> From: Les Newell [mailto:les.new...@fastmail.co.uk] > > I'm going to guess that low-level I/O error is a general > > _Following_Error_Joint_2_? > > No. It is a different error. I can't remember the exact wording but I > have seen it before. > > The following error message is correct. With steppers you have two > acceleration settings. There is the joint acceleration which is used by > the trajectory planner and the stepgen acceleration. STEPGEN_MAXACCEL is > used to simulate the physical limits of the stepper and it's load. It's > a simulated equivalent to to a servo motor running out of torque. If the > trajectory planner commands a higher acceleration than STEPGEN_MAXACCEL > the stepgen will not be able to keep up and you get a following error in > exactly the same way you would on a servo system that ran out of torque. > > Les That doesn't explain why, if STEPGEN _MAXACCEL is set to 125% of MAX_ACCELERATION that the trajectory planner or Stepgen tries to use a number larger than that.
It's like saying I know you have a 1 gallon pail but because I have 1 gallon in my pail I'm going to pour it into yours. Too bad it overflows when I pour two of my pails into one of yours. You should have had a 2 gallon pail. What the heck is the point of a parameter like STEPGEN_MAXACCEL or MAX_ACCELRATION if it can be broken so easily. Just confused here. John _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
