What are the specifications of the dual voltage controller of the Ender 3/CR-10?
Following on from What level of voltage does the Creality Ender-3 run at?
Dave's answer states that both 12 V and 24 V can be used on the controller board. It also goes on to say that the controller board is used in both configurations in two different printers:
- Ender 3 and;
- CR-10
I would like to know how this dual voltage operation works:
- Does it use both voltages at the same time, or either one or the other?
- Are there two different electrical inlets or are they the same?
- Does it auto-detect or are there jumpers used to configure or are the components tolerant to both voltage levels?
Also related:
- What is the board used?
- Is the board a proprietary design or a standard third party board?
- Does anyone have any photos of the board and/or schematics?
I own the Ender 3, and it runs on 24V, as this photo of the power supply shows:
From power supply to the board, it uses a 2-wire line connected with a XT60 plug/jack that is common on RC cars:
The board itself is a proprietary design and labeled as "V1.1.2". The Voltage in is the lowest input on the left:
The Cooling fan (blue-yellow wire), the hotend cooling fan, heater cartridge (white shielded), bed heater (left black-red), board cooling fan (middle red-black) run (in this setup) on 24V. The Logic connectors (black-black & White-white) run 5V logic. I could not figure out the voltage of the stepper motors (upper row).
I have not figured out how the power management circut works, but it achieves this:
- Supply voltage $ U_S = 12V \lor 24V $
- Logic Voltage $ U_L = 5V $
- Sensor Voltage $ U_{sens} = U_L$
- Hotend Cooling Fan $ U_{cool} = U_S$
- Hotend Heating Cartridge $ U_{hot} = U_S $
- Heatbed $ U_{bed} = U_S $
The chip's caption can't be read on the photo, but it is labeled as "Δ ATMEL // ATMEGA1284P // AU 1726"
For the pinout, a german maker did determine, that it the configuration of a Sanguino equipped with an Atmega1284P 16Bit works for compiling firmware and flashing via a bootloader.
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Content dated before 7/24/2021 11:53 AM
