Many people ask me: "Fanuc's robot in the end with what motor?” -- in fact, not complicated, but the inside of the motor. -Actually not complicated, but inside the doorway is quite a lot. I'll run you through it from my experience in repairing, rebuilding, and debugging.
Servo Motor: Fanuc's "Heart Muscle”
When it comes to Fanuc, the most common is the servo motor (
Servo Motor). This thing is fast, accurate, torque, like a robot installed a super-sensitive nervous system.
I once tuned a Fanuc welding robot in an automotive parts factory, welding spot pitch requirements ± 0.1 mm. It uses Fanuc α series servo motors, with servo drive, action is crisp and clean, spot welding gun drop almost every time right in the center of the target. The advantage of the servo is - no matter how fast or slow the speed, it can adjust the torque at any time, climbing, turning, stopping in a hurry are not ambiguous.
Advantages of servo motors:
* High accuracy with minimal positioning error.
* Low energy consumption but high efficiency, fast speed response.
* Resistant to load change ability, especially suitable for welding, assembly, carving these "hand to steady” types of work.
Stepper Motor: Do Light Work "Precise Small Work”
Stepper motor in Fanuc robot is not used much, but in some light, low-speed, repetitive action of the workstation can be seen. They are of the "step-by-step” type, where each revolution is at a fixed angle, like the second hand of a clock.
Once in a food factory, I saw a small Fanuc sorting robot arm with a stepper motor. Its job was to swing the cookies piece by piece into a tray on a conveyor belt, not aiming for ultra-high speed, but the position had to be spot on. Here's where stepper motors come in - simple structure, easy to control, and a servo-friendly price tag.
Advantages of stepper motors:
* Low cost and easy maintenance.
* High positioning accuracy (good enough for low-speed tasks).
* No need for complex feedback systems, and control circuits are less cumbersome.
DC Motor: Stable Output of the "Old Bull”
DC Motor is seldom used as the main drive on Fanuc robots, and is generally used for auxiliary parts, such as internal conveyors, gripper drives, and certain low-load rotary platforms. It is characterized by - stable speed and consistent torque output.
I helped a metal processing plant to replace a Fanuc robot work fixture, the jaws of the opening and closing is driven by a small DC motor. Although its accuracy, response is not as good as the servo, but it is durable, easy to control, bad direct replacement, almost no debugging.
Advantages of DC motor:
* Stable speed, continuous torque.
* Simple control, easy to replace.
* The power supply requirements are not high.
Select Motor Experience Words
Select motor is actually three things: look at the task, look at the load, look at the budget.
* Complex tasks, high precision requirements → on the servo, do not hesitate.
* Light load, repetitive positioning tasks → stepper is enough.
* Low-speed stable transmission → DC reliable.
In addition, the motor and drive to match, like the car engine and transmission, do not match, either the performance is discounted or prone to failure.
To Be Honest
Fanuc robot motor type is not much, but where to use, how to match, is the key to determine its performance. Don't just look at the parameter table, more combined with the needs of the workplace to choose, in order to let the equipment "run fast, stop steadily, use for a long time”.
If you have Fanuc robots to replace the motor, or confused with what model is appropriate,
Songwei this side of the perennial Fanuc system maintenance and transformation, spare parts complete, can help you choose, can help you install, but also help you adjust to the best state. Equipment can not be stopped for too long, drag a day is money ah.
