I have installed the Hemera on my Ender 5 Pro. Physical install and wiring went fine. Wiring: The stock creality E Stepper (see image below) and the Hemera stepper have pins 3 & 4 swapped so I updated this in my wiring loom and verified with a continuity tester. Hemera stepper datasheet (see page 6). https://e3d-online.dozuki.com/Document/UBaWiCkBAAlCkZBG/Hemera-Datasheet-(Edition-1).pdf Firmware: Flashed TH3D firmware U1.R2.A2 set the following switches in addition to the standard stuff: // If you have a direct drive machine with a filament sensor uncomment DIRECT_DRIVE_PRINTER to decrease the unload length from 100mm to 20mm #define DIRECT_DRIVE_PRINTER // If you want to change the Esteps for your printer you can uncomment the below line and set CUSTOM_ESTEPS_VALUE to what you want - USE WHOLE NUMBERS ONLY // This option sets the esteps from the CUSTOM_ESTEPS_VALUE line below. // If you need to reverse the e motor direction also enabled the REVERSE_E_MOTOR_DIRECTION option. // Example EStep Values: TH3D Aluminum Extruder - 95 ESteps, TH3D Tough Extruder - 463 ESteps, BMG Extruder - 415 ESteps // When installing a Tough Extruder or E3D Titan or Bondtech that is Geared you likely need to enable the REVERSE_E_MOTOR_DIRECTION option #define CUSTOM_ESTEPS_VALUE 400 #define CUSTOM_ESTEPS #define REVERSE_E_MOTOR_DIRECTION (I tried this both ways with no visible changes) // If you are using an E3D V6 Hotend (or Hemera) with their cartridge thermistor (not glass version) uncomment the below line. #define V6_HOTEND Vref: I couldn't figure out what Vref to use, found this post on youtube (Ryan Unruh) in the comments vref calculation for 2208s 1.3A stepper motor on the hemera 1.3/1.41 = .942 (root mean square) (.943 * 2.5) / 1.77 = 1.33 (max vref) 1.33 * .9 = 1.19 (final vref with safety margin) I used a ceramic screwdriver and a meter to adjust my vref on the v1.1.5 board to 1.19v as indicated. Issues: When I start up the printer, get the hot end up to temp, the hemera makes a grinding noise when it attempts to extrude. It doesn't seem to be powerful enough to pull in the filament as I try to load it. I am not sure it is turning in the right direction. Obviously something is wrong. Things to check would be greatly appreciated.
Hi Mitch, it sounds like you have the motor wired incorrectly, try switching the middle two wires on the board connection side of the motor cable. https://e3d-online.dozuki.com/Guide/Motor+cable+wiring/145?lang=en