Mostly 3d printable dual gear extruder

Yet another mostly 3d printable dual gear extruder

3D printer parts and enhancements

GPLv3

A free software license that requires that all work based on this must also be free software as in freely remixable and sharable by anyone under the same license but may be used commercially.

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Description

I wanted a little more torque (1:3 gearing) and also better filament grip. So I made a case that fits two gt2 pulleys and set of bondtech gears.

Materials and methods

Tension screw
(x1)extruder tension spring
(x1)m3 screw L50mm to tension latch
(x1) m3 brass incert L4mm for tension screw knob

latch
(x1)m3 screw L30mm on latch hinge
(x2)m3 spacer L4mm ID3mm OD6mm on hinge

Top case
(x3) m3 screw L30mm to fascen top case to center case
(x1) m3 brass incert L4mm for tension screw
(x3) m3 spacer L4mm ID3mm OD6mm for filament insert and hinge
(x1) mr128 bearing L3.5 ID8mm OD12mm for 8mm extruder shaft
(x1) bowden coupler M9 thread 6mm tube insert

Center case
(x3) m3 brass incert L4mm to fascen top fasceners
(x1) mr128 bearing L3.5 ID8mm OD12mm for 8mm extruder shaft
(x3) m3 screw L28mm to fascen center case to bottom case

Bottom case
(x4) m3 brass incert L4mm for center fasceners
(x1) mr128 bearing L3.5 ID8mm OD12mm for 8mm extruder shaft
(x2) m3 screw L11mm to fascen top part of extruder
(x2) m3 screw L25mm to fascen bottom part of extruder

Additional parts
(x1) Shaft L55mmxD8mm for gear (may have to add your own flat)
(x1) bondtech gear set with W4mmxL22mm rode
(x1) Gt2 60T pulley W10mm
(x1) Gt2 20T Pulley W10mm (.5-1mm out of shaft)
(x1) Gt2 closed loop belt L150mmxW10mm
(x4) m3 washers when fascening bolts to extruder motor

Update Ultimaker firmware
download Tinkergnome:
https://github.com/TinkerGnome/Ultimaker2Marlin/releases
Upload using cura:
settings --> printer --> Manage printers --> Select printer and click update firware --> Upload custom Firmware

Change esteps on extruder
Maintenance --> Advanced --> preferences --> Motion settings --> Axis steps/mm
Change E from 282 to 587 (number derived from calibration test)
Save changes

Invert extruder
Maintenance --> Advanced --> preferences --> Motion settings --> Invert Axis
Invert E
Save changes

(optional) Run a 100mm calibration test
Create a file called "calibration.gcode" and add the following entries
M302
G91
G1 E100.0 F300
G90
Save it to an SD card and print it. It should move 100mm of filament through the extruder.

Note: i Printed the case at 30mm/sec to keep tight tolerances.

Documents

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Comments

18e49862e00cd397002147d7aafb882d?default=blank&size=40Saul Mendoza published this design ago