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From: gcarlisl@cln.etc.bc.ca (Gale Carlisle)
Subject: Position Feedback Devices
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Message-ID: <1995Apr29.033518.9617@news.etc.bc.ca>
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Reply-To: gcarlisl@cln.etc.bc.ca (Gale Carlisle)
Organization: The Education Technology Centre of British Columbia. (Canada)
Date: Sat, 29 Apr 1995 03:35:18 GMT
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	I have been collecting info on motion control devices, such as 
	electrical and mechanical parts. The following info may be of
	some use.

	An incremental encoder generates a pulse for a given increment
	 of shaft rotation (rotary encoder) or a pulse fo a given linear
	distance travelled (linear encoder). One supplier is US DIGITAL
	(800) 736-0194 with optical encoders and microprocessor interface
	chips available. Quantity 1 phurchases are available.

	Resolvers are a type of Absolute encoder and are basically a
	rotating transformer with high resolution, up to 65,500 counts
	per revolution. These resolvers need a converter to interface to
	microprocessor and are available from different suppliers. A
	cheap supplier of resolvers is FAIR RADIO SALES CO. (419)223-2196
	A supplier of resolver(syncro) convertors is COMPUTER CONVERSIONS
	CORP (516)261-3300. 

	I have a large amount of info available and would be pleased to
	pass it along to the needy.

	Please note that I am not a Specialist in this field, only a very
	interested hobbyist.

					Thanks,  Steve Carlisle
