vitviggs

Thanks for your time! Imagine that on the film there is a mark at every 200 mm and that`s the point where I need to cut; when machine is preparing to cut is slowing down the speed at about 100-300 mm/s(varies);to make my blade cut in a fix point(at the mark) I need to know the speed enveloping an entire lenght at at least 20 ms sample (for accuracy); in between two marks(photoeye`s resets occurs at about 0.5 -1.5 s repetition according to the speed) I need samplings every 20 ms of my film_speed tag which then goes in another formula; so , the reset of encoder pulses to zero wouldn`t help in calculation, this period being much larger than the samples I need in speed calculation (between two resets the speed can take a dramatic change and the cutting might be "ordered" at any time inside them); thanks again!

Hello! I would like someone to advise me how to write a function code which to calculate the speed (in mm/s) of a moving film ,from an encoder position ; in detail, I need to cut the film at a certain position and its speed is necessary in a computing formula for cutter blade action; the speed is variable (due to reel brakes behaviour in low speed), and I would like to calculate the speed at every 20 ms , and to update this value in general cutting action formula; one encoder pulse is one mm traveling of the film; the problem is that I need speed samples at every 20 ms; the encoder position increases from 0 to one certain number when is reset back to zero by a photoeye ; again, as the speed is oscilating i wanna know at every 20 ms the film speed; P.S. I work in RSLogix 5000 thank you! with regards!