Jon Elson wrote: >Jack Ensor wrote: > > >>How is the COMP_FILE = file.extension used in the Axis mode of >>operation? I tried creating a table (comp.fil) as follows to see the >>results and get an idea of how it works: >> >>-13.0000 -13.000 -13.0000 >>-5.0000 -4.0000 -4.0000 >>0.0000 0.0000 0.0000 >> >> >>The appropriate portion of the ini file: >>BACKLASH = 0.0000 >>COMP_FILE = comp.fil >>COMP_FILE_TYPE = 0 >>HOME_OFFSET = -13.2 >>HOME_SEARCH_VEL = -1.0 >>HOME_LATCH_VEL = 0.05 >>HOME_USE_INDEX = NO >>HOME_IGNORE_LIMITS = YES >>HOME_SEQUENCE = 1 >> >>After homing the axis under test I went to the MDI mode I entered g0 x >>-5.0 and expected to get motion to the position of -4.00 since I had >>defined that in the COMP_FILE table. However the final position went to >>5.00 indicating to me that the table was ignored. >> >> >On the other hand, EMC's screen display should INDICATE it is at >5.00 no matter what is in the comp table. If you constructed >the comp table correctly, then you should MEASURE that the >machine is in a different position. > ] I use the DRO mounted on the table to read table position. True, EMC indicated -5.0 as it should but I expected to see the table DRO to indicate -4.0. But it really went to -5.0 on the DRO.
> You don't make it clear >above whether your 5.00 is from the screen or a measured position. > >Jon > > I assummed that using my table mounted DRO I would be able to calibrate the system and use the COMP_FILE to correct for my backlash which varies according to table position. I was wondering if Emc interpolated for the positions between values listed in the table, but at this point it seems that COMP_FILE isn't working even for values listed in the table. Jack Ensor ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
