BIQU H2 Extruder V2.0 / 3djake / review

Wiring / convention

• (Another) Biqu H2 direct drive extruder upgrade
• BIQU H2 V2 swap - everything else is stock - The H2 V2 has a full rectangular hot end, which means a bunch of thingiverse mounts were outdated
  • mount plate
  • Fan Duct
  • configuring steps from the new extruder - don’t change firmware for that. You use printer face or your octoprint to edit the EEPROM CONFIG code. => you need to connect to usb port and follow instruction
  • Did the biqu h2 upgrade - / cable chain
  • Stepper config: - Number of pulses: 932steps/mm for stepper motor drive at 16 subdivisions (micro-steps) (further correction is required)
    • Recommended motor current: 800mA
    • Extrusion capacity (based on existing): 600mm³/min(depending on filaments)

Klipper BIQU H2 v2 Config / config

[extruder]
max_extrude_only_distance: 1000.0
step_pin: PB4
dir_pin: !PB3
enable_pin: !PC3
microsteps: 16
rotation_distance: 3.4334
nozzle_diameter: 0.400
filament_diameter: 1.750
heater_pin: PA1
sensor_type: EPCOS 100K B57560G104F
sensor_pin: PC5
control: pid
pid_Kp: 16.948
pid_Ki: 0.706
pid_Kd: 101.690
min_temp: 0
max_temp: 260
pressure_advance: 0.05

Firmware retraction for BIQU H2

[firmware_retraction]
retract_length: 0.5
retract_speed: 4

To check BEFORE USE

[tmc2209 extruder]
#uart_pin: PC11 # not creality board
#tx_pin: PC10
#uart_address: 3
run_current: 0.750
hold_current: 0.500