Hi
Im looking into an application where a shaft is rotating in a lathe (slowly) and i want to design a controller that will allow the required number of revs to be entered and the controller stops the lathe when they have been completed.
I can do the controller side easily enough but i havent much expereince with shaft encoders. What should i be looking for?
If i have 6 inputs on my controller say, should i be looking for an encoder that produces a 4 or 5 or 6 bit grey code/binary word that i can use in my controller? to compare?
My original simple idea was to have a point on the lathe chuck that a sensor looks for and pulses the controller eac time it passes but this means the lathe has to start with the point under the sensor at the start of the cycle.
Im hoping that with an encoder i can check the parallel input word at start up and increment a counter each time the same code is encountered (each full revolution) meaning the counter can start when any point on the shaft is encountered.
Any ideas? am i making sense?
justn_t
Im looking into an application where a shaft is rotating in a lathe (slowly) and i want to design a controller that will allow the required number of revs to be entered and the controller stops the lathe when they have been completed.
I can do the controller side easily enough but i havent much expereince with shaft encoders. What should i be looking for?
If i have 6 inputs on my controller say, should i be looking for an encoder that produces a 4 or 5 or 6 bit grey code/binary word that i can use in my controller? to compare?
My original simple idea was to have a point on the lathe chuck that a sensor looks for and pulses the controller eac time it passes but this means the lathe has to start with the point under the sensor at the start of the cycle.
Im hoping that with an encoder i can check the parallel input word at start up and increment a counter each time the same code is encountered (each full revolution) meaning the counter can start when any point on the shaft is encountered.
Any ideas? am i making sense?
justn_t