Application of Spindle of Machine Tool
V11 ACI Inverter in CNC Lathe Spindle Control Program
Ò»¡¢CNC Lathe Work Site Photos
¶þ¡¢Basic Requirements for Machining Operations of CNC Lathe
1¡¢ High cutting precision
2¡¢High stability, complex processing, irregular shape parts of the high pass rate
3¡¢ High flexibility, low impact, the requirements of the control system response speed
4¡¢High productivity
Èý¡¢V11 Variable Frequency Control System Configuration and Schematic
1¡¢Control system configuration
¢Ù V11 frequency inverter ¢ÚSpindle motor ¢Û Transmission part ¢Ü Numerical control operating system ¢Ý Encoder ¢Þ£¨PG¿¨£© Drive (PG card)
Note: install encoder, PG card as optional, selected according to the closed-loop vector control system for machining process.
2¡¢System schematic diagram:
ËÄ¡¢Advantages of V11 frequency conversion control system
1¡¢Fully satisfy the requirement of high productivity, high cutting accuracy, good stability, high flexibility and fast response speed.
2¡¢V11 vector control mode, dynamic response speed is very fast, so that the motor spindle can be high-speed and stable operation.
3¡¢Meet the complex and irregular shape parts processing requirements, in the low frequency state (1Hz), can maintain 100% of the output torque, so as to ensure the stable operation of the spindle in low frequency.
4¡¢Plus deceleration time can be set to 0.1 seconds to achieve fast forward and reverse operation.
5¡¢Strong anti-interference ability, through strict CNC comprehensive test, will not cause any disturbance to the system.
6¡¢The speed is high, the rate of change is small at low speed, and the operation is stable.
Îå¡¢System Characteristics and Wiring Diagram of CNC Lathe
1¡¢The NC lathe system is controlled by two signals to control the rotation of the main shaft of the lathe: One is to simulate the voltage signal 0~10V input, and the other is to simulate the current signal.
2¡¢The system requires that the spindle of the lathe can be quickly and quickly switched to run.
3¡¢Basic wiring diagram:
Áù¡¢V11 Variable Frequency Control System Main Operation Steps and Parameter Setting Table
1¡¢From the start of motor and load, frequency converter, motor parameters self-learning (correct input motor nameplate parameters).
2¡¢Select the vector control mode (SVC), and then enter the required parameters of the system.
3¡¢The specific parameters are set as follows:
Function code | Function description | Setting value | Function notes |
F0.00 | Control mode selection | 0 | Speed sensorless vector control (open loop SVC vector control) |
F0.01 | Start stop signal selection | 1 | External terminal start stop |
F0.03 | Frequency source selection | 2 (VI) | (user can choose) analog voltage signal |
F0.10 | Maximum output frequency | 100HZ | Set by user requirements |
F0.12 | Operating frequency upper limit | 100HZ | |
F0.18 | 1 Acceleration time 1 | 0.5S | |
F019 | 1 Deceleration time 1 | 0.5S | |
F1.06 | DC braking frequency | 0.5HZ | External braking resistor |
F1.07 | Down DC braking waiting time | 0 | |
F1.08 | DC braking current | 60 | External braking resistor |
F1.09 | DC braking time | 2S | |
F2.01 | Motor rated power | 4KW | Motor nameplate parameters |
F2.02 | Rated frequency of motor | 50HZ | |
F2.03 | Motor rated speed | 1460 | |
F2.04 | Rated voltage of motor | 380V | |
F2.05 | Motor rated current | 8.8A | |
F2.11 | Motor parameter identification | 1 | Complete identification of the motor (to be separated from the load) |
F3.06 | VC slip compensation coefficient | Set by user requirements | |
F3.07 | Torque limit setting | ||
F5.13 | VI lower limit value | 0.00V | According to the actual requirements of the root user to change |
F5.14 | VI lower limit set | 0.0% | |
F5.15 | VI upper limit value | 5 | |
F5.16 | VI upper limit set | 100 | |
F5.17 | VI input filtering time | 0.10 | |
F5.18 | CI lower limit value | 4 | |
F5.19 | CI lower limit set | 0.0% | |
F5.20 | CI upper limit value | 20.0 | |
F5.21 | CI upper limit set | 100 | |
F5.22 | CI input filtering time | 0.10 |
Æß¡¢Application
The frequency conversion control system of the numerical control lathe is only one of the many applications of V11. V11 inverter control chip using high-performance DSP chips produced in the United states with high speed. As the domestic high-end inverter, its excellent quality and performance can meet the practical application requirements.
Attached: V11 inverter in the numerical control lathe on the measured data:
1¡¢Configuration of NC Lathe
Motor Rated Power | Rated Voltage of Motor | Motor Rated Current | Motor Rated Speed | Analog Signal |
4KW | 380V | 8.8A | 1480 | 0~5V |
2¡¢Operation Data
Inverter Type | Inverter Rated Power | Motor Operating Frequency | Acceleration time | Deceleration Time | DC Brake | Braking Frequency | Brake Current | Braking Time | Shutdown Current | Braking Efficiency |
V11 | 4KW | 90HZ | 0.5S | 0.5S | Open | 0.5HZ | 60% | 2S | 8.9A | On time brake |
3¡¢Shutdown Current and Low Frequency Torque
Inverter Type | Shutdown Current (plus deceleration time setting) | Low Frequency Torque | ||
1Ãë | 0.3Ãë | 0.1Ãë | ||
V11 | 9.5A | 10.6A (on time brake, smooth start stop) | 11.6A (bus voltage stability, on time brake) | 0.5HZ, 100% rated torque |