On Sat, Sep 4, 2010 at 7:01 AM, Viesturs Lācis <viesturs.la...@gmail.com>wrote:
> Hello! > > I am asking this question here for the 3rd time and I hope that > finally someone will answer: > > EMC2 is switching from world mode to joint mode, if I go from "manual > control" tab to "MDI" tab. I have EMC 2.4.3.1 version on Lucid, and > unfortunately I do not know, how exactly I can replicate this error, > because usually, when I go to MDI tab, EMC stays in world mode. > > Problem is that I have a gantry machine and, this error is breaking > the machine, when I try to jog. > > What can I do about it? What information should I provide? > Thank You in advance! > > Viesturs > > Viesturs, I have not done this so my answer is theoretical not empirical. My approach would be as follows: set up X1 as a normal axis homing with the index pulse on the X encoder set up X2 as U (in the .ini file) using the encoder feedback from X1 as the movement commands for U (X2). This would cause U (X2) to be a slave to X1. the U axis would also home from the U axis encoder's index pulse I would match the drive system (motors and amps) for both gantry drives and tune them exactly the same. I don't know how much alignment error is permissible in your setup ie - how much X position error is allowed before machine damage - surely there is some I would set up home sequence to home both X and U at the same time. I would set up both home switches to trip as close to the same time as possible with the goal of homing U first. I would adjust each encoder so the index pulse is in the correct radial location for X and U to get your timing correct and minimize axis misalignment. I would use home offset on U to do the alignment adjustment as any motion of X would drive U. It would be possible to use hal to disable homing on X until U is homed to ensure U homes first. This would probably cause the most misalignment and stress on the machine but with the correct encoder adjustment and home switch adjustment this could be greatly minimized. connecting U (X2) as a slave to X1 would cause U to move any time X moved without regard to modes (I think) hope this helps thanks Stuart -- cuatro centavos :) ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
