CNC System

SINUMERIK 840D CNC system, SIMODRIVE 611D AC spindle drive and AC feed drive, 1PH AC spindle servo motor, 1FT6 AC feed servo motor are from SIEMENS, Germany.
Key component NCU of SINUMERIK 840D CNC system combines CPU of CNC system and CPU of PLU, include corresponding CNC software and PLC control software, handwheel and measurement interface, MPI interface, S7 300 extended interface, Slot for PCMCIA card and bus interface of equipment. The SIMUMERIK 840D CNC system connects to SIMODRIVE 611D module by bus interface of equipment, and connects to S7 300 input/output module by S7 300 extended interface. The NC data and PLC data are protected by battery.
Digital control bus is utilized to drive AC servo drive SIMODRIVE 611D, with features of modular design, independent components of spindle and driven components of each axis. The feedback signal of encoder is 1VPP sine signal. The scales can be chosen by user to realize full close loop control.

CNC System Specifications:
Control axes: X, Y, Z, W and spindle (B axis with NC rotary worktable)
Linkage axes: X, Y, Z and W (Any 4 axis linkage can be realized with rotary worktable)
Display: 10.4” color TFT LCD with Chinese/English
Operation panel: OP010 Full function CNC keyboard
Communication interface between human and machine: PCU20 standard
Control panel of machine: Standard with 30 keys and button switches
6 layer data protective
PLC: Internal SIMATIC S7 CPU 315-2DP
Input/output module: Separated S7-300 input/output module by IM361 extended interface
CNC user memory capacity: 3MB is standard to store apply programme and data

CNC Program
Program language: DIN66025 standard language and SINUMERIK senior language
Fixed cycle of drilling and milling process
Metric/Inch program or combined metric and Inch program
Programming and machining at the same time
Absolute/Increment program
Approach to reference point by programming
Variable and parameters caculation
7 layer sub-programme inserted
Program skip and branch
Micro programme
Chamfer/round
Plane selection
Workpiece coordinate

CNC Function
Min. pulse equivalent: Linear axis 0.001mm (Rotary axis 0.001°)
Programme pre-process: 10 paragraphs or more
Compensation function: Backlash clearance compensation, compensation of ballscrew pinch error, compensation of over quadrant error, more flexible tool length compensation and tool radius compensation
Feed function: Rapid feed, Feedrate adjustment, feed per minute, feed per rotation, acceleration limitation of programmable.
Spindle function: Spindle speed, spindle ratio adjustment, auto spindle step selection, spindle orientation stop, speed limitation, cutting with constant speed.
Frame: Coordinate translations, Zoom, coordinate rotation, mirror. Zero offset setting, Programmable Zero offset.
Tapping/Rigid tapping

Interpolation Type
Positioning, stop accurately, linear interpolation of three coordinate, arc interpolation of any two coordinate, helix interpolation (arc + max. two axis linear interpolation), feed pause, thread cutting, cutting synchronous.

Edit Function
Program index, program number index, background edit, teaching, program protective.

Safety Protective Function
Program test function, limitation of programmable machining area, limitation monitor of software, limitation monitor of hardware, emergency stop, static monitor, speed monitor, position monitor, contour monitor. The safety function is always measuring circuit, over heat, battery, voltage and memory.

Operation Method
Auto, DNC, MDA, JOG, REF, Display, incremental (×1, ×10, ×100, ×1000, ×10000), idle run, single block. Auto corner rate/deceleration

Data Transfer
Data input/output through RS232 C serial interface by PC-IN software. PC data and PLC data copied to PC card for resuming system data.

Display
Display current position, real cutting speed, programme, operation error, alarm information, self-diagnose function, Display of NC and PLC status output signal