PolyCraft/kiln-controller
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add throttling of elements below a specific temp if outside the pid control window

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jbruce12000 2023-11-21 09:53:09 -05:00
parent e4f954f55b
commit 4fddeeb4a8
2 changed files with 14 additions and 0 deletions
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10
config.py
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@ -228,3 +228,13 @@ automatic_restart_state_file = os.path.abspath(os.path.join(os.path.dirname( __f
kiln_profiles_directory = os.path.abspath(os.path.join(os.path.dirname( __file__ ),"storage", "profiles")) kiln_profiles_directory = os.path.abspath(os.path.join(os.path.dirname( __file__ ),"storage", "profiles"))
#kiln_profiles_directory = os.path.abspath(os.path.join(os.path.dirname( __file__ ),'..','kiln-profiles','pottery')) #kiln_profiles_directory = os.path.abspath(os.path.join(os.path.dirname( __file__ ),'..','kiln-profiles','pottery'))
########################################################################
# low temperature throttling of elements
# kiln elements have lots of power and tend to drastically overshoot
# at low temperatures. When under the set point and outside the PID
# control window and below throttle_below_temp, only throttle_percent
# of the elements are used max.
# To prevent throttling, set throttle_percent to 100.
throttle_below_temp = 300
throttle_percent = 20

4
lib/oven.py
View File

@ -793,6 +793,10 @@ class PID():
elif error > (1 * config.pid_control_window): elif error > (1 * config.pid_control_window):
log.info("kiln outside pid control window, max heating") log.info("kiln outside pid control window, max heating")
output = 1 output = 1
if config.throttle_below_temp and config.throttle_percent:
if ispoint <= config.throttle_below_temp:
output = config.throttle_percent/100
log.info("max heating throttled at %d percent below %d degrees to prevent overshoot" % (config.throttle_percent,config.throttle_below_temp))
else: else:
icomp = (error * timeDelta * (1/self.ki)) icomp = (error * timeDelta * (1/self.ki))
self.iterm += (error * timeDelta * (1/self.ki)) self.iterm += (error * timeDelta * (1/self.ki))