The mainboard of the two-axis laser engraving machine simplifies some interfaces that are not used by the laser engraving machine, retains the serial communication and leads to four terminals from left to right, which are laser power supply (for access voltage) and PWM output (for controlling laser power). , Y limit and , it is convenient to modify the subdivision driver. It is recommended to use TMC2208, low noise and high precision.
Using open source firmware GRBL GRBL firmware V1.1 link: https://github.com/gnea/grbl/releases
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