For small and medium-sized CNC vertical lathes, if you need to process disc workpieces with full protection, require high precision and rigidity, and support customization, the following are some suggestions:

1. Choose the appropriate specification and model: Consider your processing needs and workpiece size, and choose the appropriate small and medium-sized CNC vertical lathe. Ensure that the machine tool has sufficient rigidity and stability to meet the requirements of high-precision processing and can adapt to customized processing needs.
2. Consider the CNC system and programming capabilities: Choose a CNC vertical lathe with advanced CNC systems and programming capabilities. A good CNC system can provide precise positioning control and efficient processing program writing. Make sure the system supports customization capabilities so that processing can be tailored to your specific needs.
3. Understand cutting tools and tool systems: Understand the appropriate cutting tools and tool systems for processing disk workpieces. Consider the workpiece material and processing requirements, and select the material, shape, size and other parameters of the tool. Ensure that the tool system has good rigidity and stability to ensure high-precision and smooth cutting operations.
4. Consider workpiece clamping and positioning: For fully protected processing of disc workpieces, select appropriate workpiece fixtures and clamping methods. Ensure that the workpiece can be stably clamped on the workbench and accurately positioned for accurate processing.
5. Customized support: Communicate with CNC vertical lathe suppliers or manufacturers and clarify your customized processing needs. Provide design drawings and processing requirements of the workpiece so that they can be customized and adjusted accordingly according to your needs.
6. Accuracy detection and adjustment: Before processing, perform accuracy detection and adjustment. Use appropriate measuring equipment and tools to measure the geometric accuracy and machining accuracy of the machine tool, and make adjustments as needed to ensure that high-precision machining requirements are met.

It needs to be clear that customized small and medium-sized CNC vertical lathes usually need to cooperate with suppliers or manufacturers, and design and configure according to specific needs. You can consult the machine tool supplier and provide detailed requirements to obtain more specific technical support and customized solutions.