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toolhead: Synchronize print_time to main mcu's time

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Instead of starting the print_time at zero, start it at the estimated
time of the main mcu's clock.  This simplifies the code and it ensures
that print_time never goes backwards.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2017-09-12 12:24:44 -04:00
parent b9586bad18
commit 5dfe4e1eb9
3 changed files with 62 additions and 98 deletions
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6
klippy/fan.py
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@@ -39,6 +39,7 @@ class PrinterFan:
class PrinterHeaterFan:
def __init__(self, printer, config):
self.fan = PrinterFan(printer, config)
self.mcu = printer.objects['mcu']
heater = config.get("heater", "extruder0")
self.heater = extruder.get_printer_heater(printer, heater)
self.heater_temp = config.getfloat("heater_temp", 50.0)
@@ -51,9 +52,8 @@ class PrinterHeaterFan:
power = 0.
if target_temp or current_temp > self.heater_temp:
power = 1.
mcu_time = self.fan.mcu_fan.get_mcu().system_to_mcu_time(
eventtime + FAN_MIN_TIME)
self.fan.set_pwm(mcu_time, power)
print_time = self.mcu.estimated_print_time(eventtime) + FAN_MIN_TIME
self.fan.set_speed(print_time, power)
return eventtime + 1.
def add_printer_objects(printer, config):