The parallel port breakout board card is designed for a flexible interface between your CNC machine and computer system. The board is fully compatible with software like Mach3, Turbo CNC, LinuxCNC, KCAM etc.

The Breakout Board (BOB) translates signals between the CNC machine and PC while isolating the PC motherboard from electrical surges. The BOB gives step and direction outputs to steppers for up to 4 separate axes. The outputs for X-Axis (or Y, depending on the CNC design) are buffered twice and received from two different connectors to make the board useful for gantry-style machines as well. All the outputs are buffered and received through screw terminals from the board.

These outputs can be received in Pull Up or Pull Down states and the motor Common output signal can be set as low or high by changing the jumper configuration.

Three relays are provided on the board and an isolated PWM to 0-10V analogue output circuit is provided for controlling the spindle speed. An onboard 5V regulator is given with a 5V output terminal.

An onboard charge pump is provided for the safety of the card. It is jumper configurable and it can be operated from frequencies as low as 200Hz to more than 15 kHz. The charge pump can be set disabled and this buffered output can be used as general-purpose output by changing the position of the respective jumper.

Input terminals compatible with 5-24V are given on the board. These are filtered for noise immunity ensuring that there is no error. LED indicators for inputs and outputs make the signal debugging task easy. All the outputs can also be used as general-purpose outputs.

A DB-25 connector and 26-pin box header are required to connect to the PC (Parallel Port Cable)