Yet Another Gantry Config... I am building a gantry with two motors on the y axis (X, Y1, Y2, Z). It has servo motors driven from 4 Gecko 320X drivers. The Geckos take the encoder A,B pulses (but not Index) from the encoders and close the loop on the servos. I am using basic parallel port pins for step and direction for each axis from EMC. I am planning to wire the Index pulse back into a parallel port pin to try to use for homing. I have the Low-cost THC from CandCNC that I want to use for the plasma torch and so I had started with the plasma-thc configs. I have read what I could find on gantry configs on the mailing list, the forum, and wiki, but still have questions and issues.
I had it set up using Gantrykins (as in plasma-thc configs) and was having problems getting anything to move properly, seemed to be an acceleration issue and the motors were just faulting continuously, On the IRC Chris Radek suggested there was no advantage to using Gantrykins and that it may have some problems and so I changed things to Trivkins. Doing that I was able to get X moving fine, and am now trying to get the two Y motors set up to operate together. The plan was to have individual home and limit switches on all joints (all 4 of them) so I can square up the gantry automatically. Can I do this with Trivkins? Is it true there are problems using Gantrykins and should I avoid it? I assume that if I want to have two limit/home switches on Y then I need to have two different step/direction signals for those so I can control them independently, right? Are there HAL and INI configs that are better than the examples that folks have used to get this working? -Tom ------------------------------------------------------------------------------ What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
