LGX® Lite V2 Large Gears eXtruder

New in V2:

• Tighter tolerances
• improved build quality: sturdier 2 parts housing design, precise stepper motor centering
• extra mounting point
• increased resistance to heat
• micro form factor, featherweight and small footprint
• enhanced filament grip
• and that Bondtech black Look : )

Includes full size LGX Large Gears, maintenance windows and filament tension lever with 3 presets (open; rigid; flexible).

This extruder only supports 1.75 mm size filament.

The Bondtech LGX Lite V2 is a filament feeder based on the LGX® Large Gears eXtruder and uses Bondtech’s new Dual Drive Technology based on larger drive gears.

Each LGX Lite V2 extruder is supplied with:

• 1x LGX Lite V2 feeder
• 1x Nema14 Round 20mm pancake stepper motor (mounted on extruder), only incl. in variant incl. stepper motor
• 1m long lead cable
• with JST-XH 4-pin connector
• 1x 2mm Hex Key (recommended tool)
• 1x Powered By Bondtech sticker
• Also shipping with additional accessories:
• 1x Push-fit collar (inserted)
• 1x 30mm PTFE tube to use in the PTFE Tube Adapter
• 8x M3 square nuts for reinforcing mounting holes (inserted)

8 features of this Bondtech eXtruder:

• Larger drive wheels, for increased filament grip
• Filament pre-tension lever, for repeated results
• Drive wheels’ maintenance windows, for easy cleaning
• Compact, light & centered filament path, for increased performance and compatibility
• Multiple mounting hole patterns, for easy and flexible setup
• Compatible with Nema14 round stepper motors
• Craft boxes without bleaching & no coating.

3D Printed Housing using PA12 GF

The housing parts are professionally printed with polyamide 12 Glass Filled for maximum strength, precision and higher temperature resistance.

To lower our ecological impact we are reducing our use of chemical dyes. This part is supplied with a wax protective coating to lower sensitivity to moisture and grease, while remaining fully functional.

Download Step files here

Technical Data Sheet here

Stepper Motor (only included in variant with stepper motor):

• CUSTOM STEPPER MOTOR FOR BONDTECH LGX®
• Connector: JST-XH 4-pin connector
• Motor gear : 10 teeth
• Motor length: 20 mm
• Motor Diameter: 36mm
• Weight : 93g
• Max Current : 1.0 A / phase
• To use the LGX, run the stepper motor with currents between ~0.45 and ~0.65A:
• Be vigilant regarding the stepper motor surface temperature.
• Keep it cool enough to touch. Lower Vref otherwise.
• Leads Length : 1m
• Step Angle : 1.8 degree
• Max Torque at : 1800 PPS
• Potential Flow Rate @ Max Torque : 120mm^3/s
• Class: H, rated peak temp 180℃
• Max operating Temperature / Current : 120℃ / 750 mA
• Manufacturer : LDO (LDO-36STH20-1004AHG(XH))
• Check for more info here

How to change the Current using Vref

It is very hard to read the current being fed to stepper motors. To determine that current we rely on the Vref value. The Vref value is a voltage reference measured in VDC that can be read using a multimeter. It helps us setting the current output of the stepper motor driver.

Different 3D printer mainboards use different stepper motor drivers. Each type of stepper motor drivers has its own formula to calculate the required Vref to get a specific current. Here are some examples:

• TMC stepper drivers.
  The formula for these drivers is Vref = ( I * 2.5 ) / Imax
  Where I is the target current value measured in A; and Imax is 1.77 on regular mode and 1.2 on SilentStepSticks mode.
• Pololu A4998.
  The formula for these drivers is Vref = I * 8 * R
  Where I is the target current value measured in A; and R is the Sense Resistor value, that depends on what board are you using. Melzis use 0.1, the Creality Silent boards use 0.15, …