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Linumeric-LPT V3
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 push-pull (forcing 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
Linumeric-LPT V3 has the ability to configure the default input/output state! When using a standard computer LPT port, after turning on the computer or during its startup, the input/output status is not known, sometimes random changes occur, which may cause random control values. With Linumeric-LPT V3 you don't have this problem! We can freely program the default input/output state. Linumeric-LPT V3 comes with a simple Linumeric-LPT V3 configurator application that allows you to test and configure the device (e.g. setting default values or changing the address).
Linumeric-LPT V3 has the ability to configure the pull-up of inputs to the power rails (Pull-up or pull-down), which allows you to connect a wide range of sensors.
Linumeric-LPT V3 is the successor to Linumeric-LPT V1 and V2. The main difference between version 3 and 2/1 is the Ethernet interface, which is more resistant to interference and allows easy connection of the device over a longer distance.
The second important difference is the increase in the input sampling frequency to the same frequency at which the outputs are controlled, which even allows the encoder to be read, which was not possible in the previous version.
Buffering times have also been reduced, which translates into reduced delays.
ATTENTION! You can build the Linumeric-LPT device yourself.
An installation package and instructions on how to build, install, configure and use the device are available for Linumeric-LPT.
Linumeric-LPT V3 is a device designed and manufactured in Poland!
Before purchasing and commissioning, please read the following documents carefully:
