The stone carving machine is damaged. Let's see how to solve it first. If the spindle motor of the stone engraving machine is hot and hot, we must pay attention. If it is not handled early, the lubrication and service life of the spindle bearing of the machine tool will be affected, and the use of the overall spindle will also be affected.

步進電機內部結構全部都是由鐵芯和繞組線圈組成的。繞組有電阻，通電會形成損耗，損耗大小與電阻和電流的平方成正比，這就是銅隕，假如電流不是標準的直流或正弦波，還會形成諧波損耗；鐵心有磁滯渦流效應，在交變磁場中也會形成損耗，其大小與材料、電流、頻率、電壓有關，這叫鐵損。

The internal structure of stepping motor is composed of iron core and winding coil. If the winding has resistance, power on will form loss. The loss is directly proportional to the square of resistance and current. This is copper meteorite. If the current is not standard DC or sine wave, it will also form harmonic loss; The iron core has hysteresis eddy current effect and will also form loss in alternating magnetic field. Its size is related to material, current, frequency and voltage, which is called iron loss.

銅損和鐵損都會以發熱的形式表現出來，從而影響電機的效率。步進電機通常追求定位精度和力矩輸出，效率比較低，電流通常比較大，且諧波成分高，電流交變的頻率也隨轉速而變化，因此步進電機普遍存在發熱狀況，且狀況比通常交流電機嚴重。

Copper loss and iron loss will be expressed in the form of heating, which will affect the efficiency of the motor. Stepper motors usually pursue positioning accuracy and torque output, with low efficiency, large current and high harmonic component, and the frequency of current alternating also changes with speed. Therefore, stepper motors generally have heating conditions, which are more serious than ordinary AC motors.

步進電機發熱的合理范圍電機發熱允許程度：

Reasonable range of stepper motor heating allowable degree of motor heating:

主要取決于電機內部結構絕緣等級。內部結構絕緣性能在高溫下(130度以上)才會被破壞。因此只要內部結構不超過130度，電機便不會毀壞，而這時外表溫度會在90度以下。因此，步進電機外表溫度在70-80度全部都是正常的。簡單的溫度測量方法有用點溫計的，也可以粗略判斷：拿手可以觸摸1-2秒以上，不超過60度；拿手只能碰一下，大約在70-80度；滴幾滴水迅速氣化，則90度以上了。

It mainly depends on the insulation grade of the internal structure of the motor. The insulation performance of the internal structure will be damaged only at high temperature (above 130 degrees). Therefore, as long as the internal structure does not exceed 130 degrees, the motor will not be damaged, and the external temperature will be below 90 degrees. Therefore, the stepper motor surface temperature is normal at 70-80 degrees. The simple temperature measurement method can be measured with a point thermometer, or it can be roughly judged: you can touch it for more than 1-2 seconds, no more than 60 degrees; You can only touch it, about 70-80 degrees; A few drops of water vaporize rapidly, and it is more than 90 degrees.