02-26-2012 10:47 PM
i'm begin labview
i made a project dc servo motor control position control .
i want to connect encoder to umi box for measure signal from encoder .
i attempt to test encoder follow MAX help for motion.nothing signal.
i attached code.is it code wrong?
how i do it?
help me please
thank you for any help
02-27-2012 04:28 AM
First, it would be helpful to indicate the complete type of encoder, there are several different types of HEDS9x01-encoders. Also, a drawing of the encoder dimensions is not very helpful when connecting it electrically...
This being said, you only need an index channel (output) if you want to run a "find index" routine, this is sometimes used for more precise positioning of a system to its reference position. So it is possible to use encoders which have A and B channel. When connecting such an encoder to the UMI box, it does not matter whether the outputs are differential outputs (RS485 level compatible) or plain TTL level outputs, the UMI box accepts both without any modifications.
02-28-2012 01:26 AM
Sorry for my mistake, we have a different version of the UMI box which supports both single-ended and differential encoder output.
Again, it would be helpful to place a correct link to the datasheet of your specific encoder.
If your encoder has single-ended outputs only you have to use external circuits to convert them to differential signals.