BIGTREETECH Octopus Pro Controller Board F446 For those looking to push the limits, the new Octopus Pro High Voltage Motherboards will power up to 8 drivers at voltages up to 60V. Onboard Max31846 will support 2 & 4 wire PT100/Pt1000 thermistors for those looking to go beyond 300c print temps. Built for Klipper & Marlin 2.0 446 Specific specs: The main control frequency of F446 is 180MHz The external crystal oscillator of F446 is 12MHz F446 flash memory is 512K, Features 【Main Control Chip】The main control adopts the 32-bit ARM Cortex-M4 series STM32F446ZET6 chip with a frequency of up to 180 MHz. The external crystal oscillator is 12MHz. 【About Using Firmware】Support the use of Marlin2.0, killper, RRF three types of firmware. Please note: STM32F446ZET6 MCU flash memory space is 512k, so only some functions can be used when using RRF firmware. 【Stepper Motor】The Octopus Pro 3D printing motherboard can support up to 8 stepper motor drivers, and the motor drive power supply supports up to 60V input (only motor drive power supply). 【Support Proximity Sensor】Support proximity sensor, jumper optional pull-up resistor, support more models. This function can be sensed without touching the hot bed, while BLTouch needs touch sensing. 【High Temperature Test】The onboard MAX31865 can support 2/4-wire PT100/PT1000 temperature measurement without welding (the soldering resistance can also support 3-wire PT100/PT1000 temperature measurement) **While the manufacturer states these are 60v capable, we recommend extreme caution on anything above 48v. use at your own risk**
