EMF Hub motor final sale!

This is a direct fit no mods needed. Once the design gets approved by the manufacturer we can pick a color. I’m thinking black but I’m open to ideas. We need to get $500 bucks to put them into production.

I am down for a set.

I thought @Alextech is giving us a head start.

Put me down for a set as well. Wouldn’t mind Black as well. What’s the quality of the Urethane like.

count me in, 97mm or 100mm or 107mm. Black works.

Jakob’s hubs with 91mm urethane:

https://www.electric-skateboard.builders/t/jacobs-dual-hubs-vescs-10s3p-5-1-ah-lipo-winning-remote-drop-through-deck/11967/11

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Guys this is another option being developed I invited him over to the thread to interact with you in case anyone might want to go with his strategy. Bring anyone else in to discuss ideas to make a good solution and track progress.

Today I tried Jacob’s hubs in FOC Mode. The silent sound is really amazing, just one thing is a bit strange. When I connect the battery and start riding, the first meters the motors are not run smoothly. It feels like you ride on a very rough road. After few meters everything is fine and even if I stop and start again it is not running as rough as before. When I disconnect and connect again, same thing happens. I know @Maxid runs also with enertion 4.12 VESCs in FOC. Did you experience something like this. Is there anybody else running this hubs in FOC Mode? Btw. I use the firmeware 2.54 of @ackmaniac - watt no rev. with brake.

Changed back to BLDC mode after having a momentary DRV error (the VESC restarted and did not show the error again but I am not going to risk it)

You need to change the shunts if you are going to use foc with these motors. You need a higher resolution for detecting the motors correctly. Changing the shunts will also reduce the current you can run through the motors.

Hey @jacobbloy. Are you back in the motor game? Kind of regretting I sold on my hubs now. Especially now the thane issues seemed to be getting sorted.

Did you have any abnormalities before you got the drv fault?

Did you change the shunts on your VESC? Is it difficult to unsolder and solder them (I’m not bad in soldering but I’m not a SMD-Solderman). Is the “Observer Gain” value between 60 and 100 meant with 5mOhm shunts or original shunts or both?

How much? Motor max 30A would be fine?

Btw. you should come back to the “motor game”, because your Hubs just need a bit of modification then they are great. I’m happy that I got used hubs from @bigben.

no - I only noticed because I used @Ackmaniac’s App that recorded the fault.

True @jacobbloy - I am very happy with my Hubs so far. Only minor improvements should/could be made:

  • no air pocket for smoother ride and no urethane slipping
  • use solid metal rods instead of screws to keep stator from spinning on the axle
  • slightly bigger grub screw (or better yet: a bolt) plus flat spot on axle
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Use stainless grub screws and the stator won’t rotate . To can add a little retaining fluid to bind it on there good.

The urethane issues are fixed.

never experienced them actually. I have tried several grub screws - but a slight back and forth movement is always there. With tighter tolerances this could be improved

If there is back and forth your drilling your holes in your truck too large.

I don’t even use the 3rd locking grub screw and I don’t get any movement at all.

Glad to hear you don’t have urethane issues! Enjoy

I use the standard truck the motors came with and did not do anything to their grub screws. I also don’t have urethane issues because I put my own 3D printed nubs there right from the start.

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Will these put back in production or is somoene selling his/her hub motors? :slight_smile: Want to test them vs the carvon dual v2’s