SK-Tank CF BMG Dual 5015s Mount

Description

This is a replacement SecKit SK-Tank mount for a BMG and CF gantry, with dual 5015 radial/blower fans for part cooling, and a ducted axial 30mm (3010, 3015, or 3020) fan for hotend cooling. In future, I plan to rework the fan ducts, and also add support for E3D V6 and Volcano, and BLTouch. I also plan to make a version for the stock aluminum gantry... the hole pattern is a bit different so this one only works on the CF gantry. Assembly instructions: * Print the parts. The default orientation should be OK, but adjust as needed. * Tap the hotend fan holes in the back of the extruder plate for M3, or your preference. The holes as designed are intentionally a bit small for M3, so they tap easily. If you don't plan to tap them you may want to drill them with a 3mm bit to accept an M3 screw. * Install the hotend fan. * Install the inductive probe (height is not important yet, just put it about halfway) into the L-shaped inductive probe mount. * Install the inductive probe mount to the extruder plate using two short M3 screws. * Remove the 4020 duct, BMG and hotend, if installed. * Sandwich the extruder plate between the extruder stepper and the BMG, and start the three long M3 screws. Do not tighten fully just yet. * Rotate the hotend so that the heat block points towards the front. This is to prevent radiant heat from deforming the hotend fan duct. * If necessary, reverse the heater and thermistor so that the wires will exit to the left. * Tighten the three long M3 screws to firmly attach the BMG to the stepper motor and lock the hotend in place. * Pass the heater and thermistor wires through the rounded pass-through hole in the extruder plate. * Trim and/or file the inside of the fan duct attachment sockets, so that they are smooth and free of obstructions. * Trim and/or file the fan ducts the same way. You may want to test fit them during the process to ensure they will go all the way in and fit snugly. * Install the extruder assembly to the four existing M3 standoffs. * On each of the 5015 fans: * File down the top screw channel so there is room to accommodate a nut between the screw channel and the body of the BMG. The side that needs to be filed is different per fan; file one side on one fan, and the other side on the other fan. * File down the little nub at the bottom of the +Y side of the fan, to allow it to seat fully. * Test fit the 5015 fans. Make any necessary adjustments, then install the fans, placing a nut toward the inside, between the fan and the BMG. Run the wire for the left fan through the same opening as the other wires. Run the right one around the right side of the fan, then up along the stepper motor inside the standoffs. * Insert the fan ducts until snug. * Connect the wiring. * Adjust the firmware configuration to reflect the new probe X and Y offsets. With the inductive probe the offsets are -22.2 mm for X, and +32.3 mm for Y. Accordingly you should also adjust your bed mesh and z tilt coordinates. I have pasted my current Klipper config below for reference. * Calibrate the probe Z offset. * Adjust fan speeds in your slicer. * You're done! My Klipper config: # This file contains common pin mappings for the 6 stepper motor # "FLYmaker Fly-CDYv2" board from creative3dprinter.com. To # use this config, the firmware should be compiled for the STM32F407 # with a "32KiB bootloader". # see hardware details on https://github.com/FLYmaker/Fly-CDYv2 # The "make flash" command does not work on the Fly-CDYv2. Instead, # after running "make", copy the generated "out/klipper.bin" file to a # file named "firmware.bin" on an SD card and then restart the Fly-CDYv2 # with that SD card. # See docs/Config_Reference.md for a description of parameters. # This file can be used as a basline printer.cfg for the SK-Tank ################################################################################################################################################################ # ATTENTION # You shall not use this file without checking and adopting the settings according to your actual built! (e.g. wiring, dimensions, extruder setup) # ################################################################################################################################################################ # Note: please check https://www.klipper3d.org/Config_Reference.html to get the full list of settings. Default settings and not set explicit in this cfg ######################################## # basic settings ######################################## [mcu] serial: /dev/serial/by-id/usb-Klipper_stm32f407xx_220040001651383230343230-if00 [printer] kinematics: corexy max_velocity: 300 max_accel: 5000 ;set to 7000 for resonance test max_z_velocity: 7 max_z_accel: 100 # Note: Extruder settings have to be set in on the extruder in the Steppers & Stepper # Drivers section usig "max_extrude_only_velocity:" and "max_extrude_only_accel:" attributes ######################################## # Steppers & Stepper Drivers ######################################## # using TMC2208 configuration for TMC2225 steper drivers # lower belt stepper left back # usind X socket on Fly-CDYv2 [stepper_x] step_pin: PE5 dir_pin: !PC0 # for standard SK-Tank wiring you have to change the direction by adding "!" so the new pin will be "!PC0" enable_pin: !PC1 microsteps: 16 rotation_distance: 32 # Marlin/RRF reference: 200 steps / mm (rotation_distance = <full_steps_per_rotation> * <microsteps> / <steps_per_mm>) full_steps_per_rotation: 400 # for a 0.9 stepper endstop_pin: PC7 position_endstop: 0 position_min: -1 position_max: 350 homing_speed: 150 [tmc2208 stepper_x] uart_pin: PC15 interpolate: True run_current: 0.800 hold_current: 0.500 # upper belt stepper right back # usind Y socket on Fly-CDYv2 [stepper_y] step_pin: PE4 dir_pin: !PC13 # for standard SK-Tank wiring you have to change the direction by adding "!" so the new pin will be "!PC13" enable_pin: !PC14 microsteps: 16 rotation_distance: 32 # Marlin/RRF reference: 200 steps / mm (rotation_distance = <full_steps_per_rotation> * <microsteps> / <steps_per_mm>) full_steps_per_rotation: 400 # for a 0.9 stepper endstop_pin: PD11 position_endstop: -3 position_min: -4 position_max: 324 homing_speed: 150 [tmc2208 stepper_y] uart_pin: PA8 interpolate: True run_current: 0.800 hold_current: 0.500 # Z stepper front left # usind ZA socket on Fly-CDYv2 - ZB socket need to be jumpered when not used (connect 2B<>2A and 1A<>1B pin in socket) [stepper_z] step_pin: PE3 dir_pin: PB7 enable_pin: !PB8 microsteps: 16 rotation_distance: 32 # Marlin/RRF reference: 2000 steps / mm (rotation_distance = <full_steps_per_rotation> * <microsteps> / <steps_per_mm> * <gear_ratio>) full_steps_per_rotation: 200 # for a 1.8 stepper gear_ratio: 20:1 # to match z stepper 20:1 gearbox NEMA8 #endstop_pin: PB10 # use optical endstop for Z endstop endstop_pin: probe:z_virtual_endstop # use BL-Touch or inductive probe for Z endstop #position_endstop: 2.5 # disable when using BL-Touch or inductive probe for Z endstop position_min: -3 position_max: 400 homing_retract_dist: 2 # added to lift the nozzle 2mm after homing vs. endstop [tmc2208 stepper_z] uart_pin: PB6 interpolate: True run_current: 0.500 hold_current: 0.400 # Z1 stepper front right # usind E1 socket on Fly-CDYv2 [stepper_z1] step_pin: PE1 dir_pin: !PD3 # direction inverted since SK-Tank setup is using flipped stepper orientation for Z1 enable_pin: !PD4 microsteps: 16 rotation_distance: 32 # Marlin/RRF reference: 2000 steps / mm (rotation_distance = <full_steps_per_rotation> * <microsteps> / <steps_per_mm> * <gear_ratio>) full_steps_per_rotation: 200 # for a 1.8 stepper gear_ratio: 20:1 # to match z stepper 20:1 gearbox NEMA8 [tmc2208 stepper_z1] uart_pin: PD1 interpolate: True run_current: 0.500 hold_current: 0.400 # Z2 stepper back center # usind E2 socket on Fly-CDYv2 [stepper_z2] step_pin: PE0 dir_pin: PA15 enable_pin: !PD0 microsteps: 16 rotation_distance: 32 # Marlin/RRF reference: 2000 steps / mm (rotation_distance = <full_steps_per_rotation> * <microsteps> / <steps_per_mm> * <gear_ratio>) full_steps_per_rotation: 200 # for a 1.8 stepper gear_ratio: 20:1 # to match z stepper 20:1 gearbox NEMA8 [tmc2208 stepper_z2] uart_pin: PE9 interpolate: True run_current: 0.500 hold_current: 0.400 # extruder stepper # usind E0 socket on Fly-CDYv2 [extruder] step_pin: PE2 dir_pin: !PD6 enable_pin: !PD7 microsteps: 16 # values set for Biqu H2 #rotation_distance: 3.45 # Biqu H2. Marlin/RRF reference: 1900 steps / mm (rotation_distance = <full_steps_per_rotation> * <microsteps> / <steps_per_mm> * <gear_ratio>) # values set for Flex3Drive G5 Flex Extruder rotation_distance: 7.71 # Triangle Lab BMG clone full_steps_per_rotation: 200 # for a 1.8 stepper #gear_ratio: 19:16 # values set for Flex3Drive G5 Flex Extruder nozzle_diameter: 0.400 filament_diameter: 1.750 #max_extrude_only_velocity: 40 # values set for Flex3Drive G5 Flex Extruder max_extrude_only_distance: 100.0 #max_extrude_only_accel: 60 # values set for Flex3Drive G5 Flex Extruder #pressure_advance: 0.05 heater_pin: PD12 # T0 sensor_pin: PA3 # T0 Temp # Thermistor - Biqu H2 #sensor_type: NTC 100K beta 3950 #control: pid #pid_Kp: 13.385 # to be adjusted by running PID_CALIBRATE HEATER=extruder TARGET=205 #pid_Ki: 0.386 # to be adjusted by running PID_CALIBRATE HEATER=extruder TARGET=205 #pid_Kd: 115.950 # to be adjusted by running PID_CALIBRATE HEATER=extruder TARGET=205 #Thermistor - Triangle Lab Dragon HF sensor_type: NTC 100K beta 3950 # basic Thermistor, type to be verified by Ernest control: pid # changed to "watermark" and comment/delet the PID seetings below if you have issues with the SSR (like some SSR dont like PID control) pid_Kp: 23.242 # to be adjusted by running PID_CALIBRATE HEATER=extruder TARGET=220 pid_Ki: 1.476 # to be adjusted by running PID_CALIBRATE HEATER=extruder TARGET=220 pid_Kd: 91.516 # to be adjusted by running PID_CALIBRATE HEATER=extruder TARGET=220 min_extrude_temp: 170 min_temp: 0 max_temp: 260 [tmc2208 extruder] uart_pin: PD5 interpolate: True run_current: 0.800 hold_current: 0.300 ######################################## # BED HEATERS & FANS ######################################## [heater_bed] heater_pin: PB0 # BED sensor_pin: PB1 # B-TEMP sensor_type: NTC 100K beta 3950 # basic Thermistor, type to be verified by Ernest control: pid # changed to "watermark" and comment/delet the PID seetings below if you have issues with the SSR (like some SSR dont like PID control) pid_Kp: 53.190 # to be adjusted by running PID_CALIBRATE HEATER=heater_bed TARGET=60 pid_Ki: 2.955 # to be adjusted by running PID_CALIBRATE HEATER=heater_bed TARGET=60 pid_Kd: 239.354 # to be adjusted by running PID_CALIBRATE HEATER=heater_bed TARGET=60 min_temp: 0 max_temp: 100 [fan] pin: PA0 # FAN0 used as print cooling fan [heater_fan FAN1] pin: PA2 # FAN1 used as hotend cooling fan heater: extruder heater_temp: 50.0 #[controller_fan FAN2] # this will allow you to connect to driver cooling fan to FAN2 instead of VCC (permanent power) so its only cooling if the stepper drivers are active #pin: PA2 # FAN2 used as controller cooling fan ######################################## # Inductive sensor ######################################## [probe] pin: PB10 #x_offset: -22.0 # BMG/Dragon stock #y_offset: 16.0 # BMG/Dragon stock x_offset: -22.2 # BMG/Dragon dual 5015s y_offset: 32.3 # BMG/Dragon dual 5015s #x_offset: -27.4 # BMG/Dragon Berd-Air #y_offset: 14.9 # BMG/Dragon Berd-Air z_offset: 1.05 speed: 7.5 # Speed (in mm/s) of the Z axis when probing. The default is 5mm/s. samples: 1 ######################################## # BL-Touch ######################################## #[bltouch] #sensor_pin: ^PC2 #control_pin: PE6 #pin_move_time: 0.4 #stow_on_each_sample: True #probe_with_touch_mode: True #Needed