Hi Martec - Please explain what you mean by adaptive jerk control? By nature all motion control in machines is "adaptive" there has to be some look ahead done and some change (adaption) of motion (path, velocity or accel) to make it smoother yet maintain the set path tolerance. Peter
image summary
ideas - describes in words what is happening in many controllers
adaptive - shows a typical calculation flow chart
jerk limit - shows the screen for Buildbotics path jerk limit setting
centripetal accel - shows Buildbotics screen for setting the centripetal accel which they call junction accel. Not sure why they call it that, I have asked Doug about that, waiting for a comment...
Buildbotics do comment that centripetal accel can be dominate and override the path accel (tangential accel). As centripetal (radial) accel is V(squared)/r the velocity can dominate or as R is the divisor if it is small it can create large accels. The vector sum of the tangent and radial accels has to be calculated and limited to provide smooth motion ie limit inertial forces. This is done by smoothing the path within the tolerance to "control" the accels and jerk.... its not simple math!!
Some advanced systems don't just look ahead and adjust once they run forward and back through the path smoothing several times. This maybe what you are calling adaptive? Peter
ARggghhhh!! Buildbotics have got back to me and they are out of stock due to the microprocessor shortage and don't know when the next run will be available! bummer!! I'll be patient and look at the 3D printer controllers a bit more...