Editing Feedback devices
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Resolver is an analog technology based on rotary transformer that can provide absolute position (single turn absolute, for multiturn absolute position zeroing is still needed). Resolvers are good for harsh conditions but they don't provide as high precision feedback data as encoders. | Resolver is an analog technology based on rotary transformer that can provide absolute position (single turn absolute, for multiturn absolute position zeroing is still needed). Resolvers are good for harsh conditions but they don't provide as high precision feedback data as encoders. | ||
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===Tachometer=== | ===Tachometer=== | ||
Tachometer is a small DC generator that outputs DC voltage proportional to rotation speed. It can be used as velocity feedback device but not as position sensor. Tachometers are often seen in dual-loop configurations combined with position sensor. | Tachometer is a small DC generator that outputs DC voltage proportional to rotation speed. It can be used as velocity feedback device but not as position sensor. Tachometers are often seen in dual-loop configurations combined with position sensor. | ||
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*[[Resolution of motors]] | *[[Resolution of motors]] | ||
*Extensive article about different types of feedback devices: http://www.optoresolver.com/help/glossary.htm | *Extensive article about different types of feedback devices: http://www.optoresolver.com/help/glossary.htm | ||
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