CNC Grinding Machines

spindle drive system and the AC spindle drive system.

Architecture (AMBA) a new bus architecture, and its low
power consumption, streamlining and excellent all-static
design is particularly suitable for cost-and power-sensitive
applications. In order to reduce the total cost of the entire
system and reduce external components, S3C2410A
provides the following extensive internal equipment:
separate 16KB Instruction Cache and 16KB of data Cache,
MMU virtual memory management, LCD controller
(supports STN & TFT), NAND Flash controller, System
Manager (chip select logic and SDRAM controller), 3-
channel UART, 4-channel DMA, 4-channel PWM timer,
general-purpose I / O ports, RTC, 8-channel 10-bit ADC
and touch screen interface, IIC-BUS interface, IIS -BUS
interface, USB host, USB device, SD master card &
MMC card interface, 2-channel SPI and the internal PLL
clock multiplier[3].
Programmable Logic Controller
Programmable Logic Controller PC (Programmable
Controller) also known as programmable logic controller,
PLC (Programmable Logic Controller), is a digital
computing operation of an electronic system designed for
industrial environment applications.
PLC model of a wide range, which is mainly by the
central processing unit CPU, memory, input, output and
other components. We use the Mitsubishi FX2N series
produced in micro-programmable logic controller,
according to the input and output points, the number of
selected FX2N-64MT, as shown in Figure 2. When an
external contact is closed, + 24V voltage is added to the
receiver circuit, after filtering and level conversion
processing, the output to the PLC internal, the internal
electronic circuit can receive and process
signals.Receiving circuit coupled with photoelectric
conversion circuit, the switch input signal is machine-side
switches, buttons, relay contacts, testing sensors
acquisition closed / disconnected state of the signal. The
state signal is subject to photoelectric conversion circuit
coupled processing, in order to become a PLC can receive
signals. When using an active switch period (such as noncontact
switch, Hall switches, etc.) must be used DC24V
specifications, test components, NPN / PNP model must
be consistent PLC interface electrical specifications.PLC
output circuit is generally relay output, transistor output,
thyristor output, maximum output current is typically 100
mA or so, can drive light-emitting diodes, a small relay
coils, etc., in addition to be able, through relays, thyristor
and so enlarged re-exported to the external interface.
Relay and thyristor outputs a larger load capacity can
reach 2 A above, to drive solenoid valve and AC contactorTouch Screen
Man-machine interface is in operation personnel and
equipment for two-way communication between the
bridge, the user can freely combination of text, buttons,
graphics, digital, etc. to deal with or monitor the
management and change information at any time to cope
with multi-function display screen. The use of manmachine
interface allows the machine wiring
standardization, simplification, but also can reduce the
required PLC controller, I / O points. Reduce production
costs at the same time, due to miniaturization of the
control panel and high-performance, increase the added
value of the entire device. As a new touch-screen humanmachine
interface, from the appearance of a concern, it's
easy to use, powerful features and excellent stability make
it ideally suited for industrial environments, and even can
be used in daily life, the application a very broad [8].
Figure 3 for the MT500 series touch screen.
Figure3. MT500 SERIES TOUCH SCREEN
MT500 series touch screen is designed for PLC
applications, it is different from a few simple instrument,
or some other simple control of PLC equipment, its
powerful, easy to use, suitable for modern industry is
growing workload and functional requirements [9].MT500
series touch screen COM1 and COM2 can be connected
with the PLC, if it is to use COM2 connection, wiring
shown in Figure 4.
Figure4． COM2 and PLC wiring diagram
Spindle driving and control system
CNC machine tool spindle drive system has a DC
With the micro-electronics technology, communication
theory and speed the development of high-power
semiconductor technology, communication-driven into the
use phase.In this paper, Cage AC Motor Frequency
transform configuration vector spindle drive system. This
is because the cage AC motors DC motors do not have
mechanical trouble and change to bring in high-speed,
high-power to the restrictions imposed, while the other
hand, the performance of AC drive has reached the level