My Homemade CNC version 2 with USB Driven PIC16F877A Driver

This is the second version of my CNC machine that is capable of cutting plywood. (see version 1)

Skate bearings on L-Iron bars

Home made mechanical encoders. I later removed these and made the system open loop.

The controller software

PSU, Stepper Drivers and PIC

Sketchup Models

X-Axis (bed)

Y-Axis

Y-axis with Z-axis motor attached

Z-axis and router

Components

• 3A Stepper motors (280 oz-in I guess)
• Cheap TB6560 stepper drivers 24V-3A
• Thread bars and double nuts
• Skate bearings
• 24V 10A SMPS
• CP210x USB-TTL module.
• Homemade Firmware (CCS-C) and driver program (VC++)
• PIC16F877A (more than enough)
• 1/4 inch Trim router + 2mm HSS end mill + V-bit