for BLTouch V3.0 / V3.1 #x_offset: -26.0 #y_offset: 0.0 #z_offset: 2.65 #speed: 5 #samples: 2 #sample_retract_dist: 2 #samples_result: average [safe_z_home] home_xy_position: 175,175 # Change coordinates to the center of your print bed speed: 150 z_hop: 10 # Move up 10mm z_hop_speed: 7.5 [bed_mesh] speed: 150 horizontal_move_z: 3 mesh_min: 35,51 #Probe coordinates mesh_max: 310,341 #Probe coordinates probe_count: 7,7 algorithm: bicubic bicubic_tension: 0.2 move_check_distance: 5 split_delta_z: .025 fade_start: 1 fade_end: 10 #fade_target: 0 [z_tilt] #Positions of the bed mounts, in nozzle coordinates. Shouldn't need to change these once set up. z_positions: 6, 6 344, 6 175, 325 #Positions to measure, in nozzle coordinates - i.e. make sure the probe is above the bed when the nozzle is at these positions points: 31, 0 350, 0 203, 278 speed: 100 horizontal_move_z: 10 retries: 2 retry_tolerance: 0.1 [force_move] enable_force_move: True # Set to true to enable FORCE_MOVE and SET_KINEMATIC_POSITION ######################################## # Input Shaping ######################################## [mcu rpi] serial: /tmp/klipper_host_mcu [adxl345] cs_pin: rpi:None [resonance_tester] accel_chip: adxl345 probe_points: 175,175,20 # an example [input_shaper] # Biqu H2 #shaper_freq_x: 74.0 #shaper_type_x: mzv #shaper_freq_y: 82.4 #shaper_type_y: 2hump_ei # BMG/Dragon HF - Aluminum gantry #shaper_freq_x: 61.6 #shaper_type_x: mzv #shaper_freq_y: 46.4 #shaper_type_y: mzv # BMG/Dragon HF - CF gantry - NOTE NEEDS UPDATING shaper_freq_x: 60.0 shaper_type_x: zv shaper_freq_y: 52.0 shaper_type_y: zv ######################################## # Filament Switch Sensor ######################################## [filament_switch_sensor my_sensor] pause_on_runout: True switch_pin: ^!PB11 # Z-Max pin ######################################## # MACROS ######################################## [gcode_macro PAUSE] rename_existing: BASE_PAUSE default_parameter_X: 10 #edit to your park position default_parameter_Y: 10 #edit to your park position default_parameter_Z: 10 #edit to your park position default_parameter_E: 1 #edit to your retract length gcode: SAVE_GCODE_STATE NAME=PAUSE_state BASE_PAUSE G91 G1 E-{E} F2100 G1 Z{Z} G90 G1 X{X} Y{Y} F6000 [gcode_macro RESUME] rename_existing: BASE_RESUME default_parameter_E: 1 #edit to your retract length gcode: G91 G1 E{E} F2100 G90 RESTORE_GCODE_STATE NAME=PAUSE_state MOVE=1 BASE_RESUME [gcode_macro CANCEL_PRINT] rename_existing: BASE_CANCEL_PRINT gcode: TURN_OFF_HEATERS CLEAR_PAUSE SDCARD_RESET_FILE BASE_CANCEL_PRINT [gcode_macro G29] gcode: BED_MESH_CALIBRATE ###################################################################### # Start Print and End Print ###################################################################### # Replace the slicer's custom start and end g-code scripts with # START_PRINT and END_PRINT. [gcode_macro START_PRINT] default_parameter_BED_TEMP: 60 default_parameter_EXTRUDER_TEMP: 210 gcode: {% set BED_TEMP = params.BED_TEMP|default(60)|float %} {% set EXTRUDER_TEMP = params.EXTRUDER_TEMP|default(190)|float %} # Start bed heating M140 S{BED_TEMP} # Start bed extruder M104 S{EXTRUDER_TEMP} # Use absolute coordinates G90 # Reset the G-Code Z offset (adjust Z offset if needed) SET_GCODE_OFFSET Z=0.0 # Home the printer G28 # Adjust Z tilt for 2 Z axis Z_TILT_ADJUST # # Move the nozzle near the bed # G1 Z5 F3000 # # Move the nozzle very close to the bed # G1 Z0.2 F300 # Wait for bed to reach temperature M190 S{BED_TEMP} # Set and wait for nozzle to reach temperature M109 S{EXTRUDER_TEMP} # Move to the middle of the bed G1 X175 Y175 Z5 F3000 [gcode_macro END_PRINT] gcode: # Turn off bed, extruder, and fan M140 S0 M104 S0 M106 S0 # Move nozzle away from print while retracting G91 G1 X-2 Y-2 Z2 E-3 F300 # Raise nozzle by 10mm G1 Z10 F3000 # move nozzle to the middle back G90 G1 X175 Y340 F3000

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