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heater: Introduce smooth_time config option; remove pid_deriv_time

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Add generic temperature smoothing to the Heater class.  This is useful
to avoid min_extrude_temp and verify_heater errors due to measurement
noise.

Rename the pid_deriv_time config option to smooth_time so that the
smoothing amount need only be specified once.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2018-07-06 13:27:05 -04:00
parent 32175bc66a
commit b0ee323e2e
3 changed files with 36 additions and 25 deletions
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8
config/example.cfg
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@@ -161,6 +161,10 @@ sensor_pin: analog13
#adc_voltage: 5.0
# The ADC comparison voltage. This parameter is only valid when the
# sensor is an AD595 or "PT100 INA826". The default is 5 volts.
#smooth_time: 2.0
# A time value (in seconds) over which temperature measurements will
# be smoothed to reduce the impact of measurement noise. The default
# is 2 seconds.
control: pid
# Control algorithm (either pid or watermark). This parameter must
# be provided.
@@ -173,10 +177,6 @@ pid_Ki: 1.08
pid_Kd: 114
# Kd is the "derivative" constant for the pid. This parameter must
# be provided for PID heaters.
#pid_deriv_time: 2.0
# A time value (in seconds) over which the derivative in the pid
# will be smoothed to reduce the impact of measurement noise. The
# default is 2 seconds.
#pid_integral_max:
# The maximum "windup" the integral term may accumulate. The default
# is to use the same value as max_power.