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Marblevator, Spirals.
An "inverse auger" Marblevator.
Gadget
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Description
"Marblevator, Spirals" is a two revolution downward spiraling Marblevator incorporating what I refer to as an "inverse auger" design.
In traditional "Archimedes Screw" styled marble lifts (I refer to the "screw" here as an "auger"), the auger is in the center and rotates while the guide rails are external and stationary. In this model, the guides are in the center and rotate while the auger is external and stationary and holds the spiraled track.
Designing the model in this manner provides easier 3D printing without the need for supports. However, I also designed the track so that it would "over rotate" the marbles to slow their descent. The model uses 8mm ball bearings for marbles, and the track rails are 7.9mm wide, so the ball bearing rides down the track rails and not the track bottom, which over rotates the ball bearings thus providing a slower descent. So with dimensions this tight I used the "Engineering Profile" in Cura 4.1.0 for accurate 3D printed parts the model requires.
Designed using Autodesk Fusion 360, sliced using Ultimaker Cura 4.1.0, and 3D printed in PLA on Ultimaker S5s.
Materials and methods
I 3D printed all parts at .15mm layer height, 20% infill, and no supports. I performed my usual sanding, filling, etc. process as in my previous projects to remove excess PLA as required.
The video shows assembly and operating instructions as well, but to assemble the model, I performed the following steps:
• Soldered red and black wires to the gear motor.
• Pressed the gear motor into "Track.stl", noting a small dot of cyanoacrylate glue may be required to retain the motor.
• Routed the wires out the side of the track assembly.
• Inserted "Barrel.stl" into the track assembly, then pressed it onto the motor shaft, noting the position of the motor shaft and barrel flats.
• Pressed "Cap.stl" onto the track assembly, noting a small dot of cyanoacrylate glue may be required to retain the cap.
Once assembly was complete, I attached a 3VDC power source to the model making sure the barrel rotated counter clockwise as viewed from the top of the model, then added the ball bearings.
And that is how I 3D printed and assembled "Marblevator, Spirals".
I hope you enjoyed it!
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Comments
Redwine printed this ago
- Printed on:
- Wanhao Duplicator i3
- Result:
- Decent..the box for the motor was .1mm too small..had to use straight files to fit..good fit with a little elbow grease. Top of barrel was messed up, but the cap made it stable. Roller spirals were perfect! Working model Love it
- Feedback:
- Great design..only hard part was figuring out how to get the support material out of the inside of the spiral. I used various needle nose pliers and small screwdrivers to dislodge and shake out. Wonderful results.
Redwine printed this ago
- Printed on:
- Wanhao Duplicator i3
- Result:
- Decent..the box for the motor was .1mm too small..had to use straight files to fit..good fit with a little elbow grease. Top of barrel was messed up, but the cap made it stable. Roller spirals were perfect! Working model Love it
- Feedback:
- Great design..only hard part was figuring out how to get the support material out of the inside of the spiral. I used various needle nose pliers and small screwdrivers to dislodge and shake out. Wonderful results.
Redwine printed this ago
- Printed on:
- Wanhao Duplicator i3
- Result:
- Decent..the box for the motor was .1mm too small..had to use straight files to fit..good fit with a little elbow grease. Top of barrel was messed up, but the cap made it stable. Roller spirals were perfect! Working model Love it
- Feedback:
- Great design..only hard part was figuring out how to get the support material out of the inside of the spiral. I used various needle nose pliers and small screwdrivers to dislodge and shake out. Wonderful results.
Cerulean Ronin added this to the Crafts collection ago
cdobis commented agoLove this thing! I want to make sure I buy the correct motor, do you have a link or reference to this gear motor? I don't want to get the wrong one.
Thanks,
Craig
Tennessee
Kenneth Tolopka added this to the Collection 1 collection ago
3DRay added this to the Things to Print collection ago
Greg Zumwalt published this design ago