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| PIC Programing / Design Discuss programing of PIC chips here and design of electronics using PIC chips. |
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#1
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Im stuck and need some help! ive got some servo controllers built using the Picservo-sc chips, however I am having a hard time understanding how to make the servo encoder connecections. the chip only calls for encoder connections A and B. 5+ Gnd and Index. The units I would like to make work have A channel B channel and A (with overscore) B (With Overscore), Is this channel negative or common?, I also have i (index pulse I assume) and a T wire (unknown) its an encoder on a electrocraft motor. I just dont know where to connect the following. _ _ A B i and T(could be a capital I) wires to my pic servo sc chip, or explain what the different symbols are (wave inverted I think, but that doesnt help me) hope someone else here has been here before. hellllllp TIA |
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#2
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| The channels with the over score or NOT are the complement or inverse of the channel which is not overscored, this is a differential encoder and is made this way to implement noise cancellation, it uses a differential driver IC. If you only want a A & B channel you can ignore the /A & /B. The I & /I are the index or marker , one per rev pulse Al.
__________________ “Logic will get you from A to B. Imagination will take you everywhere.” Albert E. (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |
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#3
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Thanks Al, After writing that I hooked allencoder wires up to my scope and tested each wire and found out exactly the same thing. (guess I should have started with that) Its not a T after all just an I for index with an overscore or inverted sign, on a very poorly printed spec sheet Just so I understand this correctly and possibly for others, I will just omit the inverted A B and i, and leave the wires disconnected. should I experiment with noise cancellation, this is where the others would come in handy. Thanks yet again for your valuable input, I appreciate all the time you spend in these forums. Gurvy. |
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#4
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| Use A,B&I If you want to make use of the differential feature, there are differential reciever IC's this way you use all six connections and obtain the noise cancellation feature. Al.
__________________ “Logic will get you from A to B. Imagination will take you everywhere.” Albert E. (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |
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