From 0d99dc0a3ffa5673ae9c3b94352e8697498278a6 Mon Sep 17 00:00:00 2001
From: Marek Bel <marek.bel@posta.cz>
Date: Mon, 3 Sep 2018 17:32:42 +0200
Subject: [PATCH] PFW-543 Add filament ramming when unloading filament with
MMU.
---
Firmware/mmu.cpp | 61 ++++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 57 insertions(+), 4 deletions(-)
diff --git a/Firmware/mmu.cpp b/Firmware/mmu.cpp
index 7ceb53e9..ac972c4a 100644
--- a/Firmware/mmu.cpp
+++ b/Firmware/mmu.cpp
@@ -642,6 +642,61 @@ void extr_adj(int extruder) //loading filament for SNMM
#endif
}
+//! @brief Unload sequence to optimize shape of the tip of the unloaded filament
+//!
+//! Ideas to minimize flash consumption of this code:
+//!
+//! Create const array of extrude and feed_rate on stack, call increment current_position, plan_buffer_line() and st_synchronize()
+//! in loop iterating over array.
+//!
+//! Same as previous, but create array in PROGMEM and call PGM_read instructions in a loop.
+//!
+static void filament_ramming()
+{
+ current_position[E_AXIS] += 1;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 1000 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] += 1;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 1500 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] += 2;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 2000 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] += 1.5;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 3000 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] += 2.5;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 4000 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] -= 15;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 5000 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] -= 14;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 1200 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] -= 6;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 600 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] += 10;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 700 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] -= 10;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 400 / 60, active_extruder);
+ st_synchronize();
+
+ current_position[E_AXIS] -= 50;
+ plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 2000 / 60, active_extruder);
+ st_synchronize();
+}
void extr_unload()
{ //unload just current filament for multimaterial printers
@@ -663,9 +718,7 @@ void extr_unload()
lcd_print(" ");
lcd_print(mmu_extruder + 1);
- current_position[E_AXIS] -= 80;
- plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 2500 / 60, active_extruder);
- st_synchronize();
+ filament_ramming();
mmu_command(MMU_CMD_U0);
// get response
@@ -986,4 +1039,4 @@ void mmu_eject_filament(uint8_t filament, bool recover)
{
puts_P(PSTR("Filament nr out of range!"));
}
-}
\ No newline at end of file
+}