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@sskaug i got tmotor f103 8000kv with f45 4 in 1 esc. Controlled via dshot.
Most of the time they need 3-4 seconds before spinning correctly, otherwise the esc is failing to initialise them and or turn them very very slowly and clogging or don't start at all and osscilate. I set startup power to max (150%), auto timing. Demag is default. Low rpm protection is on. Fw 32.7. any suggestions? Once fully started they don't have any problems. Same motors and configuration using a typhoon 32 they start no problem at all Inviato dal mio SM-G996B utilizzando Tapatalk |
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I have a quad with a Tekko32_F3_C 4in1 ESC. When 32.8 first came out, I upgraded. In the next dozen flights my front right motor burned up mid flight just cruising. Twice.
After that I downgraded to 32.7 and didn't have any further problems. When 32.8.0.1 came out, I figured I'd give it another chance. 8 flights later, my quad went down again with a toasted front right motor. Since the interface couldn't even tell the difference between 32.8.0.1 and 32.8.1.2 when I went to upgrade, I'll just go back to 32.7 until this is sorted out. I already have $120 worth of burned motors at $40 a pop. If one of the devs could please check out why this model of esc is burning up front right motors (arducopter) when on 32.8, it would be greatly appreciated. I have always had a test flight after the repairs and the motors are all cool, so it's not my settings. It only happens on 32.8. Thanks, KevinB |
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Hello, I've been trying the new 32.8.1.2 firmware on a Wraith ST with a weird application - I have a racing quad size (2208) gimbal motor wound with 27ohm phase resistance and ~180kV, and I want to swing a large diameter, slow prop on it. Every small ESC I've thrown at it has really struggled to commutate the motor, since they're expecting much higher currents and ERPM. The "Very High" demag compensation setting introduced in this firmware version made it possible to get this setup commutating properly without a hand-start! So I'm very pleased.
With the current settings the motor stutters on startup, but at 1300us servo signal and above it reliably gets kicked hard enough to pick up and start commutating, after which everything works well until the next time it has to start from a stand still. Edit: did some load testing, I can get 8-10g/W depending on prop, but with the current winding I'm limited to about 20W @ 6S supply. Hoping the motor is hooked up in delta and i can just swap it to star to pump that up. My current settings are attached. |
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Last edited by matty_pee; Oct 24, 2021 at 09:36 PM.
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I have 1 of 4in1 esc have lower rpm then other 3 esc, is it defeated ?
replaced motor and same result esc : Hobbywing micor xotor 60A 4in1 blheli32 firmware : 32.7 and 32.8 motor : emax eco II 2807 1300kv |
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Last edited by singlag; Oct 27, 2021 at 03:38 AM.
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How does regen / dampening light work?
I'm using a BHELI_32 ESC in an unconventional application and need a better understanding of a few topics:
* What exactly throttle maps to control wise (ex - PWM Duty cycle, target eRPM, etc) * Active braking / regen / damped mode * Difference between bi-directional and bi-directional soft * If bi-directional mode is on and we change throttle sign on a high inertial load, would regen occur until direction change (or would it at all)? For the first bullet, I am fairly sure throttle maps directly to PWM duty cycle, but wanted to double check. Assuming dshot, would 2047 be 100% duty-cycle and 48 be 0% (or 1500 when using bi-directional) and linear interpolation in-between? If that's correct, I have trouble understanding how the regen/dampened mode works. If throttle maps straight to PWM duty cycle, I would expect a negative duty cycle (ex - if bidirectional was active, a throttle value that crosses the mid-point) necessary to trigger complimentary commutation. But looking at the graph in this video indicates that something else is going on: https://youtu.be/q36JT1IakZM?t=153 It seems that even if our throttle stays of the same sign, a drop in throttle magnitude triggers a some logarithmic approach to a steady-state velocity. That almost suggests there's some velocity loop closure or some underlying PID trying to achieve a target eRPM instead of letting the system reach a steady-state naturally (the non-damped behavior). My suspicion is that throttle does map to PWM duty cycle and that damped light mode does something clever with the rate of change of a throttle command to apply some reverse torque. If that's true, we probably wouldn't continuously regen with a high inertial load or if something else was back-driving it. In which case these ESC's wouldn't be all that useful for energy recovery and damped light mode is primarily to assist low-interial/high-drag loads like propelleres to get to steady-state faster. Is that what's happpening? Thanks |
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Last edited by DrTarr; Oct 30, 2021 at 05:13 PM.
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Are you powering the ESC via VBAT with your 1wire setup? |
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