You can get yourself a Hemera XS Motor here.
This guide covers everything you need to know about upgrading your Hemera to Hemera XS.
Before upgrading, please read the following safety cautions.
You will need:
- 2.5mm hex key
- Phillips head screwdriver
- Hemera XS Motor
Make sure you have removed the filament from the printer and that it is unplugged from the power source.
As the mounting points for Hemera are on the Motor. By upgrading to Hemera XS, the mounting hole pattern has now changed and as a result, you will most likely need a new mounting solution.
Make sure to print this BEFORE taking apart your machine!
1. Carefully detach the motor cable. You should be able to leave your HotEnd wiring connected.
2. Remove your existing Hemera from its mount and take off any part cooling fan shrouds/probe holders etc.
The square nuts may fall out of the mounting slots when loose so watch out for those.
3. Unscrew the heatsink fan
Keep the fan and the screws on hand, you will be reusing them.
4. Remove the two M3 x 20 screws that hold the heatsink.
5. Release the tension on the idler, this will make it easier to remove the heatsink.
6. Remove the heatsink. If you are struggling to get it loose, pressing on the idler as you remove it can be helpful. Then set the Motor aside.
The square nuts may fall out when removing the motor.
7. If your bearing has been left behind in the old motor, remove it and place it on the gear shaft. Then attach the new motor to the sink, releasing the tension from the idler arm as you do. Also, remember to add square nuts if you are using them.
Pay close attention to the orientation of the sink. The bearing on the motor face and the axel of the drive gear must line up.
8. Use the two M3 x 20 screws to secure the new heatsink
9. Use the remaining two self-tapping screws to attach the fan to the heatsink. The side of the fan that has the label should be facing the heatsink.
You can rotate the orientation of the fan to position the fan wires in the most convenient location for your wiring.
Mounting Hemera XS:
As the mounting points for Hemera are on the Motor. By upgrading to Hemera XS, the mounting hole pattern has now changed and as a result, you will most likely need a new mounting solution
You can modify your old mount by adding new holes where necessary and then re-print it. This will keep the nozzle in the same position which means you won't need to touch your firmware or your endstops. You can find Reference CAD for Hemera XS and a datasheet with hole spacing dimensions here.
If you choose to download a mount or create a new mount from scratch, be aware that the nozzle position may have changed. As a result, you may have to make changes to your endstops or firmware to maintain full build volume.
10. Mount Hemera XS back onto the printer.
Take care to use the correct length of mounting screws. If they are too long, you risk cracking the square nut housing. If in doubt, you should refer to our Bracket Design Guide.
11. Plug the Motor cable into the new Motor.
A note on Idler tension:
Remember to adjust the idler tension so that the white spring block is flush with the front face of the idler.