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Linear fan kickstart time #27072

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Merged
thinkyhead merged 8 commits into from
Jul 5, 2024
Merged

Linear fan kickstart time #27072

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c744516
Linear fan kickstart time
vovodroid Apr 30, 2024
faa6ad2
Use delta between speed for time calculation, always apply full speed.
vovodroid Apr 30, 2024
75a632b
misc. cleanup
thinkyhead May 17, 2024
5eaccb4
optional semi-kick
thinkyhead May 17, 2024
a36201f
Revert controller fan
vovodroid May 18, 2024
c6b98e5
comma
thinkyhead Jul 5, 2024
7187a9e
ws
thinkyhead Jul 5, 2024
49a9f8c
Merge branch 'bugfix-2.1.x' into pr/27072
thinkyhead Jul 5, 2024
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2 changes: 2 additions & 0 deletions Marlin/Configuration_adv.h
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Original file line number Diff line number Diff line change
Expand Up @@ -604,6 +604,8 @@
*/
//#define FAN_KICKSTART_TIME 100 // (ms)
//#define FAN_KICKSTART_POWER 180 // 64-255
//#define FAN_KICKSTART_LINEAR // Set kickstart time linearly based on the speed, e.g. for 20% (51) it will be FAN_KICKSTART_TIME * 0.2.
// Useful for quick speed up to low speed. Kickstart power must be set to 255.

// Some coolers may require a non-zero "off" state.
//#define FAN_OFF_PWM 1
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2 changes: 1 addition & 1 deletion Marlin/src/inc/Conditionals_post.h
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Expand Up @@ -2752,7 +2752,7 @@

// Fan Kickstart
#if FAN_KICKSTART_TIME && !defined(FAN_KICKSTART_POWER)
#define FAN_KICKSTART_POWER 180
#define FAN_KICKSTART_POWER TERN(FAN_KICKSTART_LINEAR, 255, 180)
#endif

// Servos
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8 changes: 6 additions & 2 deletions Marlin/src/inc/SanityCheck.h
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Expand Up @@ -1011,8 +1011,12 @@ static_assert(NUM_SERVOS <= NUM_SERVO_PLUGS, "NUM_SERVOS (or some servo index) i
#endif

// Fan Kickstart power
#if FAN_KICKSTART_TIME && !WITHIN(FAN_KICKSTART_POWER, 64, 255)
#error "FAN_KICKSTART_POWER must be an integer from 64 to 255."
#if FAN_KICKSTART_TIME
#if ENABLED(FAN_KICKSTART_LINEAR) && FAN_KICKSTART_POWER != 255
#error "FAN_KICKSTART_LINEAR requires a FAN_KICKSTART_POWER of 255."
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@thinkyhead thinkyhead May 20, 2024

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This requirement can probably be removed by only kick-starting the fan when the power is set below FAN_KICKSTART_POWER, and then applying the time scaling based on fan_speed / FAN_KICKSTART_POWER.

#elif !WITHIN(FAN_KICKSTART_POWER, 64, 255)
#error "FAN_KICKSTART_POWER must be an integer from 64 to 255."
#endif
#endif

/**
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16 changes: 10 additions & 6 deletions Marlin/src/module/planner.cpp
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Expand Up @@ -1310,16 +1310,20 @@ void Planner::recalculate(const_float_t safe_exit_speed_sqr) {

void Planner::kickstart_fan(uint8_t (&fan_speed)[FAN_COUNT], const millis_t &ms, const uint8_t f) {
static millis_t fan_kick_end[FAN_COUNT] = { 0 };
#if ENABLED(FAN_KICKSTART_LINEAR)
static uint8_t set_fan_speed[FAN_COUNT] = { 0 };
#endif
if (fan_speed[f] > FAN_OFF_PWM) {
if (fan_kick_end[f] == 0) {
fan_kick_end[f] = ms + FAN_KICKSTART_TIME;
const bool first_kick = fan_kick_end[f] == 0 && TERN1(FAN_KICKSTART_LINEAR, fan_speed[f] > set_fan_speed[f]);
if (first_kick)
fan_kick_end[f] = ms + (FAN_KICKSTART_TIME) TERN_(FAN_KICKSTART_LINEAR, * (fan_speed[f] - set_fan_speed[f]) / 255);
if (first_kick || PENDING(ms, fan_kick_end[f])) {
fan_speed[f] = FAN_KICKSTART_POWER;
return;
}
else if (PENDING(ms, fan_kick_end[f]))
fan_speed[f] = FAN_KICKSTART_POWER;
}
else
fan_kick_end[f] = 0;
fan_kick_end[f] = 0;
TERN_(FAN_KICKSTART_LINEAR, set_fan_speed[f] = fan_speed[f]);
}

#endif
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