10S custom skate ESC: testers wanted!

Lightweight / Folding / Portable EVs - seats optional
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sl33py   10 kW

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Re: 10S custom skate ESC: testers wanted!

Post by sl33py » Jul 09 2015 11:51am

pf26 wrote:Thks Lizard, actually I use the VESC + SK6374 on a recumbent Ebike. So I can attach the display to the bike frame, and probably some kind of modified GPS fixture will do. But I also need to design some shading means to improve readability in the sun. Good job for 3D printing I suppose;
You can also use a motorcycle mount for this, depending on your bar size i bet there's one already made.
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There are a ton - the waterproof ones are nice but a bit clunky and $.

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Vanarian   10 kW

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Re: 10S custom skate ESC: testers wanted!

Post by Vanarian » Jul 09 2015 12:23pm

This is where a device like google glasses would be useful, to get a headset HUD :wink:
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lizard   100 mW

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Re: 10S custom skate ESC: testers wanted!

Post by lizard » Jul 09 2015 12:50pm

Ah, it's going on a bike, didn't realize that. In the FPV hobby sunshades are quite common, if you google for 'fpv sunshade' or 'fpv cellphone sunshade' you should find something.

furp   100 W

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Re: 10S custom skate ESC: testers wanted!

Post by furp » Jul 09 2015 3:49pm

Guys, I need a little help with my vesc programming. I got the right ubuntu (dual boot) on my laptop and went through the whole tutorial successfully up to the point of connecting the vesc via usb. When I try that (with the right cable) I get unknown error. I don't see and lights on on the vesc either. What else can i try?

Also: should I manage to get in connected, can i just run the motor testing with a 6s battery or do I need something else?
Thanks!

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Re: 10S custom skate ESC: testers wanted!

Post by chuttney1 » Jul 09 2015 10:26pm

furp wrote:Guys, I need a little help with my vesc programming. I got the right ubuntu (dual boot) on my laptop and went through the whole tutorial successfully up to the point of connecting the vesc via usb. When I try that (with the right cable) I get unknown error. I don't see and lights on on the vesc either. What else can i try?

Also: should I manage to get in connected, can i just run the motor testing with a 6s battery or do I need something else?
Thanks!
1st thing, make sure power is connected to the VESC. The VESC doesn't power by usb cable alone. The green and blue led lights should come on when connected to a power source. The VESC can be powered with a 9V battery, but for sufficient current for motor testing a 12V sealed lead acid battery should also work. I only say 12V assuming you hand soldered your own VESC to prevent damage to the DRV8302. Once you connect, you will be able to do motor testing.

furp   100 W

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Re: 10S custom skate ESC: testers wanted!

Post by furp » Jul 10 2015 10:12am

Oh well, should have watched the vid a 5th time! Thanks chuttney! I did not solder the VESC myself, I bought it from jacobbloy and it has everything already on it including the big cap. So can I use any voltage lipo for testing? Or will I need some kind of current limiter as I have read somehwere?

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Re: 10S custom skate ESC: testers wanted!

Post by pkondratyuk » Jul 10 2015 11:28am

@furp: if your VESC is from the Enertion Beta batch, be aware that 8 ceramic capacitors on that board are off-spec (they are 1 uF instead of 10 uF). Ideally you would need to desolder those capacitors and replace them with the correct ones.

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Re: 10S custom skate ESC: testers wanted!

Post by chuttney1 » Jul 10 2015 1:28pm

furp wrote:Oh well, should have watched the vid a 5th time! Thanks chuttney! I did not solder the VESC myself, I bought it from jacobbloy and it has everything already on it including the big cap. So can I use any voltage lipo for testing? Or will I need some kind of current limiter as I have read somehwere?
Any voltage between 9V and 60V or between a 3S and 12S lipo battery. The processor of the VESC needs a minimum of 8.somthing volts to run, I forgot what it is when I tested it for minimum voltage. Vedder uses a lab power supply to limit current serves as a precaution. Best to play it safe with the current before cranking up the voltage not to damage the DRV8302.
Before you do any of the above in what I have wrote. Confirm with jacobbloy about any of the parts used in the VESC since Im not sure if you got yours as part of the VESC batch from Onloop. He owns Enertion Boards, but I think you already know that. Pkondratyuk comment applies to this since there was an issue with the VESC beta batch a few pages back.

furp   100 W

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Re: 10S custom skate ESC: testers wanted!

