Revision as of 16:04, 23 August 2020

3 phase no feedback Controller - 12V 30A - [1] $6.42 + $2.30 Shipping
- US $17 - [2]
Fidget Spinner Bearings (22mm total diameter, 8mm bore and 7mm width)
- Amazon Source ~10 USD for 20; ~0.50 USD per bearing
8 Disc magnets per rotor (8 mm thickness, 20mm diameter) 26.42 USD for 20. Much more for USA source - $3 each - so $24/motor. [3]
- Ebay - around $2 equivalent - [4]
Copper wire (0,2 mm diameter max. definitely not more because you will get eddy current issues) [5] (Enameled copper wire ie Magnet Wire )
- Cost of $1-2 per motor using the $7 spools.
Bit of brass tubing (4 mm outer diameter) to connect the coil endings in. [6]
Solder
Glue (the type that sticks)
8 mm metal rod for an axle (offcuts from universal axis are great for this)
3d printing filament (kg estimate, also infill needed)
a little bit of epoxy to glue the magnets in place [7]

Links

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 * 3 phase no feedback Controller - 12V 30A - [https://www.ebay.com/i/362671207620?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=362671207620&targetid=917185845248&device=c&mktype=pla&googleloc=9023315&poi=&campaignid=10459841973&mkgroupid=104612009900&rlsatarget=pla-917185845248&abcId=2146002&merchantid=137736463&gclid=EAIaIQobChMIiab0r7X66gIVzZ6zCh2hawOYEAQYAyABEgL6tfD_BwE] $6.42 + $2.30 Shipping
+**US $17 - [https://www.amazon.com/RC-Brushless-Electric-Controller-bullet/dp/B071GRSFBD/ref=pd_sim_b2b_2/136-7884747-3436123?_encoding=UTF8&pd_rd_i=B071GRSFBD&pd_rd_r=f6f6a4ff-4837-45fa-a525-b30f86465d6f&pd_rd_w=h0l5I&pd_rd_wg=hRY46&pf_rd_p=a07701e4-f565-442a-b97f-93ab23cbb7ef&pf_rd_r=JJBC165G4T776GEWF4AW&psc=1&refRID=JJBC165G4T776GEWF4AW]
 * Fidget Spinner Bearings (22mm total diameter, 8mm bore and 7mm width)
 **[https://www.amazon.com/Pack-608-2RS-Ball-Bearing-Skateboards/dp/B07C6FL8TW/ref=lp_16411051_1_3?s=industrial&ie=UTF8&qid=1596637217&sr=1-3 Amazon Source ~10 USD for 20; ~0.50 USD per bearing]