Panel furniture cutting machines commonly use two types of drive motors : stepper motors and servo motors . The speed of the equipment depends on the control system, but it also depends on the drive motor.
A stepper motor is an open-loop control element that converts electrical pulse signals into angular or linear displacement. Under non-overload conditions, the motor's speed and stopping position depend only on the frequency and number of pulse signals, and are unaffected by changes in load.
A servo motor is an engine that controls mechanical components in a servo system; it is a type of auxiliary motor direct speed change device.
So, which is better for a cutting machine: a stepper motor or a servo motor?
1. Firstly, in terms of control precision, stepper motors have a control precision of 3-5% of their step angle, which is non-cumulative. Their speed is also directly proportional to the pulse frequency, meaning the higher the frequency, the faster the speed. However, if the initial velocity is too high, the acceleration will be too large, sometimes causing "step loss" and then the motor to "jam." The control precision of servo motors is determined by the encoder rotating behind the motor shaft. The more scales on the encoder, the higher the precision. Servo motors are closed-loop control systems. They can convert the received "electrical signals" internally and then feed them back to the driver via the encoder. The driver directly samples the signal fed back from the motor, generally avoiding the "step loss" or "overshoot" phenomena of stepper motors, resulting in more stable performance.
2. If a stepper motor is not properly controlled, it will cause "resonance", which is the low-speed oscillation phenomenon we are talking about. "Oscillation" in a working motor is very detrimental to the motor. However, the AC servo control system of a servo motor has a resonance suppression function, so that resonance will not occur even at low speeds.
3. The output torque of a stepper motor will decrease as the speed increases, and the higher the speed, the faster it decreases. A servo motor, on the other hand, has a constant torque output. The torque will not decrease as the speed increases, and it outputs constant power at the rated speed.
4. Servo motors have a strong ability to withstand overload and can overcome the instantaneous starting torque of the load inertia. Stepper motors often do not have this ability, so when selecting a model, you should choose a model with a larger inertial torque, but often it is not needed.
Servo motors are superior to stepper motors in terms of functionality. However, stepper motors have fewer wiring requirements, simpler programming, fewer malfunctions, and sufficient torque. Stepper motors can reach up to 6000 pulses and a speed of 3000 rpm, while ordinary stepper motors can reach 600 rpm, which is sufficient for some common equipment. Therefore, when selecting a panel saw, the choice of drive motor should also be taken into account when selecting the control system and equipment. If your requirements for the panel saw are not high, you may want to consider a stepper motor. After all, the price difference between stepper motors and servo motors is not small. Reasonable selection can control costs and be economical.
Disclaimer: This article is a reprint. If it involves copyright issues, please contact us promptly for deletion (QQ: 2737591964). We apologize for any inconvenience.
