From bcaf818c0e2bc6b92a579318b9ac97911d0104bf Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Wed, 8 Mar 2017 20:00:27 -0500 Subject: fan: Default to using software PWM Not all hardware has PWM support and there is no compelling reason to use hardware PWM for fans. Change the default to use software PWM. Signed-off-by: Kevin O'Connor --- klippy/fan.py | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'klippy/fan.py') diff --git a/klippy/fan.py b/klippy/fan.py index 739af2f1..2f9fb7a5 100644 --- a/klippy/fan.py +++ b/klippy/fan.py @@ -5,6 +5,7 @@ # This file may be distributed under the terms of the GNU GPLv3 license. FAN_MIN_TIME = 0.1 +PWM_CYCLE_TIME = 0.010 class PrinterFan: def __init__(self, printer, config): @@ -16,8 +17,9 @@ class PrinterFan: self.kick_start_time = config.getfloat('kick_start_time', 0.1) def build_config(self): pin = self.config.get('pin') - hard_pwm = self.config.getint('hard_pwm', 128) - self.mcu_fan = self.printer.mcu.create_pwm(pin, hard_pwm, 0) + hard_pwm = self.config.getint('hard_pwm', 0) + self.mcu_fan = self.printer.mcu.create_pwm( + pin, PWM_CYCLE_TIME, hard_pwm, 0.) # External commands def set_speed(self, print_time, value): value = max(0., min(1., value)) -- cgit v1.2.3-70-g09d2