Just when you transition around 0RPM. The moment you apply positive throttle it will try to track the rotor. Sometimes you will hear multiple bleeps, sometimes only a single bleep.
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What about motors where HFI does not work good? I assume ASS also wont work with them.
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I’m not sure if lack of response is always motor linked. It can also be ESC linked. The typical outrunner we use in esk8 should be salient enough for sensorless tracking at slow speeds. We can even get it to work with low pole count inrunners.
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I can’t wait to hear other people’s thoughts on all this ass stuff… Or the beta firmware improvements on fully compatible hardware.
I also want to know if it’s just placebo, or if it’s my gearing ratio in this setup… But the beta firmware on my 60D+ is torquey as hell at almost no speed. I am running hall sensors, not HFI start. Does it make a difference? The low speed FOC improvements should be across the board right? … Is it that having phase filters allow you to take full advantage of the low speed FOC improvements? I ask because I am running beta firmware on my other setups and although performance is smooth, it doesn’t feel anything like full torque from zero to low speed.
Also, back to OPs question… Was it ever adequately answered how exactly you tune ASS? Is it simply just setting up HFI and enabling HFI start? What if halls work fine, full torque from zero speed-still a thing? I feel like I need to dig into GitHub PRs.
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Well, you don’t tune it, you simply activate it.
And the new advanced sensorless startup is full torque capable, so your Hall probes don’t need to be used for a long time. Have a look at the transition RPM. Also the hall sensor implementation has seen improvements as far as I know. Overall torque at slow speeds is better now.
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I tried to setup HFI Start (ASS) with latest 5.3 VESC firmware yesterday on Focbox UNITY.
Couldn’t get it to work. Multiple HFI bleeps and stuttering, can not move from standstill. I guess that answers the question about non-supported hardware, at least for Focbox UNITY.
Regular HFI works awesome by the way. From my experience it works as good as sensors. The only difference is the sound of motors from standstill which I actually like.
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Unity and clones of that unit do not support Advanced Sensorless Startup. However, the sensorless startup is now also better for non A.S.S capable ESCs. So there is also a benefit for everyone using older HW.
HFI is already quite a nice way to launch from a full stop, but A.S.S is way stronger torque wise and even works on steep hills where HFI sometimes struggles a bit.
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