Rudy du Preez pravi: > I have a general question about the throughput of EMC2 and what determines > it. I friend is using nurb modeling to describe the shapes that he has to > mill in soft material. So far he has had disappointing results using EMC2 in > that the processing of the large gcode files with many short vectors and the > resulting cutting speed is too low. For most cutting moves the programmed > speed of the axes is not reached in these applications. Jogging speeds on > the machine is fine. Where does the problem lie? > > In playing with parameters such as base_thread, we found that these have > some influence on the troughput and cutting speed. The processing power and > latency of the PC also comes into play. It seems that careful tuning and > balancing of some parameters is required. The problem is to know which ones > will improve the situation best. The steppers are currently driven via the > parallel ports. A MESA 5i20 card is planned to replace this. > > Has anybody been working on the limited throughput situation? > > Rudy > > > Did you use G64? If not then machine wil accelerate/decelerate in each segment! If you have fast jog that doesn't be equal to fast cut speed. If you have bad acceleration for example to accelerate to max speed when move 5mm then all segments shorter than 10mm can't use max speed of machine. If you use G64 then machine will try to keep speed up but in that case it's not possible to trace exact path. If I corectly understand the EMC have one line lok ahead buffer. - Somewhere in doc's is statment that if emc is paused will decelerate at least in next line of gcode. So for me that's mean that if consequent lines is shorter tnan 5mm (in this example) then machine won't got max speed.
Slavko ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
