromise the marking pattern. 正在上传：S200-1.jpg… 正在上传：S200-2.jpg… 正在上传：S200-3.jpg…
UV direction can be understood as the correspondence between the spherical UV longitude and latitude directions and the XY rotary axis control of the equipment.
It’s like the ‘Engineers Right-Hand Rule’. If your thumb is the X-Axis, your fingers wrap around that line and are conventionally assigned to a rotational U-Axis. Rotation around the Y-Axis is conventionally assigned to the V-Axis. The rotation around the Z-Axis is conventionally assigned to the W-Axis.
On the surface of a sphere, UV direction seems to be handled like Latitude and Longitute. I found this on Stack Overflow.
