The Motor pin details are shown on the right hand side of the photo. Laser_module_pwm_pin is set to 2.5 denoting that this pin will be used to control the laser power.

In the Config.txt file attached, The laser module configuration starts at line 98. Note only the -ve pin needs to be connected and it goes to the L on the power supply. On the left of the drawing is pin 2.5, this is the -ve pin labelled to control the bed heater. It is important to make a note of the connecting pins that you are going to use. Motherboard interface is compatible with existing machines.The attached Pinout is specifically for the BigTreeTech SKR V1.3 board. The improvement that can be brought to the current machine is the increase in motion speed. The chip performance is 50% stronger than stm32.

Later we will upgrade this chip on all master machines.

So, don’t worry about your atmel performance is not strong enough. The performance of atmel is completely sufficient! , 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 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?Ĭompared with atmel, the actual increase in cutting speed and engraving speed is not obvious. Regarding the 32-bit stm32 and atmel chips, atmel is the original grbl dedicated chip. They acknowledge the speed advantages of the 32-bit platforms:Ībout STM32 and atmel chips？ (2020.10.31) Take a look at this excerpt from the NEJE wiki. I’ve seen a number of discussions on speed considerations for this. But for things like engraving and traversal moves this could very much be a limiting factor. This probably won’t be a limiting factor for most diode cutting operations. This is especially true for more computationally intensive operations like arc moves. You may be speaking theoretically but the limits of the 8-bit arduino platform has run its course in the 3D printing world and in the laser world as well largely because of performance considerations.

K40 lightburn board