Rob, >> A lot of my programs consist of 3D curves built up out of small lines and even with a G64 P0.1 (or larger in mm) the system never reaches the programed feed rate and the CPU load reaches of up to 95%. <<
Just how short are your curves and when you say "small lines", do you mean G1 or G2/G3 moves? If using G1 moves with very short vectors you can be velocity limited based on the length of the vectors. See section 2.1.4 of the User's Manual. I have excerpted the important part below. <quote> Make sure moves are "long enough" to suit your machine/material. Principally because of the rule that "the machine will never move at such a speed that it cannot come to a complete stop at the end of the current movement", there is a minimum movement length that will allow the machine to keep up a requested feed rate with a given acceleration setting. The acceleration and deceleration phase each use half the inifile MAX_ACCELERATION. In a blend that is an exact reversal, this causes the total axis acceleration to equal the inifile MAX_ACCELERATION. In other cases, the actual machine acceleration is somewhat less than the inifile acceleration To keep up feed rate, the move must be longer than the distance it takes to accelerate from 0 to the desired feed rate and then stop again. </quote> BTW, I am using the hostmot2 drivers for both the 5i20 and the 7i43. Kudos primarily to Sebastian for doing a great job on those drivers. You might want to check out the 7i43 which connects to the parallel port and is significantly cheaper than the 5i20. Regards, Eric ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
