Ender 3 s1 klipper acceleration July 8, 2019 16 32 64 128 Ender 3 s1 max acceleration klipper Ender 3 s1 pro klipper max acceleration Klipper for ender 3 s1 Ender 3 s1 printing speed Ender 3 s1 retraction settings Ender 3 s1 pro clogged