Safety Caution
- Be aware of your electronics. Don't work on your printer while it is plugged in or turned on.
- Be aware when you heat up your new hotend not to burn yourself on the heater block nozzle or heater cartridge.
- The standard Hemera is capable of printing up to 300°C, do not exceed these temperatures unless you have replaced the relevant components. Please see Hemera Max Temperature Rating Guide for more information.
- The firmware modification is not optional it is a mandatory step, Please see Hemera Firmware Guides
- Make sure you have ordered and received the correct voltage heater and fan to match the power supply of your printer. All of our current heater cartridges should have the voltage and wattage laser engraved on the cartridge.
- Connecting 12v parts to a 24v power supply can result in overheating, component damage, or fire. If you are unsure double check the rating on your power supply.
- Your HotEnd and your printer are your responsibility. We cannot be held responsible for damages caused by the use, misuse or abuse of our products.
Kit Includes
Assembly
1. Screw the nozzle into the heater block, ensure this is done from the side with 3 holes otherwise the assembly will fail later on.
The above image shows the same step from different perspectives.
2. Screw the Hemera HeatBreak into the V6 HeaterBlock, aim to have the top of the HeatBreak thread flush with the top of the HeaterBlock.
Before moving onto the next step check that the nozzle and break are in the correct position as per the above images.
If the nozzle is fastened up against the HeaterBlock at this stage you will run a significant risk of not creating a seal during the hot tightening process which will lead to molten plastic leaking from the assembly.
3. Slide the thermistor into the HeaterBlock fastening it with an M3 grub screw.
Be careful not to over tighten as you will risk crushing the internal glass bead.
4. Slide in the HeaterCartridge and fasten with the M3 Dome head screw.
Deformation of the HeaterBlock is to be expected and ensures good surface area contact for efficient thermal transfer.
Before installing the heater cartridge it’s a good idea to double-check you are using the correct heater for the power supply you are using. The cartridge should be engraved with both the voltage and wattage, but it’s still worth double-checking with a multimeter:
- A 12V 30W heater cartridge will read between 4.2 - 5.7 Ω.
- A 12V 40W heater cartridge will read between 3.1 - 3.8 Ω.
- A 24V 30W heater cartridge will read between 16.7 - 22.6 Ω.
- A 24V 40W heater cartridge will read between 12.3 - 15.1 Ω.
If your heater cartridge is reading out of specification contact
support@e3d-online.com, do not attempt to heat up the heater cartridge if the reading is unexpected.
5. Apply thermal paste to the long section of the HeatBreak only.
Do not apply the paste to the hot (short) section of the HeatBreak.
If you have run out of thermal paste or are performing maintenance replacement paste can be purchased here. Alternatively, any CPU thermal paste can be used.
6. Screw the V6 HotSide into the Hemera Main assembly, there is no need to over-torque this. Finger tight is sufficient.
7. Screw the fan into the heatsink using x2 self-tapping screws.
8. Connect the extension wires to both the thermistor and fan, this provides additional length making it easier to connect to your mainboard, whilst providing a quick release for maintenance or replacements.
9. Insert the collet and PTFE tube into the top of the HeatSink. Unlike some of our other products a retaining clip is not required.
The length of PTFE tube is not important and is down to your personal preference, however, try to leave it long enough to be able to remove it for occasional maintenance.
10. Insert the step motor cable into the top of the stepper motor.
If you find the stepper motor is making a buzzing sound and not rotating properly the coil pairs are not matched up, the simplest fix for this is to switch the two middle wires around as shown in the second picture.
Hot Tightening
11. Hot tightening is the last mechanical step and is essential in order to seal the nozzle and heatbreak together ensuring molten plastic doesn't leak out of the HotEnd in use.
Using the printers control software or LCD set the temperature to 300°C and wait for roughly one minute for all the components to equalise in temperature.
Gently tighten the nozzle whilst holding the heater block still with a spanner to tighten the nozzle.
You want to aim for 2Nm of torque on the nozzle.
The Hemera Direct assembly is now complete before use please visit the firmware guides on how to set up your Printer board for use with Hemera.