All PSoC Application Notes

AN2068: Design of a Digital Read Out

Although advanced computer numerical control (CNC) machines exist for machining pre- cision parts, a vast number of mechanical parts are still machined by hand. When producing pro- totypes through hand machining, high precision is still necessary. This precision is difficult to find in machines designed for milling by hand. The axis controls on the machines present all sorts of opportunities for slipping and backlash. These machines can be made to incorporate a greater deal of precision through the use of a Digital Read Out. This project outlines the development of a Digital Read Out designed using the Cypress MicroSystems CY8CXXX series microcontroller. The Digital Read Out incorporates measurement readouts for up to four axes through a robust user interface. The axes all have individual controls for clearing and setting each specific measurement value. The project uses a 320x200 backlit LCD display and an analog touch screen creating simple user operation. All the core components are from the CY8CXXX microtroller family.