fan kickstart

Murch

fan kickstart does not work for me. When setting fan to 20% it does not start. Manually giving it a spin makes it "kickstart".
I looked at the code (current dev) and found some lines related to kickstarting the fan, but it looks like this is not implemented correctly. At least I could not find the code where the fan is actually set to 100% to kickstart it.
Can somebody confirm that the feature is working or the code is not yet finished?

Regards

Repetier

It is implemented in HAL.cpp but only for fan and fan 2 and not for cooling fans. Rest is in printer.cpp

void Printer::setFanSpeedDirectly(uint8_t speed) {

#if FAN_PIN > -1 && FEATURE_FAN_CONTROL

    if(pwm_pos[PWM_FAN1] == speed)

        return;

#if FAN_KICKSTART_TIME

    if(fanKickstart == 0 && speed > pwm_pos[PWM_FAN1] && speed < 85)

    {

         if(pwm_pos[PWM_FAN1]) fanKickstart = FAN_KICKSTART_TIME / 100;

         else                  fanKickstart = FAN_KICKSTART_TIME / 25;

    }

#endif

    pwm_pos[PWM_FAN1] = speed;

#endif

}

Murch

Ah ok, i found it in HAL.cpp
But unfortunately it doesn't work for me. I will try to increase the kickstart time, maybe that will help...

Murch

i tried even values of 2000 for FAN_KICKSTART_TIME, but the fan does not start for values < 60%

any ideas?

Repetier

Maybe because of this condition
   if(fanKickstart == 0 && speed > pwm_pos[PWM_FAN1] && speed < 85)
 speed < 85 means it kickstarts only below 33% = 85/255

Murch

that is true for 60%, but that's only a rough estimate where my fan starts without kickstarting. the problem arised with 20%, where i would like it to kickstart. it does not work there either