Live on Kickstarter! Dash, patent pending modular electric longboard

Great to hear, just make sure to optimize your parts also :slight_smile:

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Great too see your accomodating a flexible deck design…this is a strong selling point.

What size are the hub motors including the urethene?

Where are you based / where will the board ship from?

Good luck with your kickstarter campaign :+1:

Awesome board @TheRedPanda ! It’s always great to see more of these commercial boards come from people in the DIY community! Quick question: what is the kV of the hub motor on the single motor?

83mm including urethane

Boston based will ship from here.

Thanks!

why wont the motors run FOC?

It’s not that they can’t, our ESC is not setup for FOC currently. So if the vesc 6 ends up being awesome we can offer that and the motors can run FOC then.

as I remember jacobs motors couldnt run FOC for some reason with the vesc.

Yea running a commercial board with a VESC on FOC sounds like a bad idea. You’ll be dealing with a huge percentage of RMA’s.

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It only has to do with how they’re wound delta vs wye.

Exactly. The big hubs + FOC was very unreliable unfortunately. Which doesn’t make the VESC bad in any way, it just wasn’t designed to handle this particular application.

was it the voltage spikes or something…will higher rated componets allow FOC? Or you’re saying it’s because jacob’s are wound wye?

It’s only how you spec the winding in the factory to be wound wye or delta. The problem was that FOC on the VESC wasn’t able to reliably drive the big hubs. So it wasn’t that the motors couldn’t handle it.

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ok. just curious why it wasnt reliable if you know.

We actually discussed this already http://www.electric-skateboard.builders/t/small-wheel-hub-motors/6590?u=theredpanda

where is an explanation of why the jacob motors couldnt do foc? that’s a long thread and dont see where it could be. if you know.

My mistake, the conversation in that thread was about high voltage affecting the VESC. How that plays into big hubs is that to get to a nice top speed of around 20mph you need to have a higher voltage than you would if it was geared down with a belt and pulley system. My knowledge base is primarily around mechanical components, but from what I’ve found the increased voltage + faster switching in FOC was pushing the VESC’s limits therefore causing a less reliable system than if the VESC was designed specifically for that kind of application.

a typically hub motor has a lower kv and therefore less electrical switching necessary. if the vesc’s components were specd for a higher voltage than now the vesc and motor could do 100 volts no problem as the erpm of the vesc is way higher than needed with 90kv or 70kv or whatever number around there. think the limit is 8600 erpm max. kv times volts times 7 determines the erpm the vesc will hit.

When do you expect to ship if your kickstarter is successful?

No matter the technology getting better, imo it looks much cleaner to have a rack for your boards and hidden cords for your Battery pack to sit in a nice stand and charge or docking bay. :slight_smile: Imagine how sweet that could look to have the battery back on a glowing charge dock and the boards nice and neat on the wall with no cords hanging around.

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We’re aiming to ship by May 2017 so that people can have their Dash ready for the summer!