absolute encoder adjustment

hi

this a network in the flying saws program,it is related to absolute encoder adjustment  of infeed saw,am i right? if yes please explain me why or when we need absolute encoder adjustment ,and what is mean? give me applicable example ( i have read manuals but didnt understand exactly )

thx

Hello,

the "absolute encoder adjustment" is a kind of homing.

You need the homing, because you need to know inside of your program the actual position of your flying saw. For example you have a sensor somewhere at the middle of a linear axis. You know exactly the real position of this sensor, for example in the middle of the linear axis which is 10 m long.

So the sensor would be at 5 m. If your flying saw axis has an absolute encoder, you could jog to this sensor, stop there and then do the "absolute" encoder adjustment. Then the actual position inside of your program is exactly at 5 m. The advantage is that you can know do an absolute positioning to any other mechanical position. Especially for flying saws it is required to do some kind of homing, because you want to start somewhere at the left of your linear axis, then synchronize to the material velocity and then move back to the start position. In case you don't know the real position of your flying saw, you cannot do this.

But be patient, as the name already says, you will need an absolute encoder for it, please look at the type shield of the motor / encoder if it is one. In case you have an incremental encoder, you cannot use the absolute encoder adjustment, then you have to do some other kind of homing.  

The big advantage of absolute encoder adjustments are that in case of an multiturn absolute encoder, the absolute position of your axis is saved remanently, that means even after a power off/on the actual position is still known inside of the drive. Incremental encoders have to be homed after a power off/on again.

Hope that helps!