CNC External Cylindrical Grinding Machines

PLC as the master motion control module chip, through the

Abstract—The traditional CNC system based on the IPC is
complex structure, high cost, hardware redundancy and can
not be cut, high power consumption and low reliability, this
paper proposed and designed a CNC System of External
Cylindrical Grinding Machines, and gives the software and
hardware architecture design.The CNC system operation
and management of ARM as the master chip module and
I / O modules and servo drives and machine I / O connected
to complete the controlling of grinding machine
motion .Design and Implementation of Embedded CNC
edge Cylindrical Grinder grinding system to overcome the
current shortcomings of the system, with versatility, high
reliability, system flexibility, cost-effective high merits in
line with an open CNC system development needs.
Index Term-embeddedsystem; MMI;ceutter radius
compensation
I. INTRODUCTION
MKS1632 CNC cylindrical grinding machine is a
high-end ARM, as well as programmable logic controller
as the core of the numerical control system, using threeaxis
CNC two-axis can be realized into a sports show,
radial feed movement precise digital control.Processing,
through the man-machine interface, data input processing,
use the control panel to issue a variety of operation
commands. Programmable logic controller inverter
spindle realize stepless speed regulation, in order to meet
the requirements of processing technology. To meet the
processing technology, designed the right cut, left-cut,
continuous processing method, using a radial cut into the
descending spiral of feeding method.In order to improve
machining accuracy, positioning accuracy, backlash
compensation is studied.
DESIGN OF CNC SYSTEM
We designed the CNC system belongs to outline
numerical control system, using semi-closed-loop control
mode.The numerical control system functional modules
shown in Figure 1.
Primarily with the display and manual data entry
keyboard, NC panel, as a central display and input unit;
machine operator panel for manual machine tools,
including processing operation mode, speed,
magnification and other settings as well as various
operational functions; the central control unit ( NC device)used in various components of the installation and
connection, the internal module is equipped with
numerical control, human-computer control module,
programmable logic controller (PLC), network
communication module, monitoring circuit.
All the features of the CNC system consists of two
microprocessors CNC-CPU and the PLC-CPU and the
serial communication interface-sharing, communication
between the various parts of the completion by the
internal bus.CNC-CPU for each channel of data
preprocessing and interpolation calculations. Here, each
one channel is a stand-alone system, with multiple axes
and independent of the CNC machining procedure that
requires a corresponding pre-processing procedures and
the interpolation processing, also asked the various
channels can be parallel processing of NC processing
program, each channel by the PLC is responsible for the
coordination. PLC-CPU instruction by receiving T and M
switch command, a variety of electrical machine control,
machine control panel is also responsible for handling
input.


A. ARM Chip
We use ARM9 S3C2410A microprocessor operation
and management of master-chip modules. S3C2410A
microprocessor is a launch by Samsung's 16/32-bit RISC
processor, it uses the ARM920T core, 0.18um standard
CMOS process of macro-cell and storage unit, it also uses
a technique called Advanced Microcontroller Bus