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 =====NEJE Laser Engraving and Cutting Machine WIKI=====
 [[http://wiki.nejetool.com/doku.php?id=nejelaser_kz|{{https://nejetool.oss-us-west-1.aliyuncs.com/wiki/home/330kz.png?200x200}}]]
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+**About STM32 and atmel chips？ ** //(2020.10.31)//
+Regarding the 32-bit stm32 and atmel chips, atmel is the original grbl dedicated chip. The stm32 chip can increase the main frequency and can indeed increase the movement speed of the machine, but there is no increase in cutting speed and engraving speed! why?
+Compared with atmel, the actual increase in cutting speed and engraving speed is not obvious. , Because the cutting speed is determined by the laser power, the engraving speed is determined by the weight of the module and the sliding module. The performance of atmel is completely sufficient!
+So, don’t worry about your atmel performance is not strong enough.
+Later we will upgrade this chip on all master machines. The chip performance is 30% stronger than stm32. The improvement that can be brought to the current machine is the increase in motion speed.
+**20W laser fan stop working？ ** //(2020.9.2)//
+Note: For the New NEJE 20W laser module, the working status of the fan is determined by the temperature of the module, and the fan speed is dynamically adjusted according to temperature changes. When the machine stops working, the fan will stop working when the laser temperature drops.

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