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KD600 series inverter in CNC lathe application scheme

Overview

CNC  machine  tool  is  the   integrated  application  of  mechanical,  electrical,   hydraulic,  pne- umatic,  microelectronics  and  information  and  other  technologies  as  one  of  the  electrom- echanical  integration  products,  in  the  mechanical  manufacturing  equipment  with  flexible, universal,  high-precision,  high-efficiency  "flexible"  automatic  production  equipment,  it  will process the various operations and steps required and the shape and size of the workpi-ece, with  digital  code,  Through  the  control  medium  into  the  numerical  control  device,  the numerical  control  device  to  the   input  information  processing  and  calculation,  command control  machine  tool  system  and  drive  components,  automatic  processing  of  the  required workpiece. The technical  level of CNC  machine tools  and  its  percentage  in the  output and total ownership of metal cutting machine tools is one of the important indicators to mea-sure the overall level of national economic development and industrial manufacturing of a country. In recent years, the share of CNC machine tools in Chinese enterprises has incre-ased year by year, and it has been more used in large and medium-sized enterprises, and it is also generally used in small and medium-sized enterprises and even individual enterprises.

CNClathe process requirements

  • When the workpiece is processed by CNC lathe, the feed amount is large, the proce-ssing speed is low, and the machining process has impact load due to the uneven surface of the workpiece.
  • Lathefinishing,  the  feed  amount  is  small, in order  to ensure  processing efficiency,  pro- cessing speed is high.
  • The spindle motor is required to have low speed and high torque output, and is stab-le, and can run at high speed.
  • Receiving analog signals requires high linearity and low load interference.
  • Themotor  noise  is small, and  the  interference to the system automation equipment  is small.Speed up and speed down as little as possible.

Advantages of CNClathe KD600 series products

Kd600 series high-performance vector inverter adopts advanced flux control technology, the motor torque at low speed is large, the speed accuracy is high, the price is reasonable, the function  is  complete, with  instantaneous  power  failure  processing  and  speed  tracking  and start again function, to ensure that the system to achieve continuous operation mechanism, to ensure that the motor is running at the highest efficiency state, therefore, Using KD600 series high-performance vector inverter instead of spindle AC servo system is the best choice for machine tool industry. KD600 series inverter has the following features:

  • Unique weak magnetic control technology: can be a good control of low frequency large torque motor, can run in 0 ~ 600Hz.
  • Fastandstable  stop  speed:   magnetic  flux  deceleration  stop  technology  can   make  the motor slowdown and stop in a shorter time.
  • Speed accuracy and stability: the linearity of speed setting is good, the accuracy of speed stability is high, and the fluctuation of speed is within 5/1000 when the load changes.
  •   Excellent  low  frequency  performance:  Optimized  PG-free  vector  control  algorithm,  low frequency  1Hz  up  to  150%  rated  torque  output,  to  ensure  strong  cutting  force  during blank processing.
  • Providemultiple frequency input modes: 2 voltage sources 0 ~ 10V or -10V to +10V input, 1 current source 4~20mA or 0~20mA input.
  •  Wide range of grid voltage application: Advanced switching power supply design can be applied to a variety of grid environments.
  • Exquisite  production  process:  adopt a  unique  coating thickening  process, the air  duct  is completely  isolated  from  the   internal   PCB,  and  has  strong  adaptability  to  the   harsh physical environment such as metal dust, corrosive gas, and humidity.
  • Built-in  leakage absorption circuit greatly  reduces the electric shock to the  human  body when the equipment housing is charged.

Basic wiring diagram

Basic wiring diagram

Parameter Settings and description

Parameter setting

Instructions

Parameter setting

Instructions

P0-03=1

No PG vector mode

P4-01=11KW

Rated power of motor

P0-04=1

The external terminal starts or stops

P4-02=380V

Rated voltage of motor

P0-06=2

The analog quantity AI1 is given

P4-04=22.6A

Rated current of motor

P0-14=150

Maximum output frequency

P4-05=50Hz

Rated frequency of motor

P0-16=150

Upper operating frequency limit

P1-06=1435RPM

Rated motor speed

P0-23=1.0

Acceleration time

P6-00=2

Fault output

P0-24=0.8

Deceleration time

P6-02=1

Frequency converter in operation

P5-00=1

Forward running

P5-01=2

Inverted run

P4-01~P4-06 motor parameters please enter accurately

Debugging result

It has been proved that KD600 series high-performance vector frequency converter can fully meet the  requirements of  machine tool spindle control.  KD600 adopts the  leading  PG-free vector control  mode, which can smoothly output  150% torque  even  under  low  speed  (low frequency)  operation to  meet  the  processing  needs  of  different  parts,  and  can  completely replace the traditional rolling bearing spindle structure, and this spindle structure is simple, compact,  and  can  achieve  true   stepless  speed  regulation.  The  speed  of  this   spindle   is controlled by an external analog signal to control the output frequency in different processing processes  (e.g.  Roughing,  finishing,  etc.)  need  different  speed,  at  this  time,  the  numerical control system can output different analog voltage signals to the inverter to achieve different speed, and the start and stop signal is also controlled by the numerical control system, which improves the degree of automation and extends the service life of the tool.

Debugging result

Post time: Nov-17-2023