Thingiverse
Dondolo v1.01b by Gianni3D
by Thingiverse
Last crawled date: 3 years ago
Dual rocking extruder for Prusa i3.
Direct extrusion with a single stepper motor.
Basculating heads prevent inactive nozzle to interfere with the part already printed avoiding contamination.
Anti-oozing system.
Reduced mass allow direct extrusion.
09/05/2016
In order to make the project more "readable" I tried to simplify and put in some order.
i) Eliminated the 3mm version (too hard to make it working!)
ii) Added 0.5mm clearance from heatsink to backplate, so modified Idlers, Idlers_pivot and Pendulum.
iii) Modified Idlers to avoid mutual interference and Servo_Cam interference
iv) Modified the fan duct (print fan) for a more efficient cooling
v) Added "mouse ears" to Pendulum and BackPlate to improove adesion and make prints easier ( if you don't want them you can do a "Divide ojects" and remove).
24/03/2016
Dual Dondolo on CoreGF: automatic head changehttps://youtu.be/E3vc4A_5x28
05/12/2015
Published the "DONDOLO v1 Assembly Guide rev_10.pdf" to help during the assembly procedure.
Published the "PTFE Cutting Tool" to help cutting the PTFE tube in the proper way.
13/10/2015
Added a driving wheel spacer fo use with E3D MK8 type driving wheel. Insert the driving wheel in reverted position, ( the grub screw outside ).
Firmware configuration tool available at: http://marlinkimbra.it/
thanks to MagoKimbra (Alberto Cotronei).
No more need to manually adapt the fw, you can configure and dowload an advanced version of Marlin supporting Dondolo (among other interesting multicolor extruders like "4 Way Flux Capacitor":http://www.thingiverse.com/thing:498922)
BOM in the instructions.
Note: the Cam _Pendulum is the part you have to "tune" depending on your filament diameter and drive gear effective diameter. Here is for 3mm filament and a 7mm drive gear (made hobbing a 8mm round bar).
19/May/2015
Is ready the version for E3D v6 1.75mm filament hotends:
Pendulum_E3Dv6_175.stl
Cam_Pendulum_175.stl
Tested Mk8 E3D drive gear,... very good drive gear, I strongly reccomend it.
Also added a "front bar" to increase the stiffness of assembly.
Thank you.
:-)
First test:http://youtu.be/gPh625bMtUg
Anti-oozing test:http://youtu.be/gTiOnj0SXrU
Change Log:
Ver. 1.02
Changed the hotend dual fan duct from 25mm to 30mm (4 CFM)
Ver. 1.01r
updated Cam Pendulum (Cam_Pendulum_101r.stl) the older was'nt enough to keep the clearance of the inactive filament from drive gear (for 3mm filament).
Ver. 1.01
minor changes on :
pendulum to increase stiffness and
idlers and pendulum cam to increase pression from spring to filament and stability on bistable system.
Direct extrusion with a single stepper motor.
Basculating heads prevent inactive nozzle to interfere with the part already printed avoiding contamination.
Anti-oozing system.
Reduced mass allow direct extrusion.
09/05/2016
In order to make the project more "readable" I tried to simplify and put in some order.
i) Eliminated the 3mm version (too hard to make it working!)
ii) Added 0.5mm clearance from heatsink to backplate, so modified Idlers, Idlers_pivot and Pendulum.
iii) Modified Idlers to avoid mutual interference and Servo_Cam interference
iv) Modified the fan duct (print fan) for a more efficient cooling
v) Added "mouse ears" to Pendulum and BackPlate to improove adesion and make prints easier ( if you don't want them you can do a "Divide ojects" and remove).
24/03/2016
Dual Dondolo on CoreGF: automatic head changehttps://youtu.be/E3vc4A_5x28
05/12/2015
Published the "DONDOLO v1 Assembly Guide rev_10.pdf" to help during the assembly procedure.
Published the "PTFE Cutting Tool" to help cutting the PTFE tube in the proper way.
13/10/2015
Added a driving wheel spacer fo use with E3D MK8 type driving wheel. Insert the driving wheel in reverted position, ( the grub screw outside ).
Firmware configuration tool available at: http://marlinkimbra.it/
thanks to MagoKimbra (Alberto Cotronei).
No more need to manually adapt the fw, you can configure and dowload an advanced version of Marlin supporting Dondolo (among other interesting multicolor extruders like "4 Way Flux Capacitor":http://www.thingiverse.com/thing:498922)
BOM in the instructions.
Note: the Cam _Pendulum is the part you have to "tune" depending on your filament diameter and drive gear effective diameter. Here is for 3mm filament and a 7mm drive gear (made hobbing a 8mm round bar).
19/May/2015
Is ready the version for E3D v6 1.75mm filament hotends:
Pendulum_E3Dv6_175.stl
Cam_Pendulum_175.stl
Tested Mk8 E3D drive gear,... very good drive gear, I strongly reccomend it.
Also added a "front bar" to increase the stiffness of assembly.
Thank you.
:-)
First test:http://youtu.be/gPh625bMtUg
Anti-oozing test:http://youtu.be/gTiOnj0SXrU
Change Log:
Ver. 1.02
Changed the hotend dual fan duct from 25mm to 30mm (4 CFM)
Ver. 1.01r
updated Cam Pendulum (Cam_Pendulum_101r.stl) the older was'nt enough to keep the clearance of the inactive filament from drive gear (for 3mm filament).
Ver. 1.01
minor changes on :
pendulum to increase stiffness and
idlers and pendulum cam to increase pression from spring to filament and stability on bistable system.
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