bud@umiami.miami.edu (07/14/90)
The following is a list of companies that sell optical encoders and resolvers. This list is by no means complete, but it contains a number of companies that sell various types of encoders. NOTICE: This information is provided "as-is" -- every effort has been made to proivde correct information, but I cannot be held liable for typos or misinformation. -------------------------------------------------------------------------- Hewlett Packard (800) 752-0900 -- optical encoders and digital potentiometers - not free spinning good CPR rating -- housings for lab environment Renco Encoders (800) 888-5007 -- optical encoders -- medium to large size -- industrial housing some available with shaft and bearings Vernitech (516) 586-5100 -- optical encoders -- medium to large size -- industrial housing available with shaft and bearings -- up to 600 CPR BEI Motion Systems (805) 968-0782 -- optical encoders -- medium to large size -- industrial housing Balluff (800) 543-8390 -- optical encoders -- relatively large size -- very rugged housing high CPR rating -- very friendly people! Encoder Products Corp. (208) 263-8541 -- small (1.5" x 1.5") sizes and larger -- somewhat expensive Bourns (801) 782-2070 -- very small sizes available (under 1" x 1") -- good prices 256 CPR max, higher under development -- many different housings -------------------------------------------------------------------------- Notes: Most companies will manufacture custom encoder wheels to a user- specified CPR (counts per revolution) rating. Most encoders offer two sensor quadrature output, allowing bi-directional sensing. Resolution can usually be increased by phase analysis of the output signals, yielding 2x or 4x the original resolution.