divide only when required

7 years ago · 65d0f32f82
parent 728acf521c
commit 65d0f32f82
1 changed files with 2 additions and 1 deletions
--- a/Marlin/src/module/planner.cpp
+++ b/Marlin/src/module/planner.cpp
@ -1092,7 +1092,8 @@ void Planner::_buffer_steps(const int32_t (&target)[XYZE], float fr_mm_s, const
  float max_stepper_speed = 0, min_axis_accel_ratio = 1; // ratio < 1 means acceleration ramp needed
  LOOP_XYZE(i) {
    const float cs = FABS((current_speed[i] = delta_mm[i] * inverse_secs));
-    NOMORE(min_axis_accel_ratio, max_jerk[i] / cs);
+    if (cs >  max_jerk[i]) 
+      NOMORE(min_axis_accel_ratio, max_jerk[i] / cs);
    NOLESS(max_stepper_speed, cs);
    #if ENABLED(DISTINCT_E_FACTORS)
      if (i == E_AXIS) i += extruder;