CNC|為什麼要用花崗岩做機台!?

花崗石的特性，震動阻尼良好、動態特性佳的特性。
此外，花崗石的熱傳導係數低，受熱源及工作環境溫度變化影響較小，
能維持機台良好穏定度，可提昇加工件精度與穏定性，
且花崗石抗鏽、耐酸鹼的特性，也易於日常保養工作。

PLC | mask cable connection? One side, both sides of the ground PART-2

[http://vkinngworld.blogspot.com/]


In the previous article, one might think,
Is to one side seems to be grounded!!


In actual fact, you should look at both sides of the equipment is grounded and fixed!!


If the wiring between the motor with the controller,mask cable(ground line) will  take 1  sides ,
Because the motor has a ground with the controller.


But if it is between the controller with external sensor,
mask cable(ground line) will  take 2 sides,
Because the sensor is not grounded, a ground controller.


So mask cable, isolation
To take a side or2 side ground, depending on the situation,
Not every case is appropriate.

PLC | mask cable connection? One side, both sides of the ground

[http://vkinngworld.blogspot.com/]


Are usually popular only take one side,
Can not both sides to ground.


Reason? WHY?
Check a lot of pages are finding out why.


I summarized this principle should be!!


Ground controllers, ground with other big power line can not be connected in series,
To be connected with the star-ground,
Is the fear of series equipment to the back-ground line,
Is not a zero potential.


So ☆ ground terminals each device will have different potential ☆


And because: each device ground terminals, have different potential


So: When the mask wire to ground connection on both sides, it will have a great current (magnetic field),
But affects the inside of the signal line.


V = the potential difference on both sides of the ground (assuming = 10V)
R = resistance of shielded cable (less than 10 ohms)

A = V / R = 10V/10 ohms = 1A