On Oct 28, 2011, at 9:37 AM, Viesturs Lācis wrote: > Ok, got it. If You do not want to disable Axis (which I do not see a > reason for keeping it enabled, when servo drives are homing it), then > I will agree with Andy's suggestion of using mux2 components. > > If I understand correctly, Your intended homing procedure is allowing > servo drives move joints with considerably decreased torque in motors > machine hits the end of travel. Is that correct?
Yes, correct. They move at a reduced torque until a specified ferror is reached and then search for index (optionally) and then move a specified number of counts. > I am sure that even with greatly reduced torque in motors this is > totally wrong approach, because You still are breaking Your machine. I > still think that inductive proximity switch (or any other type of > limit switch) for each joint is the way > to go. I hope to not break the machine, and we haven't so far ;-) Many aspects of the system we have are not necessarily done the way others have done them. On the other hand we don't have anything that out of the ordinary or anything dangerous. How many people run machines with NO home (OR limit switches)? Many (most?), is the answer to the rhetorical question. Not sure it is the "wrong approach", which implies there is only one right way to do something. It is simply a different approach that you may not prefer :-) > Ok, let me know, when You will be working in that and I will post the > files in my website. Cool, thanks I will let you know. > What is wrong with homing a gantry machine in released EMC2 versions? > My waterjet machine is a gantry machine and it worked fine with > gantrykins. I retrofitted a gantry-style plasma cutting machine in > summer and it also is happy with gantrykins. I don't know if there is a problem. I too am using gantrykins. I have tried to find information on how to home the 2-joint/1-axis gantry and I haven't been very successful. How does EMC home a dual joint axis? Which encoder does it use? Both? Can I have it use only one? Can I specify which one? Can I be sure it will appropriately move the other motor together with the one on which it is finding the index? Hence my posts here... Tom ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Cisco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
