3DPrinting/Prusa-Firmware
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Do not overflow during LA acceleration limiting

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Perform the check one step earlier, avoiding 32bit overflow for very low
compression factors.

Fixes #2566 (although for K15 to have effect the conversion probably
needs to be adjusted on the low end)
This commit is contained in:
Yuri D'Elia 2020-04-09 22:34:30 +02:00
parent 02a36c498c
commit 13b0e27cd7
1 changed files with 3 additions and 3 deletions
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6
Firmware/planner.cpp
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@ -1081,9 +1081,9 @@ Having the real displacement of the head, we can calculate the total movement le
if (e_D_ratio > 3.0)
block->use_advance_lead = false;
else if (e_D_ratio > 0) {
const uint32_t max_accel_steps_per_s2 = cs.max_jerk[E_AXIS] / (extruder_advance_K * e_D_ratio) * steps_per_mm;
if (block->acceleration_st > max_accel_steps_per_s2) {
block->acceleration_st = max_accel_steps_per_s2;
const float max_accel_per_s2 = cs.max_jerk[E_AXIS] / (extruder_advance_K * e_D_ratio);
if (cs.acceleration > max_accel_per_s2) {
block->acceleration_st = ceil(max_accel_per_s2 * steps_per_mm);
#ifdef LA_DEBUG
SERIAL_ECHOLNPGM("LA: Block acceleration limited due to max E-jerk");
#endif