O Output relays “spindle”, “fan” and “watchdog” (RED LED). O Output direction signal “DIR” output (Green LED). O Output pulse signal “CLK” output (RED LED). All outputs and inputs are brought out via pluggable screw clamp connector for flexibility.Watchdog facility with discrete relay output to insure that all outputs are disabled during PC starting up and software program loading.One analog output (PWM-controlled) for controlling spindle speed.
For pin assignment and addressing refer to table1. Control signals are TTL compatible (10mA).6 axes control signals (Pulse ”CLK” and Direction “DIR”).Completely supports MACH3 and any other softs that use LPT port.This relay works in conjunction with watchdog signal to allow control of external devices.
PPIC1 includes an analog output (0-10V) for controlling spindle speed.Ī very important feature of PPIC1 is the watchdog facility, which disables all outputs until PC is powered and oftware starts up (activating this feature requires a software that supports watchdog facility such as MACH3).Īdditional relay is included to provide external safety. Two output relays are added for spindle and fan control. One of the most important features of PPIC1 is embedded switch mode power supply which provides all the required supply voltages eliminating the need for specific external power source.Output control signals (pulse and direction) should be optically isolated on stepper motor driver. External Input signals are optically isolated from the PC parallel port for safety. It supports up to 6 axes CNC machine control signals pulse/direction for each axis) with extra two duplicated auxiliary output control signals for X and Y axes.PPIC1 supports five inputs to define X, Y and Z axes limits using switches or proximity NPN sensors, in addition to two inputs for emergency and probe or any other inputs. PPIC1 is a complete buffered CNC breakout board. PPIC1 – CNC Parallel Port Interface Card 6 Axis CNC Breakout Board
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