Thingiverse
Lenz2 helical turbine by databeestje
by Thingiverse
Last crawled date: 3 years ago
This is a helical version of Ed Lenz' Lenz2 turbine blade. His homepage is here http://www.windstuffnow.com/main/lenz2_turbine.htm
Dimensions: this should give a 120mm diameter, 160mm height windmill.
2013-06-09: Hey look, I made a larger one - http://www.thingiverse.com/thing:99132
31-5-2013: I managed to print the last layer last week and the turbine is now spinning in the wind. I started thinking about making a larger version of this that i can still print on the 200mm print bed.
The larger version that i am working on is going to be mounted on a electric bicycle brushless 3 phase hub motor of about 200 Watts. It will also use aluminium arms (20×2mm flat) instead of the plastic ones.
The new thing id will follow later.
18-05-2013: Crud, broke the pulley on my 3D printer, posted the picture of it on a wooden stick on the back of my shed. It only has 2 layers now, 3rd one later when I fix the printer.
18-05-2013: Just uploaded a double bearing holder so I can mount it on a 44x44mm wooden pole. The bearings I am using have a 32mm outer diameter. They are not really the correct size for a 12cm diameter windmill. I'm planning a larger one for later. The bearing holder doesn't print very well, word of caution.
I've also reuploaded the single blades for 30 and 40 degrees which now have a 1 degree resolution. Same thing, looks nicer, takes longer to slice.
Also turns out you can print 3 single blades and a hub on a single 20x20 bed. When printing on scale 1:1 you can apparently print these without support which makes them look a lot prettier.
Printing a single blade at 0.3mm height takes about 1 hour 45 minutes here. Printing 3 at once with hub is about 4 hours. Seems like a good deal.
16-05-2013: Uploaded a hex center hub to mount the single blades on. I'll probably add a hex nut cage on it for easier assembly. Perhaps nut cages on the blade mounting hole would make sense too.
15-05-2013: I just uploaded a new single blade with mounting hole which can be mounted on a central. That way you can mount 3 of these for a single 1/3 rotation (40 degrees of 120) 53,3mm high helical form. This allows for making a larger version(s) with the limitation that 3D printers have in build volume.
With repetier host you can easily scale a single blade by a factor of 3 to get a 160mm high single blade. That would result in a 480mm high windmill! Still working on the central hub, still evaluating CAD programs to do my bidding.
14-05-2013: I'll be adding seperate blades with different heights and a hub carrier so it's easier to print larger versions with the restricted print bed size. Should have this done this week.
I don't recommend printing the entire helix with supports, as these will overlap with the next blade. (That won't be a issue with seperate blades)
The model is a bit too complicated for Sketchup, which it also imports every dimension multiplied by 25,4. That means it is doing the unit conversion wrong. That is a issue with the STL importer for Sketchup.
These STL files are hole free and should go through Slic3r without warnings.
Dimensions: this should give a 120mm diameter, 160mm height windmill.
2013-06-09: Hey look, I made a larger one - http://www.thingiverse.com/thing:99132
31-5-2013: I managed to print the last layer last week and the turbine is now spinning in the wind. I started thinking about making a larger version of this that i can still print on the 200mm print bed.
The larger version that i am working on is going to be mounted on a electric bicycle brushless 3 phase hub motor of about 200 Watts. It will also use aluminium arms (20×2mm flat) instead of the plastic ones.
The new thing id will follow later.
18-05-2013: Crud, broke the pulley on my 3D printer, posted the picture of it on a wooden stick on the back of my shed. It only has 2 layers now, 3rd one later when I fix the printer.
18-05-2013: Just uploaded a double bearing holder so I can mount it on a 44x44mm wooden pole. The bearings I am using have a 32mm outer diameter. They are not really the correct size for a 12cm diameter windmill. I'm planning a larger one for later. The bearing holder doesn't print very well, word of caution.
I've also reuploaded the single blades for 30 and 40 degrees which now have a 1 degree resolution. Same thing, looks nicer, takes longer to slice.
Also turns out you can print 3 single blades and a hub on a single 20x20 bed. When printing on scale 1:1 you can apparently print these without support which makes them look a lot prettier.
Printing a single blade at 0.3mm height takes about 1 hour 45 minutes here. Printing 3 at once with hub is about 4 hours. Seems like a good deal.
16-05-2013: Uploaded a hex center hub to mount the single blades on. I'll probably add a hex nut cage on it for easier assembly. Perhaps nut cages on the blade mounting hole would make sense too.
15-05-2013: I just uploaded a new single blade with mounting hole which can be mounted on a central. That way you can mount 3 of these for a single 1/3 rotation (40 degrees of 120) 53,3mm high helical form. This allows for making a larger version(s) with the limitation that 3D printers have in build volume.
With repetier host you can easily scale a single blade by a factor of 3 to get a 160mm high single blade. That would result in a 480mm high windmill! Still working on the central hub, still evaluating CAD programs to do my bidding.
14-05-2013: I'll be adding seperate blades with different heights and a hub carrier so it's easier to print larger versions with the restricted print bed size. Should have this done this week.
I don't recommend printing the entire helix with supports, as these will overlap with the next blade. (That won't be a issue with seperate blades)
The model is a bit too complicated for Sketchup, which it also imports every dimension multiplied by 25,4. That means it is doing the unit conversion wrong. That is a issue with the STL importer for Sketchup.
These STL files are hole free and should go through Slic3r without warnings.
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