Hemera Nightmare Pl…
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Hemera Nightmare Please help!

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Hello all, I am relatively new to FDM printing. I’ve only had my Ender 3 v2 for about 9 months. I come from the Resin community so not much along the lines of tinkering and upgrading your printer as you do with FDM. Have to agree I like it more… Anyway let me get to my question.

I have been having a hell of a hard time with an E3D Hemera (/w V6 hotend) upgrade for my Ender 3 V2. I am completely lost. I tried to run through all the calibration steps on Teaching Tech and anything I print comes out crappy. As you can see in the picture the Temp tower sucks on all temps and the retention tower has no stringing on mostly all distances from 0.4mm to 1.4mm. I am also running customer Marlin Firmware from the Australian guy that does nightly runs. I used his customer firmware maker to have the Hemera hotend changes put in. I was using his firmware from the start as I liked the feature it came with and never had an issue with it.


I am looking for someone who can give me a hand in figuring out what I am doing wrong. I don’t want to have to go back to the default hotend. I paid too much money to scrap this Hemera. And E3D has given me no help at all.

I had perfect prints before switching to this. This is what I get for messing with perfection.


Creality Ender 3 V2
Mother Board: Creality v4.2.7
E3D Hemera Direct Drive kit with a V6 Hotend
Harden Steel Nozzle 0.4mm
ABL: BLTounch
Part Cooling: 100% fan from layer 2
Filament: Sunlu 1.75 PLA Also Running Octoprint

My Settings
Send: M503
Recv: echo: G21 ; Units in mm (mm)
Recv: echo:; Filament settings: Disabled
Recv: echo: M200 S0 D1.75
Recv: echo:; Steps per unit:
Recv: echo: M92 X80.00 Y80.00 Z400.00 E391.26
Recv: echo:; Maximum feedrates (units/s):
Recv: echo: M203 X500.00 Y500.00 Z10.00 E50.00
Recv: echo:; Maximum Acceleration (units/s2):
Recv: echo: M201 X500.00 Y500.00 Z100.00 E5000.00
Recv: echo:; Acceleration (units/s2): P<print\_accel> R<retract\_accel> T<travel\_accel>
Recv: echo: M204 P500.00 R1000.00 T500.00
Recv: echo:; Advanced: B<min\_segment\_time\_us> S<min\_feedrate> T<min\_travel\_feedrate> X<max\_x\_jerk> Y<max\_y\_jerk> Z<max\_z\_jerk> E<max\_e\_jerk>
Recv: echo: M205 B20000.00 S0.00 T0.00 X8.00 Y8.00 Z0.40 E5.00
Recv: echo:; Home offset:
Recv: echo: M206 X-17.00 Y-14.00 Z-0.60
Recv: echo:; Auto Bed Leveling:
Recv: echo: M420 S0 Z10.00
Recv: echo: G29 W I0 J0 Z0.15250
Recv: echo: G29 W I1 J0 Z0.08000
Recv: echo: G29 W I2 J0 Z0.08000
Recv: echo: G29 W I0 J1 Z0.10000
Recv: echo: G29 W I1 J1 Z0.02750
Recv: echo: G29 W I2 J1 Z0.02750
Recv: echo: G29 W I0 J2 Z0.11250
Recv: echo: G29 W I1 J2 Z0.02750
Recv: echo: G29 W I2 J2 Z0.03500
Recv: echo:; Material heatup parameters:
Recv: echo: M145 S0 H210 B60 F255
Recv: echo: M145 S1 H240 B70 F255
Recv: echo:; PID settings:
Recv: echo: M301 P21.00 I1.61 D68.58
Recv: echo: M304 P101.07 I17.04 D399.65
Recv: echo:; Power-Loss Recovery:
Recv: echo: M413 S0
Recv: echo:; Z-Probe Offset (mm):
Recv: echo: M851 X68.00 Y0.00 Z-1.50
Recv: ok P15 B3

E3D Custom Start GCODE(from their webpage)
; Ender 3 Custom Start G-code
M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration

M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate

M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration

M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk

M220 S100 ;Reset Feedrate

M221 S100 ;Reset Flowrate

G28 ;Home


G92 E0 ;Reset Extruder

G1 Z2.0 F3000 ;Move Z Axis up

G1 X1.1 Y20 Z0.28 F5000.0 ;Move to start position

G1 X1.1 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line

G1 X1.4 Y200.0 Z0.28 F5000.0 ;Move to side a little

G1 X1.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line

G92 E0 ;Reset Extruder

G1 Z2.0 F3000 ;Move Z Axis up

Cura Settings (Copy CHEP cura profile)
Layer Height 0.12
Line Width 0.4
Wall thickness 1.2
Wall line count 3
Infill 25%
Temp 200
Bed 60
Flow 100%
Print speed 50 mm/s
Wall Speed 25 mm/s
Travel Speed 150 mm/s
Print Acceleration Control 500mm/(s squared)
Retraction distance: 0.4 mm
Retraction speed: 40 mm/sec

Ender 3 v2 Hemera Mount 2 and optional bltouch adapter by elcommandante on Thingiverse:

Hemera V6/ Volcano Part Cooling Duct & Mount by Hangtight on Thingiverse:
Part cooling: Duct_V2


1 Answer

Such a thorny problem! I send your situation to the Creality team. Hope they can offer some useful information.