4.14 Sample Schematic of EStop and Limits Using Relays. Mach3 and its parallel port driver communicate with the machine hardware through one (or.
Controls 3 Unipolar Stepper Motors, for use with CNC Machines. Simple driver with automatic coil shutdown, to ensure efficient operation. Opto-isolated for protection of the P.C. Supports most parallel port based CNC software, such as KCAM. Supports up to 20 watts per Phase. Or 2 Amps per phase. Full Kits with all the parts needed to recreate this Instructable can be purchased on my Website Get a Full 3 Axis CNC Kit with Driver, Stepper Motors, Power Resistors, all the electronics and wire needed, excluding a PSU. 3 Axis CNC Driver Kit, Assembly and Testing can be added. Printed Circuit Boards are Available with Free Shipping and Programmed PIC Microcontrollers can be purchased or Grab the a combined PCB & programmed PIC Microcontroller Included in the ZIP below are the files for the Copper-side, the Top-Side layer, Datasheet and the drill files. The source code is written in Assembly and can be purchased Here Those who purchase Kits or programmed PIC will receive the source code for Free. *UPDATE: Added the HEX files that use the PIC16F876A instead of the 16F870. Disclaimer: Even though this is opto-isolated there still is a danger to your parallel port if a short were to occur. Recreate this project at your own Risk.