Linux CNC + Linumeric-LPT V3 (Ethernet - LPT) + Raspberry Pi 4B 8GB / Laptop TEST #1

From the beginning of the Linumeric-LPT project, I have been a faithful supporter because these clever devices www.machmaker.... can solve many problems related to finding a computer for LinuxCNC today my first steps and experiments
Linumeric-LPT V3 is a device that allows you to control a CNC machine such as a milling machine, lathe, robot, etc. using LinuxCNC software from a computer that does not have an LPT port. All you need to control it is a computer with an Ethernet network card.
Linumeric-LPT V3 is an Ethernet-LPT adapter designed specifically for use with LinuxCNC - the successor to Linumeric-LPT V1 and V2. It uses special mechanisms that allow for stable and reliable operation. Thanks to the Jitter Elimination System, almost any computer is suitable for controlling a CNC machine!
Linumeric-LPT V3 is a computer LPT interface that does not change the functionality of LinuxCNC in any way. This device is used in exactly the same way as a standard LPT port and installation in the system is very simple. Additionally, Linumeric-LPT V3 can be used simultaneously with the computer's physical LPT port by simply treating it as a second port.
The DATA and CONTROL registers can be used as inputs or outputs. The STATUS register can be used as inputs.
Linumercic-LPT V3 outputs are of the push-pull type (force a high or low state), they can be used to control motors (step, direction signals), generate a PWM signal or turn on/off devices.
Linumeric-LPT V3 inputs work in OC (Open Collector) mode and can be pulled up (configurable) to the upper or lower power rail (pull-up or pull-down enabled). The inputs can be used to read sensors (end sensors, homing, tool or material measurement, encoder reading, etc.).
Main parameters of Linumeric-LPT V3
Computer interface - Ethernet
Interface with the machine - LPT (DB25 connector with a pinout arrangement identical to the standard LPT port)
Maximum control frequency - 100 kHz
Power supply - 5V from USB
Configurable inputs and outputs
-Jitter reduction mechanism
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