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Prusa-Firmware-MMU
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Fixes for loading filament into nozzle 

Slower speed once we reach the fsensor + avoid grind while disengaging the Idler
while the printer is already pulling the filament.
pull/130/head
D.R.racer 2021-10-14 13:55:06 +02:00 committed by DRracer
parent 9dc2ccc337
commit abe2567c84
2 changed files with 10 additions and 2 deletions
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10
src/config/config.h
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@ -72,12 +72,18 @@ static constexpr U_mm findaTriggerDistance = 4.5_mm; /// 9.0_mm /// FINDA trigge
static constexpr U_mm cuttingEdgeToFindaMidpoint = 22.85_mm; /// Cutting edge to Midpoint of FINDA should be 22.85_mm.
static constexpr U_mm findaToCoupler = 12.0_mm; /// 12.0_mm /// FINDA Coupler side to coupler screw.
static constexpr U_mm couplerToBowden = 3.5_mm; /// 3.5_mm /// FINDA Coupler screw to bowden mmu2s side (in coupling).
static constexpr U_mm defaultBowdenLength = 427.0_mm; /// ~427.0_mm /// Default Bowden length. @TODO Should be stored in EEPROM.
// @@TODO this is very tricky - the same MMU, same PTFE,
// just another piece of PLA (probably having more resistance in the tubes)
// and we are at least 40mm off! It looks like this really depends on the exact position
// We'll probably need to check for stallguard while pushing the filament to avoid ginding the filament
static constexpr U_mm defaultBowdenLength = 467.0_mm; /// ~427.0_mm /// Default Bowden length. @TODO Should be stored in EEPROM.
static constexpr U_mm minimumBowdenLength = 341.0_mm; /// ~341.0_mm /// Minimum bowden length. @TODO Should be stored in EEPROM.
static constexpr U_mm maximumBowdenLength = 792.0_mm; /// ~792.0_mm /// Maximum bowden length. @TODO Should be stored in EEPROM.
static constexpr U_mm feedToFinda = cuttingEdgeToFindaMidpoint + filamentMinLoadedToMMU;
static constexpr U_mm cutLength = 8.0_mm;
static constexpr U_mm fsensorToNozzle = 20.0_mm; /// ~20mm from MK4's filament sensor through extruder gears into nozzle
static constexpr U_mm fsensorToNozzleAvoidGrind = 5.0_mm;
/// Begin: Pulley axis configuration
static constexpr AxisConfig pulley = {
@ -97,7 +103,7 @@ static constexpr PulleyLimits pulleyLimits = {
.accel = 800.0_mm_s2,
};
static constexpr U_mm_s pulleyFeedrate = 40._mm_s;
static constexpr U_mm_s pulleySlowFeedrate = 1._mm_s;
static constexpr U_mm_s pulleySlowFeedrate = 20._mm_s;
/// End: Pulley axis configuration
/// Begin: Selector configuration

2
src/logic/feed_to_bondtech.cpp
View File

@ -50,6 +50,8 @@ bool FeedToBondtech::Step() {
if (mm::motion.QueueEmpty()) {
mg::globals.SetFilamentLoaded(mg::FilamentLoadState::InNozzle);
mi::idler.Disengage();
// while disengaging the idler, keep on moving with the pulley to avoid grinding while the printer is trying to grab the filament itself
mm::motion.PlanMove<mm::Pulley>(config::fsensorToNozzleAvoidGrind, config::pulleySlowFeedrate);
state = DisengagingIdler;
}
return false;