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Sepio

  • Joined on May 04, 2016
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  • 4 times favorited
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  • Ultimaker 2+ Extended
    Utm2 plus extended small

    Ultimaker 2+ Extended

    Ultimaker 2+ Extended

Activity

Commented on MKII 5 Watt 3d printable Wind Turbine over 2 years ago
I added a 74 tooth GT2 pulley. https://www.youmagine.com/designs/gt2-main-shaft-pulley-for-mkii-5-watt-3d-printable-wind-turbine The 75 tooth pulley was a little bit to tight and was causing to much friction.
Contributed on MKII 5 Watt 3d printable Wind Turbine over 2 years ago
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Printed on:
Ultimaker 2+ Extended
Result:
I have changed the gears to a GT2 belt and pulleys to reduce the gear noise. More info is available here: https://www.youmagine.com/designs/gt2-main-shaft-pulley-for-mkii-5-watt-3d-printable-wind-turbine
Commented on MKII 5 Watt 3d printable Wind Turbine over 2 years ago
Hi Daniël, I have received the GT2 timing belts and pulleys. And I'am going to print some different sized main shaft pulleys to test the best pulley and belt combination. You said "The top pulley is 20 teeth, the bottom is 60 teeth and the belt is 158. This will maintain the 3:1 gear ratio." But if check the gears they have 48 and 24 teeth. This is a 2:1 gear ratio. What is the correct ratio? I have 4 different aluminum top pulleys with 16, 20, 28 and 40 teeth for the stepper motor shaft and I want to stay as close as possible to the optimal gear ratio.
Commented on MKII 5 Watt 3d printable Wind Turbine over 2 years ago
@Dan, did you also test longer rotor blades? Does this result in better power output in lower wind speed conditions? Or does this also change the way the PVP works? I like the AVP design. You should make an airplane or a (overdesigned) room ventilator (or ceiling fan) by powering the stepper motors. ;-)
Commented on MKII 5 Watt 3d printable Wind Turbine over 2 years ago
Hi Dan, I'am planning to use an aluminum top pulley and a printed shaft pully. I found this customizable (scad) design for the pulley. http://www.thingiverse.com/thing:16627 What where the number of teeth on your pulleys and what was the belt length? Sepio
Commented on MKII 5 Watt 3d printable Wind Turbine over 2 years ago
Hi Dan, To reduce the gear noise I have ordered some GT2 pulleys for the nema shaft and timing belts. I have already printed a large pulley for the rotor shaft. If I know which combination of nema pulleys , belt length and shaft pulleys works then I will share the information. I have also removed the voltage regulator from the electrical part inside the nacelle. I am going to put a step up down (boost buck) convertor on the bottom of the pole. I would like to get an output voltage of 5 volt so I will be able to charge an external battery pack. http://www.ebay.com/itm/122140717982?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Commented on MKII 5 Watt 3d printable Wind Turbine over 2 years ago
I used the following slip ring http://www.ebay.com/itm/172277912120?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT I bundled 3 wires for the positive side and 3 for the negative side. I tested it with a bench power supply and a 1.5 amp test load. This included 3 meter of speaker wire which goes through the pole. On the input side: 12.003 Volt, 1.514 Amp On the output side: 11,421 Volt, 1.4996 Amp