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Introduction

Hemera is provided either fully or partially assembled, this guide has been written in the event of requiring reassembly post-maintenance

  1. Gather:
    • Gather:

    • x1 Hemera idler main body

    • x1 Hemera slid block (black)

    • x1 Hemera spring block (white)

    • x1 Hemera Thumbwheel

    • x1 M3 Square nut

  2. Insert the square nut into the slide block. Insert the square nut into the slide block.
    • Insert the square nut into the slide block.

  3. Place the sliding block with the square nut into the idler lever. Check orientation of the inserted slide block before proceeding.
    • Place the sliding block with the square nut into the idler lever.

    • Check orientation of the inserted slide block before proceeding.

    • It is easier to do this part with the Idler held "vertically" so that the square nut doesn't fall out in the act.

  4. Place the spring block into the idler arm. Check orientation before proceeding.
    • Place the spring block into the idler arm.

    • Check orientation before proceeding.

    • The spring block will fit nicely against the slide block when done right.

  5. Gather the thumbscrew
    • Gather the thumbscrew

    • Gather idler assembly

  6. Insert the thumbscrew into the idler assembly.
    • Insert the thumbscrew into the idler assembly.

    • Only turn it once or twice when the threads catch. Having low tension will maker later assembly easier.

  7. Gather:
    • Gather:

    • Idler hobb assembly

    • Idler shaft

  8. Place the idler shaft into the idler hobb assembly.
    • Place the idler shaft into the idler hobb assembly.

    • This will be a loose fit so be careful when you pick it up again.

  9. Place the idler hobb assembly on the idler arm. Check orientation before proceeding. Make sure to fully press the idler hobb assembly  into the idler arm before proceeding.
    • Place the idler hobb assembly on the idler arm.

    • Check orientation before proceeding.

    • Make sure to fully press the idler hobb assembly into the idler arm before proceeding.

    • It should click into place.

  10. Place the dowel into the heatsink Place the dowel into the heatsink
    • Place the dowel into the heatsink

  11. Place the spring on the spring block. Place the Idler arm with spring onto the idler pin.
    • Place the spring on the spring block.

    • Place the Idler arm with spring onto the idler pin.

    • Holding the spring in place will aid the insertion into the groove on the inside of the heatsink.

  12. Place the drive hobb assembly into the bearing pocket in the heatsink. The drive hobb assembly should line up with the slot in the heatsink. If the two bearings are not on the hobb shafts at this point place them on.
    • Place the drive hobb assembly into the bearing pocket in the heatsink.

    • The drive hobb assembly should line up with the slot in the heatsink.

    • If the two bearings are not on the hobb shafts at this point place them on.

  13. Place x4 M3 square nuts into the T slots on motor face. Place x4 M3 square nuts into the T slots on motor face.
    • Place x4 M3 square nuts into the T slots on motor face.

  14. Gather:
    • Gather:

    • Heatsink assembly

    • Motor assembly

  15. Place the heatsink onto the motor face. The aim is to line up the bearing on the drive hobb assembly with the bearing pocket on the motor face. Keep the motor facing upwards to prevent the square nuts falling out.
    • Place the heatsink onto the motor face.

    • The aim is to line up the bearing on the drive hobb assembly with the bearing pocket on the motor face.

    • Keep the motor facing upwards to prevent the square nuts falling out.

  16. Place the M3 screws into the two holes on the heatsink. Fasten the M3 screws with a 2.5mm Allen key
    • Place the M3 screws into the two holes on the heatsink.

    • Fasten the M3 screws with a 2.5mm Allen key

  17. To adjust the idler tension, rotate the thumbscrew at the top. Rotating clockwise (with the heat sink engraving facing you) increases filament tension. Rotating anticlockwise decreases filament tension.
    • To adjust the idler tension, rotate the thumbscrew at the top.

    • Rotating clockwise (with the heat sink engraving facing you) increases filament tension.

    • Rotating anticlockwise decreases filament tension.

  18. Recommended starting idler lever tension.
    • Recommended starting idler lever tension.

    • The white spring block should be flush with the front face of the idler lever.

    • Further adjustment may be required dependant on material being used, for example flexible filaments may require additional tension.

Finish Line

3 other people completed this guide.

Dan Rock

Member since: 06/07/2018

21,817 Reputation

40 Guides authored

4 Comments

anyone else having problems with under extrusion and also the filament being gauged out from idler tension? no instructions available on setting correct idler spring tension… Ive tried 12 prints now without a single successful print

Ryan - Reply

Keep tightening the idler knob well after it hits “the end”. You will then see the white part come out of the idler creating more tension on the spring.

Gab Cas -

hmmm are the gears supposed to look misaligned when assembled?

Taylor G - Reply

Ideally not, If you have any concerns, please contact support@e3d-online.com.

Dan Rock -

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