Electronics and features
On the bottom of the printer, besides the rubber feet, there are also some ventilation grills, behind which the electronics are hidden.
A handful of loosened screws later, the power supply, mainboard and various cables are exposed. An i3 design made of aluminum profiles is once again hidden under the plastic casing.
The mainboard is a Creality CR4NS200141C13 on a 24 Volt base with fixed stepper drivers.
In terms of firmware, the good old Marlin is used, but via the separately offered Sonic Pad from Creality, Klipper would also be possible. A STM32F401 microcontroller controls the printer.
Those who like to print down to the last bit of filament or unintentionally didn’t keep track of how much was left on the roll should be pleased with the well-functioning filament sensor. In my tests, this always reliably stopped printing before no more filament arrived at the bottom of the hotend.
The Ender-3 S1 Pro is also equipped with Powerloss Protection, which temporarily saves the print progress and resumes it after a power failure. In my opinion, however, only really useful for short failures, because the cooling of the print bed usually detaches the object. And then you have to start all over again anyway.
I actually found the least “smart” feature the best: The integrated LED lighting for the print bed, which can be switched on with a simple toggle switch on the side. Very handy to quickly check on the progress or to enable a webcam to get a better picture, for example.
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