Servo System for CNC Pipe Cutting Machine
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Abstract
This article analyzes the workings of the CNC pipe cutting machine, further introduces how our servo system can be used on the CNC pipe cutter, and also gives several key parameter settings of the servo.
Applications
CNC pipe cutters are widely used in high-precision cutting of borehole casing, welded pipes, piping for high-pressure boilers, line pipes, and bare tubes in petroleum, metallurgical, and bearing industries.
Model Selection
1. Servo feeder system: F-H08BT2/80SD02430E(S)
Servo knife unit: F-H04BT2/60SD01330E(S)
2. Servo functions: position control, pulse orientation, servo alarm output, RS485 feedback torque output
3. Wiring
Servo Knife Unit
| Function | Servo Terminals | PLC Terminals |
| Pulse ( ) | CN1-20 | 24V |
| Orientation ( ) | CN1-19 | 24V |
| Pulse (-) | CN1-7 | Y0 |
| Orientation (-) | CN1-6 | Y2 |
| Servo alarm | CN1-17 | X1 |
| COM- | CN1-18 | COM- |
| RS485 | CN3-2 | RS485 |
| RS485- | CN3-3 | RS485- |
Servo Feeder System
| Function | Servo Terminals | PLC Terminals |
| Pulse ( ) | CN1-20 | 24V |
| Orientation ( ) | CN1-19 | 24V |
| Pulse (-) | CN1-7 | Y1 |
| Orientation (-) | CN1-6 | Y3 |
| Servo alarm | CN1-17 | X2 |
| COM- | CN1-18 | COM- |
| Parameter Code | Parameters | Servo Knife Unit | Servo Feeder |
| PA-1 | Motor code | 31 | 33 |
| PA-5 | Speed loop proportional gain | 180 | 150 |
| PA-7 | Electric current command low-pass filter | 374 | 384 |
| PA-8 | Speed detection low-pass filter | 256 | 256 |
| PA-9 | Position loop proportional gain | 100 | 80 |
| PA-12 | Gear ratio numerator | 2 | 2 |
| PA-13 | Gear ratio denominator | 1 | 1 |
| PA-32 | Speed estimation simulation | 1 | 1 |
| PA-33 | Motor load inertia | 15 | 34 |
| PA-53 | Internal Mechanism Enable | 0001 | 0001 |
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