RapidChange Revo Support

Revo Roto Summary

• Drive type: Dual drive
• Mass: 140g (157g including Revo hotside and nozzle)
• Nominal steps per mm (16x microstepping): 2682
• Rotation distance (including the gear ratio): 26.8937
• Extrusion force: 70N+
• Gear ratio: 11.262:1
• Recommended current: 0.45A Peak (0.318A RMS)
• Maximum current: 0.6A Peak (0.424A RMS)
• Temperature sensor type: Thermistor, Semitec 104NT-4-R025H42G
• Motor voltage: 24V
• Fan voltage: 5V (12V/24V regulator boards available)
• Filament Diameter: 1.75mm

Performance Characteristics

• Maximum ambient printing temperature: 40°C

Service Temperatures

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

• Fan: 70°C
• Motor: 50°C
• Gearbox: 85°C
• Idler: 85°C

Fan Specification

Fan 2 wiresFan 3 wires

• Wire Length: 130mm
• Rated Voltage: 5 VDC
• Rated Current: 0.14 A + 10% Max
• Noise Level: 33.6 dB (A)
• Weight: 7g
• Black Wire: Ground
• Red Wire: Positive

Motor Specifications & Diagrams

• Motor mass: 50 g
• Motor wire length: 40mm
• Phase number: 2 phases
• Rated voltage: 4.5 VDC
• Recommended motor current: 0.45A Peak (0.318A RMS). Do not exceed 0.6A Peak (0.424A RMS).
• Resistance (20 °C): 7.5±10% Ω / Phase
• Holding torque: 75 mNm
• Detent torque: 5 mNm
• Rotate direction: ABCDA CW
• Step angle: 0.9°
• Rotor inertia: 7 gcm²

Heatsink Thermistor

• Cartridge length: 10mmv
• Cartridge diameter: 3mm
• Thermistor wire length: 70mm
• Temperature sensor type: Thermistor, Semitec 104NT-4-R025H42G

Filament Sensor

• Weight ≈ 14.4g
• Connector: JST SH SM04B-SRSS-TB(LF)(SN)
• Filament runout sensor
• Programmable action button
• Bi-color LED to show status:
• Red - no filament detected
• No Light - filament present
• Blue - action button is pressed

Filament Sensor Wiring

• Green wire - Action Button
• Blue Wire - Filament Sensor
• Red - VCC (3.3V-5V)
• Black - GND

Maintenance

• Do not remove the grease from the drive gears.
• Use a brush or compressed air to dislodge filament debris from hobb teeth.

Materials

• Heatsink: Aluminium
• Gearbox: Steel, POM
• Idler: Delrin
• Bushings: Oilite
• Fixings: Steel

Exploded View

RotoRoto SensoredRoto Bowden

Roto connectors

Recommended Mating Connectors

Revo Roto Dimensions

Revo Roto Upgrade Guides

There are no official upgrade guides for Roto available yet. However we have a selection of Beta mounts available on our printables:

Revo Roto Assembly Guides

Revo Roto Firmware

Warning

Revo Roto isn't a drop in repalcement for any specific 3D printer; therefore firmware modification will be required for safe operation.

Extrusion speed may be limited if stepper drivers are configured to use stealthChop mode as this mode limits the motor performance at higher RPMs which Roto can be susceptible to due to its high gear ratio. On most modern control boards this is disabled by default and spreadCycle mode is used instead. This is something you will see when you are configuring your stepper drivers via UART. However if you are running your stepper drivers in stand alone mode and using the trim pot to set your motor current, then your stepper drivers could be defaulting to stealthChop. This is a known issue with TMC2208 drivers.

These will vary depending on your chose hotside. Refer to the Revo hotside datasheets to confirm which temperature sensor and maximum temperature to configure.

Thermal Settings

These will vary depending on your chose hotside. Refer to the Revo hotside datasheets to confirm which temperature sensor and maximum temperature to configure.

Firmware

Motor Current

The Revo Roto motor has a lower current rating that many typical extruder setups, therefore if you attempt to power the motor with stock firmware settings.
Recommended current: 0.45A Peak (0.318A RMS)
Maximum current: 0.6A Peak (0.424A RMS)

Warning

Do not exceed 0.6A Peak (0.424A RMS) current in your firmware. Failure to adjust motor current prior to install is likely to cause permenant irreversable damage to both the motor and the Roto assembly.

Steps per mm

Nominal steps per mm (16x): 2682

Rotation distance

Rotation distance (including the gear ratio): 26.8937

Jerk

Jerk: 2.5 mm/s

Acceleration

Maximum extruder acceleration: 3000 mm/s²

Action Button configuration

Refer to this guide for configuration

Revo Roto Downloads

Hotside Options

Nozzle Options

Declaration of Conformity