On a flying shear or cut-off saw system, the encoder that measures the speed of the material fed is very important. To select an encoder, what is the minimum velocity resolution required?
I looked at a older system with a newer motion controller that is working OK but product length is a little to inconsistent(Spec. is +/- 1/8") and some odd things are happening (Cut length does not match set point and cut length is different depending on which direction the saw moves). The line speed can be set from two inch/sec to 16 inch/sec.
The existing line encoder provides 398.5 pulses per inch of travel resulting in a velocity resolution of 1.25inch/sec. And the saw carriage encoder has a velocity resolution of 0.58 inch/sec.
By what factor should the encoder resolution be improved to get a good performing machine?
I looked at a older system with a newer motion controller that is working OK but product length is a little to inconsistent(Spec. is +/- 1/8") and some odd things are happening (Cut length does not match set point and cut length is different depending on which direction the saw moves). The line speed can be set from two inch/sec to 16 inch/sec.
The existing line encoder provides 398.5 pulses per inch of travel resulting in a velocity resolution of 1.25inch/sec. And the saw carriage encoder has a velocity resolution of 0.58 inch/sec.
By what factor should the encoder resolution be improved to get a good performing machine?