RemRam
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Release status: working
Description | RemRam 32bit Board
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Contents
RemRam 32bit Board für Marlin V2.0
Features
- 32bit STM32F765VI
216 MHz 512 KBytes RAM 2 MBytes flash
- 4x TMC2130 stepper driver
stealthChop spreadCycle coolStep stallGuard
- 24V main power rail
heatbed output (15A) heater output (5A) stepper driver and logic (5A)
- 5V secondary power rail (3A)
FAN1 and FAN2
- 2x 3.3V tertiary power rail (2x 0.5A)
MCU power (IO) SD card power
- Robust connectors
- Quality, high powered MOSFET
- 4 layer board with single side component placement
PCB design
Software used KiCad 5.0
Alternative Parts
You can substitute the TPS5408 with a TPS5402. In this case you also need to replace R4 with a Zero Ohm resistor.
Compiling the firmware
- Install Arduino
- Install the STM32 Core
- Optional: Update the STM32 Core using the git repository
- Download the current git branch of Marlin 2.0
- Open the Marlin project, select the "RemRam V1" board from the Marlin menue, edit the Marlin configuration file and build the project. You need to find the HEX or BIN file that Arduino creates and flash the firmware onto the board (See: "How to flash the firmware").
Configure Marlin
Following change is needed, until a bug is fixed:
Marlin/src/HAL/HAL_STM32/HAL_timers_STM32.h:
#elif defined STM32F7xx
#define HAL_TIMER_RATE (F_CPU/2) // frequency of timer peripherals
#ifndef STEP_TIMER
#define STEP_TIMER 2 // <- Was originally "5"
#endif
#ifndef TEMP_TIMER
#define TEMP_TIMER 7
#endif
#endif
These are the board specific Configuration.h changes:
#define SERIAL_PORT 1 // 1 = UART connection on EXT3 // -1 = Serial over USB (see: Virtual COM Port Support (Serial over USB)) // You can also configure SERIAL_PORT_2 #define BAUDRATE 115200 #define MOTHERBOARD BOARD_REMRAM_V1 #define X_DRIVER_TYPE TMC2130 #define Y_DRIVER_TYPE TMC2130 #define Z_DRIVER_TYPE TMC2130 #define E0_DRIVER_TYPE TMC2130 #define ENDSTOP_INTERRUPTS_FEATURE #define SDSUPPORT
These are the board specific Configuration_adv.h changes:
#define MINIMUM_STEPPER_DIR_DELAY 20 #define MINIMUM_STEPPER_PULSE 0 #define MAXIMUM_STEPPER_RATE 400000 #if HAS_TRINAMIC // You can change ever value EXCEPT R_SENSE based on your setup. // Example values of my HEVO setup #define R_SENSE 0.12 // DO NOT CHANGE! Need to be 0.12 for RemRam V1 #define HOLD_MULTIPLIER 0.3 // Scales down the holding current from run current #define INTERPOLATE true // Interpolate X/Y/Z_MICROSTEPS to 256 #define X_CURRENT 750 // rms current in mA. Multiply by 1.41 for peak current. #define X_MICROSTEPS 256 // 0..256 #define Y_CURRENT 750 #define Y_MICROSTEPS 256 #define Z_CURRENT 750 #define Z_MICROSTEPS 256 #define E0_CURRENT 400 #define E0_MICROSTEPS 256 #define STEALTHCHOP #define MONITOR_DRIVER_STATUS #if ENABLED(MONITOR_DRIVER_STATUS) #define CURRENT_STEP_DOWN 50 // [mA] #define REPORT_CURRENT_CHANGE #define STOP_ON_ERROR #endif #define SENSORLESS_HOMING // If you want to use sensorless homing #if ENABLED(SENSORLESS_HOMING) || ENABLED(SENSORLESS_PROBING) #define X_STALL_SENSITIVITY 2 #define Y_STALL_SENSITIVITY 2 #define Z_STALL_SENSITIVITY 2 #endif #define TMC_DEBUG // Helpfull when setting up your system #endif
src/pins/pins_REMRAM_V1.h
// Use only one or the other #define SDSS 57 // Onboard SD card reader //#define SDSS 9 // LCD SD card reader
Of course you need to aditionally change the configuration files based on your particular printer setup.