Hi John >> On the plotter this problem is solved in software. After replacing the >> encoder a calibration routine prints thin lines and the plotter scans >> back these lines and obviously calculates the date need to linearise the >> encoder readout in software. > > That sounds difficult if the only motion system you have is the "faulty" > one - the ultimate "bootstrap".
Yes, sounds difficult, I thought about this problem, too. The plotter usese this encoder to controll the paper feed. Not an easy task, a non-linearity would lead to horizontal strips in the print. My guess is that the plotter utilises the fact that each print head has a few dozens nozzles and that these are equally spaced. So all it has to do is print a line using the last nozzle, move the paper, so that nozzle one is now on same position and continue the line. If the does not show any discontinuity you know that the movement was correct, if not you need to adjust by software. This has to be repeated for various positions of the encoder and for various distances. See you Flo ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
