On 09/23/2012 03:57 PM, andy pugh wrote: > Indeed, using the actual Hall sensors is much better, I was just > saying that if the motor does not provide the signals then it is not > necessarily a complete show-stopper. Remembering an article in Machine Design about the CUI AMT303 commutating encoder made it seem like a good choice for adding U/V/W signals to a BLDC motor that doesn't have hall sensors until I saw the price. Digi-key has them for nearly $100. A bit too high, but these are really nice devices. To align them with your motor, you just energize one phase with + volts, another phase with - volts, and leave the third disconnected; then toggle the Zero Position pin, and it sets the commutation angle to the motor.
It's a nice technology, but since a similar (but slower) version is used in the digital callipers that Harbor Freight makes available for $12 with a coupon, I'd say the price is a little out of range. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