Post by furp » Jul 10 2015 1:35pm

OK thanks for the warnig! Will check with Jacob, but I am afraid I might have one of that batch. Hopefully the parts are labeled so I can just read the specs. Anyway, sending it back will not be an option due to shipping and taxes. Can that ESC still be used? Looking at 40 amps max.

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Re: 10S custom skate ESC: testers wanted!

Post by okp » Jul 10 2015 1:57pm

furp, I sent three VESCs back to Australia; cost me 20 euros of shipping; no taxes - specify RMA.

furp   100 W

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Re: 10S custom skate ESC: testers wanted!

Post by furp » Jul 10 2015 2:03pm

Hm, where did you ship from? And was it jacob that you returned them to? I have not heard of anything like that from him. Anyway, I payed 30 euro taxes for this one, so might have to pay for replacement ones once again unless i fake something which seems shifty.

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Re: 10S custom skate ESC: testers wanted!

Post by okp » Jul 10 2015 2:08pm

Paris/France. Ship it back to Onloop (Onloop Beta)

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Re: 10S custom skate ESC: testers wanted!

Post by pkondratyuk » Jul 10 2015 3:56pm

@furp: I had two Enertion Beta VESCs also. In principle you can replace the capacitors yourself, if you are good with soldering. I went the easy way and sent my VESC to silviasol, he replaced the caps, and the price was good. Silviasol is his nickname on this board. Message him and see if he can do the same thing for you. Vedder had said having the wrong caps can cause the DRV8302 chip to fail, so I did not want to take the risk. Both controllers are working fine so far (I am using them with a 10S battery, 280KV motor).

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rodgah   10 kW

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Re: 10S custom skate ESC: testers wanted!

Post by rodgah » Jul 14 2015 3:23am

Just throwing it out there......how large would a vesc get if it were made with thru-hole components and headers for stm & drv (if thats even possible) ?
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Re: 10S custom skate ESC: testers wanted!

Post by 777arc » Jul 14 2015 1:16pm

rodgah wrote:Just throwing it out there......how large would a vesc get if it were made with thru-hole components and headers for stm & drv (if thats even possible) ?
2-3x as big imo. Bigger problem is it would cost at least 2x as much to make.

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Re: 10S custom skate ESC: testers wanted!

Post by silviasol » Jul 14 2015 6:10pm

rodgah wrote:Just throwing it out there......how large would a vesc get if it were made with thru-hole components and headers for stm & drv (if thats even possible) ?
I don't think that will work because I remember vedder saying he had to reposition the capacitor that connected to one of the end pins so it is closer to the drv8302. The c23 capacitor. Adding extra connector will cause more resistance to that component.
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Re: 10S custom skate ESC: testers wanted!

Post by rodgah » Jul 14 2015 6:44pm

points taken....I am a noob when it comes to anything like that. It would be cool if it were able to be built by someone with some patience and simple tools....and easier to replace components.
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Re: 10S custom skate ESC: testers wanted!

Post by silviasol » Jul 14 2015 8:29pm

They are fairly easy to replace you just need a hot air station and a good soldering iron with small tip. Quality solder and flux is best also.
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Vanarian   10 kW

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Re: 10S custom skate ESC: testers wanted!

Post by Vanarian » Jul 15 2015 4:38am

silviasol wrote:They are fairly easy to replace you just need a hot air station and a good soldering iron with small tip. Quality solder and flux is best also.
Do you mind linking some solder iron and flux you would recommend?

On another topic I was recently wondering : when 2 VESC are plugged together and you want to update the firmware, do both VESC update when you update the "master" or do you have to do both separately? On same topic I forgot, is update available through Bluetooth ?
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vedder   100 W

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Re: 10S custom skate ESC: testers wanted!

