Have you checked to see if any faults were thrown? Before turning off the CFOC2, reconnect it to the VESC_Tool, go to the terminal (lower left side), and type Fault and Faults
Try using a vesc tool version that matches your firmware. I think that will fix your issues.
https://drive.google.com/file/d/1GDVLFcPFf0MpjXtSnRGoMyiQljMRAtGX/view
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Hello,
Thank you for your replies.
I tried both, since it seems that I have the 5.1 FW version I used the 2.06 Vesc tool version. sadly without success.
And for when I type on the terminal fault or faults I get :
“No faults registered since startup”
But When I type other things I get normal replies.
What might the small noise be ? It’s sound like a relay.
Could it be a safety flag that triggers and shuts down the device ?
Thank you,
Yeah this could very well be what was wrong. Making sure the DRV is soldered correctly is one of the first things to check.
The performance you are getting now seems more normal but still sounds like something could be tuned or improved.
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Shaman,
I’m helping a buddy build one of these…
We’re probably going to use a 6384 sensored outrunner. I understand the CFOC2 can take 12S - but not sure how many watts it can handle. We’ll probably setup water cooling for it.
If the CFOC2 can’t handle the watts, I have to decide whether to go with two motors and 2 CFOC2’s or go with the Serious FOCer. Your advice would be greatly appreciated. Thanks!
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Interesting approach to a hydro foil!
watt wattage is needed?
The Little FOCer can do 5kW peak if that something of interest.
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Yeah. He and I kite-foil during the windy season, and this is the way to get a bit of water therapy during the off-season.
Good question. The motor we’re looking at claims it’s good for 4600 watts. You think a CFOC2 could safely do that much? Just thinking outloud… 12S would put us at about 48V, so that would mean about 96A continuous from the batteries. Seems high to me.
The other options I’m thinking are to use the Serious FOCer, or gang two of these motors on a single shaft and drive them with two CFOC2’s connected by CAN bus. That’s effectively what I’m doing with my mountain board.
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Sorry to be a bother again @shaman but real world testing revealed the fault consistently above 45A…gonna do the v1 resistor mod, but this time I’m positive everything is soldered as good as it can be. Running out of ideas…
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Today i flashed the new beta firmware (5.03) to the mountainboard and the onewheel. ASS seems not to be working well and when switching to sensorless its doing the same thing (HALL mode on the onewheel works fine):
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ASS seems to have a dependency on motors with temp sensors and other factors that may or may not have been disclosed by Trampa. I’ll be experimenting with ASS on my own very soon
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Well regardless of what the motor can do, what wattage is actually required? So a metr log would give good data on what kind of power is actually needed.
The little FOCer can 5kW peak and 3kW continuous with good cooling. This might do the trick. Otherwise you’ll have to wait for the Big(formerly serious) FOCer.
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Yeah it’s gonna be hard for to help without my own hands on the situation. The CFOC2 is capable of 75A operation at least in my own experiences. Are you using the recommended Mosfets from the BOM?
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Unfortunately we won’t know until we build it. It’s easy enough to do the calcs for the load while foiling, but it takes quite a bit more power to get up onto foil; but we’re not sure how much more. Once we get it working, I’ll be happy to log current and post results.
Are you using the recommended Mosfets from the BOM?
We haven’t built this yet. I have a couple of spare CFOC2 1.0’s I can loan him until he gets his. Mine are using the standard MOSFETs from the BOM. When we build his we would use the same unless you suggest something else.
Thanks again.
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Mine are CFOC2’s. Is that what you mean, or are you talking about the Little FOCer from the other thread?
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Is that 75A battery or motor?
Thanks.
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I got NCEP60T18s instead of T20s…Seems like a worse version with higher Rds and higher gate threshold voltage, but I don’t know if it would make a difference (please, please, please say yes)
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Yes. The Little FOCer from the other thread
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Peak motor
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The NCEP60T18 has a lower minimum gate threshold voltage which is what I look at. Lower is worse.
With your motor and only 10s battery, I would imagine 75A to not be a problem to achieve. Something is going on here. Did you actually calibrate HFI? What firmware version are you using? What procedure do you use to run motor detection? you can PM me the VESC tool settings you use to let me see if anything seems out of place.
Just wondering if anyone has had any success or non-success with the cfoc2 and the latest beta release.