Hemera XS Datasheet

Hemera XS

DATASHEET

Warnings

Be aware of your electronics. Please don't work on your printer while it's turned on. We advise disconnecting from the mains during installation and maintenance.
During use and cooldown, there is a potential to burn your hands.
Please read and make sure you understand the firmware requirements before attempting to print.
Please check that the components' voltage matches your printer's voltage. Double-check the polarity of connections where appropriate.
Your HotEnd and printer are your responsibility. We cannot be held responsible for damages caused by our products use, misuse or abuse.

Summary

Drive Type: dual drive with adjustable tension idler
Max Printing Temperature: 300°C
Nominal steps per mm (x16): 397
Recommended current: 1.4A Peak (~0.99 RMS)
Filament diameter: 1.75mm

Note: Your own 3D Printer setup and filament choice will have an effect on the maximum VFR you can achieve so bear this in mind when referring to these values.

Volumes & Dimensions

Weight: 256.25g

Performance Characteristics

Maximum printing temperature: 300°C

Service Temperatures

Note, these are max ambient service temperatures of the components used, and not a guaranteed operating temperature of the system

Fan: 50°C
Motor: 85°C
Polymer bushing: 90°C
Bearings: 100°C
Acetal idler components: 120°C

Power Vs Temperature (Direct or with Revo HotEnd)

Initial Resistance of a 24V heater at 23°C: 14.4Ω
Temp Coefficient of HeaterCore: 0.002078
Temp Coefficient of Heater Cartridge: 0.002078

Mounting Guidance

Hemera is mounted to a flat surface via the T-slots on the left or right sides of the motor. Typically Hemera is mounted onto the left side, as the air from the heatsink cooling fan exits on the right. If mounting on the right, ensure that sufficient space is left for airflow.

The screws must protrude 3mm±0.25mm from the mounting surface to go into the T-slots. The supplied M3×8 mounting screws are suitable for a nominal 5mm mounting plate thickness. Hemera must be mounted on a minimum of 2 mounting points, if using 2 mounting points, diagonally opposing points should be used, in order to ensure rigidity.

Connections

Fan: Dupont 0.1”
Heater: Molex Micro-Fit 3.0, 2 pin horizontal
Temperature sensor: Molex Micro-Fit 3.0, 2 pin horizontal
Assembly is supplied with 1m cables to connect to mainboard

Fan Specification (Direct)

Width: 40mm
Depth: 10mm
Cable: 1000mm
Voltage: 12VDC and 24VDC
Current: 0.08A (12V) and 0.04A (24V)
RPMS: 7500±10% (12V) and 6900±10% (24V)
Speed: 7000RPM
Connector: Dupont 0.1”
Startup voltage: 6 VDC (12V) and 12VDC (24V)Airflow: 6.8 CFM
Static Pressure: 4.55 mmH20
Noise level: 33.6 dBA
Weight: 14g

Motor Specification & Diagrams

Motor cable length: 1000mm
Phase no: 2 phases
Rated voltage per phase: 3.22V
Recommended Current: 1.40A Peak (~0.99A RMS)
Resistance: 2.3Ω per phase
Inductance: 2.5mH
Holding torque: 180mNm
Detent torque: 10mNm
Rotate direction: ABĀB̅ CW
Insulation class: Class B
Rotor inertia: 24.3gcm²
Connector: JST - 56B - PH
Step angle: 1.8°
Motor mass: 160g

Maintenance

Do not remove the grease from the drive gears.
Compressed air is a recommended method of dislodging filament debris from hobb teeth.
Avoid using wire brushes on the hobb teeth or gears.

Materials

Heatsink: die cast aluminium (Direct)
Extruder cover: MJF Nylon (Bowden)
Gear/Hobb materials: stainless steel
Fixings: steel
Idler materials: Acetal
Bearing elements: 2x shielded 623 bearings (drive shaft), Igus bushing.

Note: Your own 3D Printer setup and filament choice will have an effect on the maximum VFR you can achieve so bear this in mind when referring to these values.