Post by vedder » Jul 15 2015 7:22am

Vanarian wrote: On another topic I was recently wondering : when 2 VESC are plugged together and you want to update the firmware, do both VESC update when you update the "master" or do you have to do both separately? On same topic I forgot, is update available through Bluetooth ?
You can update both when they are connected over CAN-bus. When the CAN Fwd checkbox is checked and the id is set to the id (as configured in the app tab) of the other VESC, you can do firmware updates and configuration as it it would be connected directly. This also works over bluetooth, so you only have to connect the bluetooth module to one of the VESCs. I will make a video where I show that soon.
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Vanarian   10 kW

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Re: 10S custom skate ESC: testers wanted!

Post by Vanarian » Jul 15 2015 8:50am

vedder wrote:
Vanarian wrote: On another topic I was recently wondering : when 2 VESC are plugged together and you want to update the firmware, do both VESC update when you update the "master" or do you have to do both separately? On same topic I forgot, is update available through Bluetooth ?
You can update both when they are connected over CAN-bus. When the CAN Fwd checkbox is checked and the id is set to the id (as configured in the app tab) of the other VESC, you can do firmware updates and configuration as it it would be connected directly. This also works over bluetooth, so you only have to connect the bluetooth module to one of the VESCs. I will make a video where I show that soon.
Perfect!!
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lizard   100 mW

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Re: 10S custom skate ESC: testers wanted!

Post by lizard » Jul 15 2015 12:54pm

I have a question regarding the torque/current control. I read somewhere, that if the VESC is in current control mode, it will spin the wheels very fast when throttling just a little with wheels in the air because there is obviously only very low torque/current needed to do so.

Is there a way to stop this from happening? Or to make it spin up slower? Don't know about skateboard use, but for RC guys it's common practice to always power up with wheels in the air and giving a little throttle to see if everything works alright prior to running the car. In my case that probably means tires spinning with more than 9000 rpm after 0.5 seconds. Actually, I never dared to rev it up to fullspeed with wheels in the air because it starts to scare me already at around half throttle, so I'd rather not find out how fullspeed will be :)

BTW, the repaired VESC and my 1717 arrived, thanks again for the quick fixing. Somehow your solder joints look better than the ones I did :) Will hopefully test it on the weekend if weather and time permits.

Oh, and another thing: There were some people with fried VESCs after using them together via CAN bus, are there new discoveries about this and what could have been the cause? I'd like to try it in my twin 1717 RC car sometime. Changing settings via one ESC with bluetooth and smartphone is really cool...

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Re: 10S custom skate ESC: testers wanted!

Post by IanXV » Jul 15 2015 1:21pm

So I've got 2 VESCs from Jacob. Seem like they have the right Caps. But now one of them won't power on at all, I went through and checked as many points as I could find to see where the failure is(it seems like the U2 regulator might be the cause, the V in and ground are shorted) but I'm unsure it's worth replacing because I don't know if it fails and then goes full open or if it shuts down to keep other components from being damaged.

And now for some reason my other VESC has a solid yellow light and the wiiceiver is blinking but the motor won't spin up and the VESC won't connect to the BLDC tool.

If anyone has any tips to fix either of these VESCs that would be greatly appreciated as these are my only 2 :(

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Re: 10S custom skate ESC: testers wanted!

Post by Shep_pard » Jul 15 2015 3:45pm

Just wanted to show a good use of the VESC.
The DIY car alternator E-Bike!



Thanks Benjamin for all your work, without it I wound't been able to go 60 km/h down that road! The motor runs absolutely awesome!

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Re: 10S custom skate ESC: testers wanted!

Post by chuttney1 » Jul 15 2015 7:58pm

Cruzing Vedder's page because I ran into an "OpenOCD init Failed" issue with my stm32F4 discovery board to look for answer. Came across a comment made by "Alex" what I believe Inboard is planning to use Vedder's controller in their product.

Pic from their Facebook page.
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