Best way for feedback with RC ESC spindle?
- CptanPanic
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John
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Something like thisSome folks build an encoder using opto sensors and a disk with slots on it.
www.linuxcnc.org/index.php/english/compo...imit=6&start=6#14832
with an opto switch circuit like this
www.linuxcnc.org/index.php/english/compo...id=26&id=17960#18093
regards
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- CptanPanic
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Yes, if you know how to build a circuit to do that and can eliminate other interference.With a brushless motor, shouldn't you be able to get rpm from sensing pulses on a motor line?
You just need to be able to sense the 'blip' as each pole rotates and then divide by number of poles to get RPM.
Afraid I don't know how practically you do it though.
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- CptanPanic
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The testing bit will be whether your pulses exceed the capacity of the encoder to register them.
Some of that will be dependent upon the speed of the thread.
We don't generally have spindles which exceed say 3,000 rpm on CNC machines, let alone over 14,000!
What speed are you expecting to run it at?
Hopefully one of the electronics boffins is monitoring this and can definitively advise
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Yes, if you know how to build a circuit to do that and can eliminate other interference.With a brushless motor, shouldn't you be able to get rpm from sensing pulses on a motor line?
If there are Hall sensors, then it is just a matter of using one of them twice.
<thinks> bldc.comp could very easily have an rpm pin added.
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- kbailey204
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logicnc.com/rcnc.html
EDIT: NVM. I thought that controller was closed loop. I think it is only for open loop control.
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