jxlee said:I have one quadrature encoder with A- A+ and B- B+ Signal, but my driver is a single-ended encoder channel?
Can i just connect either the A+ and B+ or A_ and B- signal to the single-ended encoder channel?
Please advise.
Thanks
Standard polarity signals consist of a “positive” level, pulse or edge in RS-422 input mode. (This
means the + input has a higher, more positive, voltage than the – input.) In single-ended logic-level
input mode, standard polarity consists of a “negative” level, pulse or edge. (This means the input is
at logic zero, about 0.7 volts or less.)
This definition of polarity is by convention. TTL signals have been historically “active low.” Many
sensors and opto-couplers are “active low.”
To connect a quadrature encoder to a single-ended channel, you will need to use a voltage divider circuit. This circuit will convert the differential signals from the encoder into single-ended signals that can be read by the channel.
You will need resistors and capacitors to build a voltage divider circuit. The values of these components will depend on the input and output impedance of your encoder and channel, as well as the desired voltage level.
To determine the values for the resistors and capacitors, you will need to consult the datasheets for your encoder and channel. Look for the input and output impedance values and use these to calculate the appropriate values for the voltage divider circuit.
Yes, there are a few other things to consider. You will need to pay attention to the wiring and placement of the components to minimize noise and interference. You may also need to add filtering or shielding to further reduce noise.
No, a voltage divider circuit is necessary to convert the differential signals from the encoder into single-ended signals that can be read by the channel. Trying to connect a quadrature encoder directly to a single-ended channel can result in inaccurate or unreliable readings.