My BOB will work on a regular built in port too but when I was making it I was a little worried about blowing a system up. Note: For 24V input signal replace of R3, R4, R5, R6, and R7 with 2K2 Ohms. I also bought a PCI parallel port card with a Netmos 9815 chip on it. J15 is connected directly to parallel port pins for testing purpose. Board has Screw Terminals for Inputs and out connections and also provided with 4X6Pin header connecters for outputs. The board has a total of 12 outputs and 5 inputs. The exact pinout of the port is described in details in this manual. The IDC-26 port has a pinout of a standard LPT port. In mucking around this and other forums, it appears that perhaps there are, or can be, timing problems with that setup due to the PC operating system which may, or may not, be busy with other. This board can be powered with USB input or DC input supply 7V to 36V, keep jumper J2 open in case of USB supply input. The UCSB is a single port signal breakout board making the wiring and connections to 1 standard pinout LPT port on a motion controller easy. So my cnc kit came with a 24 volt power supply, break out board and a parallel port cable to attach my breakout board to my PCs parallel printer port.
All inputs has 470E for current controlled and TTL Voltage input required driving the inputs. The board has 12 output pins that can control various devices such as stepping motor drivers, AC Servo Driver, DC Servo Driver, Plasma Torch, Pump for coolant, spindle, 5 Input pins are provided for limit or home switches, feedbacks, Emergency switch. All outputs are buffered, all inputs are optical isolated and can be used as emergency switch, limit switch and home switch. The board has been tested with MACH3 CNC software. Parallel ports are a direct connection from the processor commonly referred to as GPIO pins (General Purpose I/O pins) and provides a convenient and powerful.
#Parrallel port cnc breakout board wiring driver
Parallel port I/O break out board designed for Hobby CNC, Routers and Motion controller, This Board is an easy solution to driver stepper Motor driver, AC Servo (with Step-DIR Driver) and DC servo (with Step-DIR Driver), The Board is compatible with various CNC software specially made for LPT port data out.