Linumeric-LPT 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 without an LPT port. Linumeric-LPT is an absolute NEW! All you need to control is a computer with a USB interface!
Linumeric-LPT is a USB-LPT adapter designed specifically for use with LinuxCNC. It uses special mechanisms that allow stable and reliable work even with a computer that has high delay values (Jitter) up to 200ms! Because the device has Jitter elimination mechanism, almost every computer is suitable for controlling a CNC machine! Linumeric-LPT is a computer LPT interface that does not change the functionality of LinuxCNC in any way. Linumeric-LPT is used just like the standard LPT port and installation in the system is very easy. In addition, Linumeric-LPT can be used simultaneously with the physical LPT port of a computer simply by treating it as a second port. Two Linumeric-LPT devices can be installed in the system at the same time.
Linumeric-LPT on the DB25 connector has the same registers as the standard LPT port:
The DATA and CONTROL registers can be used as inputs or outputs. The STATUS register can be used as inputs.
Linumercic-LPT outputs force high or low state, can be used to control motors (step and direction signals), generate PWM signal or turn devices on / off.
Linumeric-LPT inputs work in OC mode (Open collector) and by default are pulled to the upper power rail (pull-up enabled). The input is activated by shorting the input to ground. Inputs can be used to read sensors (limit sensors, homing, tool or material measurement).
Main parameters of Linumeric-LPT
- Computer interface - USB
- Interface with the machine - LPT (DB25 connector with pin configuration identical to the standard LPT port)
- Maximum control frequency - 150 kHz
- Inputs read - reaction to any input status change. Not more often than every 20 ms.
- Power supply - 5V from USB
- Configurable inputs and outputs
- Possibility of 2 devices working simultaneously
- Jitter reduction mechanism
Linumeric-LPT has the ability to configure the default I / O values! When using the standard LPT port of the computer, after turning on the computer or during its startup, the values of the I / O is unknown, sometimes there are some random changes which may cause random control values. There is no problem with Linumeric-LPT! We can freely program the default I / O values. Linumeric-LPT has a dedicated Linumeric-LPT configurator application which allows testing and configuring the device (e.g. setting default values or changing the address).
An installation package and instructions on how to install, configure and use the device are available for Linumeric-LPT.
Linumeric-LPT is a device designed and manufactured in Poland!