LGX Lite Extruder (no motor) - Bondtech

EXTRUSER LGX® LITE
Value of e-steps : 562 using 16 microsteps; 1124 using 32 microsteps.
Gears : hardened steel;
Material compatibility : abrasive, rigid, semi-flexible, flexible and soft.
Mounting holes : M3
Mounting schemes : bottom (4 points); right (2 points), in front of the motor (2 points), top (1 point)
Holes on the top of the LGX® Lite : 5 mm deep
Holes on the side of the LGX® Lite : 5 mm deep
Holes on the bottom of the LGX® Lite : 5 mm deep
Maximum extruder screw tension is 0.3 Nm

For Klipper users
rotation_distance = full_steps_per_rotation * microsteps / steps_per_mm
rotation_distance = 200 * 16 / 562
rotation_distance = 5.7

The above calculation assumes the following parameters:
the stepper motor is a 1.8 degree motor, so 200 as whole steps per rotation;
the microsteps are set to 16;
the recommended e-steps value for the LGX® Lite is 562.

retraction speed: 35 mm/s
retraction distance (bowden) : ~5 mm (0.4 + tube length[mm] x 0.015)
retraction distance (direct drive) for rigid materials: 0.4 mm
retraction distance (direct drive) for soft materials: 3 mm
Maximum ambient operating temperature: 90°C
Maximum stepper motor operating temperature: 120? / 750 mA
LGX® Lite net weight: 48 g
LGX® Lite with motor net weight: 141 g
Package size: 80x103x73 mm
Package weight: 85 or 185 g

CUSTOM STEPPING MOTOR FOR BONDTECH LGX
Connector: 4-pin JST-XH connector
Motor gear: 10 teeth
Motor length: 20 mm
Motor diameter: 36mm
Weight: 93g
Maximum current: 1.0 A / phase

To use the LGX, run the stepper motor with current between ~0.45 and ~0.65A:
Be vigilant about stepper motor surface temperature.
Keep it cool enough to touch. Lower the Vref otherwise.

Cable length: 1m
Step angle: 1.8 degrees
Maximum torque at: 1800 PPS
Potential flow @ Maximum torque: 120mm^3/s
Class: H, peak temperature rating 180?
Maximum operating temperature/current: 120? / 750 mA
Manufacturer: LDO
Manufacturer SKU: LDO-36STH20-1004AHG(XH)

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

Different 3D printer motherboards use different stepper motor drivers. Each type of stepper motor driver has its own formula to calculate the Vref needed 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 in regular mode and 1.2 in 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, which depends on which board you're using. Melzis use 0.1, Creality Silent boards use 0.15, ...



For technical specifications please visit the support page dedicated to Bondtech products: https://support.bondtech.se

The item you will receive may differ in some features from the one represented in the picture, depending on the production batch. Nevertheless, the functionality is maintained.