Given the acceleration profile is trapezoidal the acceleration goes (near) instantly from 0 mm/s/s to 300 mm/s/s and then acceleration is constant until ~ the feedrate is achieved and then the axis acceleration decelerates to 0 m/s/s and maintains the feedrate.

With a stepper if you know the step size and the acceleration you can quantify the jolt that the machine will be creating and its components experiencing. Jerk / Jolt is defined as units / s / s / s (units/s^3) Rmat wrote:Im at 400steps/mm, so 0.0025mm/step.ДЄsk yourself 'do you need to have a step resolution of 0.0025mm?'Дont shoot messanger. TAPER=45deg - ZMIN=-1.7 - chamfer mill)Д«est regards, Matej rmat Posts: 15 Joined: Thu 12:22 pm Im pasting part of the, code, if anybody is willing to look at it I would highly appriciate it. I would already need this machine cutting, so Im willing to try just about anything. Im probably doing something wrong, but cannot figure it out. Since I have had some expirience with motion controllers and also MACH, I cannot understand what is the deal here. Machine runs very 'jerky' to say the least, and I have tried everything with messing with parameters on CV.ДЄlso, Ive read that uccnc has problems with arcs, Ive posted files with poits only, and maybe just a little improvement, but still no luck getting smooth motion. So up to now everything as planned, but since my first cut, nothing but dissapointment. Machine is router, but build as more as a gantry mill, so very stiff costruction, point of making was aimed especially at high speed machining. In short, Im using Fusion 360 to generate Gcode and I have servos on my machine. I have the controller for two weeks and now that I figured it out and set up my new machine up, so everything runs smooth, it was time to cut some metal.

Erratic movements grbl controller