disable_arc_fitting on K1 machines#579
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Description
The K1 Series, whether it's K1, K1C, K1 Max, or whatever K1 models are out there, have a very weak MCU that often triggers MQO or TTC errors related to long or complex move queues, which literally shut down the MCU or even crash it with no proper HW debug options, due to the K1 potato board not having a JTAG port. Gigatons of Filament were wasted worldwide.
All the K1* process profiles have "enable_arc_fitting" enabled by default. This setting very often is disabled by users., as there is no real benefit in Klipper versus Marlin.
By disabling them by default, we get more reliable prints, especially if the gcode is very complex, thus saving MCU resources.