MyNC - Обзор

Обзор

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Graphical user interface: gmync

Work pane

This is the main control view. It includes graphical representation of a loaded program, a set of NCB state values and current tool coordinates. At the bottom the program listing is located, with current frame being highlighted.

Small circles on the graphical display represent current interpolator position and are always located strictly on the cutting path. Larger circles represent current tool coordinates. In case of a 4-axis program they are likely to be slightly shifted from the cutting path according to part height and gaps settings.

Parameters pane

This view allows to change various parameters affecting system's behaviour. The parameters are grouped by subsytems they are related to. Once you change a parameter, the server notifies all other terminals connected to it about the change.

Concrete set of parameters used in a particular MyNC installation is determined by an XML configuration file. If some of the parameters are unnecessary, they can be excluded from the view by editing that file. This also allows to translate parameters names and descriptions to other languages easily.

Editor pane

This is a standalone editor provided for convinience. Here you can check the correctness of your program before loading it into the control block and make some changes if necessary. This editor is also available as a separate application called "gncedit".

Standalone control daemon: myncbd

MyNC is a distributed system. The central part is a "numerical control block", or NCB, which runs as a usermode application with relaxed timing requirements: standard preemptible Linux kernel would do pretty well, -rt versions could also be adopted. The NCB relies upon a low-level subsystem called "mykernel", which operates in a hard real-time environment provided by "-mync" kernel patchset. The task of "mykernel" is to tie up three execution environments: user-mode, kernel-mode, and real-time. Real-time context is a subset of the kernel-mode which runs asynchronously to the rest of the kernel and thus can not transparently access usual kernel data structures. "myncbd" daemon itself holds user-mode NCB code and provides communication interface for control terminals.