Hey guys. I just got my cnc mill moving now but I have a couple of questions about step timings.
My servo drives and Linuxcnc step setup are set to move 0.001 mm per pulse. And I want to move at a max table speed of 12000mm/min. So that is a max pulse of 12,000,000 pulses per min or 200,000 pulses per second. Now the smallest pulse length I can use after doing a bit of testing I think is 1000 ns and the step space is 200ns. I can move the table at max speed but the Stepgen PID errors out. And table tries to go back to the start point all the time. (I played with the ini values) So the servos seem able to read the pulses it is just the linuxcnc stuff that doesn't work. Do you guys know what I need to change? One approach is just to reduce the accuracy/number of pulses per mm. But that was kind of the point of the Mesa cards eg (High speed stepping) And I have 17 bit encoders. (131072 pulses per rev encoders). It seems such a shame to loose all that accuracy! Anyway any ideas would be appreciated. And I'll make some videos and send a reply posting them. Regards Andrew _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
