This kind of failure is the most common servo motor overload or overcurrent. Simply put, either the work is too heavy, or it itself has a problem, or there is a mess in the line.
Site Common "culprits”
Work people know, Fanuc drive alarm 401 is not entirely electrical things, may also be mechanical in dragging behind:
* Knife cut too fierce, feed rate is too fast, the shaft can not run.
* Screws, guide rails, bearings stalled or worn out.
* Servo motor bearings loose, short-circuit windings.
* Drive heat dissipation is not good, the fan hanged.
* Loose connectors, broken wires, broken insulation.
* CNC parameter change messed up, torque, acceleration set outrageous.
* The workshop temperature is as high as a steamer, the cabinet is full of dust, and even oil mist.
I Usually Check This First
The first time I encountered 401, I cut the power supply, and then manually pushed the shaft - the results of a card a card, like pulling a rusty chain, a check is the screw jammed. Later on, I got used to it:
1. First look at the machinery is not stuck, can not go smoothly to the end. 2. listen to the sound of the motor turning, and then listen to the sound of the motor.
2. Listen to the sound of the motor turn, normal is uniform, with a little "buzz” low-frequency; if there is a "da da” or metal friction sound, we must suspect the bearings.
3. Joints are touched once, the tight tight, the replacement, do not spare a few minutes.
4. Drive fan and heat sink to see if there is no gray blocked.
5. Parameter error, it is best to adjust back to the factory or your record of stable values.
If these are tried, or the machine is still showing alarm, then we have to consider the drive or motor internal problems - this kind of work, it is best to hand over to the maintenance of
Fanuc test platform to do, save time and worry.
Usually How Less Encountered 401
* Don't overload the machine for a long time, feed it what it can chew.
* Shafts, guides, and screws are lubricated on time.
* Keep the control cabinet clean and ventilated.
* Regularly check the cables, especially the ones that are always in motion.
* Fans, filters when old, do not wait for it to go on strike.
If You're Too Lazy to Toss
As an industrial automation parts supplier rooted in Shanghai, China, serving the world.
Songwei has Fanuc drives and other parts in stock, and the Alpha, Alpha i, and Beta series can all match. We can also help you test and repair Fanuc drives directly, and ship them only after running them with real machines. Ship the same day you order, don't let the machine lie down for another day.
