Permalink
Browse files

Added temperature window to M109. This is needed for systems with no …

…overshoot PID.
  • Loading branch information...
1 parent ffea800 commit 02af69911ec48898c5590025badd20cc2a1748e1 @ErikZalm ErikZalm committed Apr 30, 2012
Showing with 4 additions and 3 deletions.
  1. +1 −0 Marlin/Configuration.h
  2. +3 −3 Marlin/Marlin.pde
@@ -58,6 +58,7 @@
// Actual temperature must be close to target for this long before M109 returns success
#define TEMP_RESIDENCY_TIME 10 // (seconds)
#define TEMP_HYSTERESIS 3 // (degC) range of +/- temperatures considered "close" to the target one
+#define TEMP_WINDOW 1 // (degC) Window around target to start the recidency timer x degC early.
// The minimal temperature defines the temperature below which the heater will not be enabled It is used
// to check that the wiring to the thermistor is not broken.
View
@@ -104,12 +104,12 @@
// M240 - Trigger a camera to take a photograph
// M301 - Set PID parameters P I and D
// M302 - Allow cold extrudes
+// M303 - PID relay autotune S<temperature> sets the target temperature. (default target temperature = 150C)
// M400 - Finish all moves
// M500 - stores paramters in EEPROM
// M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
// M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to.
// M503 - print the current settings (from memory not from eeprom)
-// M303 - PID relay autotune S<temperature> sets the target temperature. (default target temperature = 150C)
// M999 - Restart after being stopped by error
//Stepper Movement Variables
@@ -940,8 +940,8 @@ void process_commands()
#ifdef TEMP_RESIDENCY_TIME
/* start/restart the TEMP_RESIDENCY_TIME timer whenever we reach target temp for the first time
or when current temp falls outside the hysteresis after target temp was reached */
- if ((residencyStart == -1 && target_direction && !isHeatingHotend(tmp_extruder)) ||
- (residencyStart == -1 && !target_direction && !isCoolingHotend(tmp_extruder)) ||
+ if ((residencyStart == -1 && target_direction && (degHotend(tmp_extruder) >= (degTargetHotend(tmp_extruder)-TEMP_WINDOW))) ||
+ (residencyStart == -1 && !target_direction && (degHotend(tmp_extruder) <= (degTargetHotend(tmp_extruder)+TEMP_WINDOW))) ||
(residencyStart > -1 && labs(degHotend(tmp_extruder) - degTargetHotend(tmp_extruder)) > TEMP_HYSTERESIS) )
{
residencyStart = millis();

0 comments on commit 02af699

Please sign in to comment.