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g0ultimaker

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  1. Hello, Some questions about jerk. I think i have got the meaning of it all right but do i also apply it correctly? Jerk speed is the instantaneous change of speed that can be made. If the jerk speed exceeds the allowable jerk speed (as in example 1 ) the speed needs to be slowed to satisfy the equation. In this situation a direction change of 30 degrees is made, a nominal speed of 60mm/s is desired but not feasible (see figure below ) exceeds jerk (20) The nozzle needs to be slowed down to 38.64 mm/s if i got my maths right and the trapezoid (of the nozzle?) should look like the fi
  2. Hello, I’m doing some research on Cura with my Ultimaker2 momentarily on how it calculates the amount of extrudate, E-values. I saw a topic on extrudable.me about how to calculate the difference between the expected volume and the extruded volume. http://www.extrudable.me/2013/11/03/slic3r-strange-defaults-causing-qu-bd-woes/ But if a do so the expected and extruded volumes don’t match up (see figure). What am I doing wrong? The g-code is some lines from: UM2 - Extrusion Test - NoRet - 3-10mm3.gcode With I belief a width of 0,4 mm (nozzle size) and a layer height of 0,25mm. My
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