A self-tuning PID demonstration GPL software using genetic algorithm.
Demonstration video here : https://www.youtube.com/watch?v=cK6kWN9K_do
Pid Auto Tune Bed Repetier Kit
Apr 09, 2019 The printer will take about 5 minutes or so and run through the auto-tune test. When it is complete, Marlin will spit out the test values for P, I and D looking something like this near the end of the output: Recv: PID Autotune finished! Put the last Kp, Ki and Kd constants from below into Configuration.h Recv: #define DEFAULTKp 27.44.
![Repetier firmware pid autotune bed Repetier firmware pid autotune bed](/uploads/1/2/5/8/125869421/615663765.jpg)
- Jun 09, 2016 I finally got it to work, you have to heat your bed withing 10 degrees of your target temperature then run the pid autotune, then it will work, as long as you have the pid autotune enabled in your marlin code and that other option below it commented out you are good to go, try that and let me know if it worked for you, if you haven't already figured it out.
- Dec 17, 2013 hi, i'm finishing my first self made prusa and i'm at the PID autotune point of the build. Ive managed to autotune the extruder, which now gives me a nice oscillation of 1 degree, but the bed temp is still swinging violently so i figured i'd autotune the bed too. The thing is that it keeps givin.
Explanation here : https://kevinjoly25.wordpress.com/2015/01/13/pid-controller-auto-tuning-using-genetic-algorithm/
- Qt4
$ mkdir build
$ cd build
$ cmake .
$ make
$ cd build
$ cmake .
$ make
No install method has been provided yet. However, you can run the software from the build directory:$ ./pid-autotune
There is 4 dock widgets in this software:
- Motor: enable the user to choose a motor to use and test it in closed on opened loop.
- Controller : enable the user to choose a controller to use with the motor (check 'Use controller'). The controller parameters can be set in this widget for test purpose.
- Graph settings : enable the user to change the axes scale by setting the min and max to be displayed.
- Genetic : enable the user to control the genetic algorithm parameters such as:
- input : value of the input applied on the system.
- min/max Kx : boundary values of each PID action.
- Evaluation time : system running time when evaluating fitness.
- Population size : size of the genetic algorithm's population.
- Mutation ratio : probability to mutate the offspring's variable.
- Crossover ratio : probability to crossover two parents.
- Overshoot penalty : ratio which multiply the error when an overshoot occurs. If you don't want any overshoot, set this to the maximum.
- Elite num : Number of best parents kept in the next generation of population.The start button launch the genetic process. Pause stop the process, press start to launch it again without any loss. Reset enable the user to generate a new random population by deleting the old one.
Example
- Under 'Motor' : choose the DummyMotor.
- Under 'Graph settings' : set xMax to 0.1 and yMax to 2.0.
- Under 'Genetic' : set maxKp to 1.0, maxKd to 2.0, maxKi to 0.1.
- Hit start button and enjoy the dance of a self-tuning PID! ;)
More on GAs..
The fitness function is using the sum of squarred error to evaluate the generated PID.Thanks to this fitness function, tournament selection can be used in order to select parents of the next PID population.The genetic algorithm implemented in Genetic.cpp uses arithmetic crossover and gaussian mutation to generate the new population.Elitism can be used.
This software is using the GPL software QCustomPlot from Emanuel Eichhammer.
Since the board is set up from the factory for bang-bang control for the heatbed and not PWM/PID control, I don't think there is any tuning you can do for the bed without reflashing the firmware with settings for PID/PWM. PWM/PID cannot be used with an external mechanical relay, only a FET or some solid-state relays. If using the on-board FET, it should be possible to use PWM/PID but only with reflashed firmware.
After the bed reaches temperature, is it stable within a few degrees C?
Dev c++ online. Jan 30, 2011 gotoxy is a standard C function defined in, but it will not work in ANSI C compilers such as Dev-C. Because gotoxy is a Turbo-C specific function, which means it is not part of the standard. However, if you insist on using console functions, you can define your own function by using member. Apr 21, 2012 How can we use gotoxy statement in dev C? Pretty much the same as using it in MS Visual C Express, except you don't need using namespace Sysyem. Here's a small demo of using the command gotoXY in Dev-CPP v5.2.0.0, that compiles and runs. However using gotoxy funxtion is quiet difficult in devc because there is no such header file present in dev c to use gotoxy function what we have to all do is that we have to create the function for positioning cursor in devc. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.
Pid Auto Tune Bed Repetier Parts
If while heating up, there is massive temperature overshoot and/or a bad oscillation of temperature above and below the target temp, then yes, there is a problem that will need some tuning or redesign ( the bed thermistor may not be thermally connected to the bed well enough). Otherwise, don't worry about it.
Pid Tune 3d Printer
I haven't had any issues with wild temperature swings. I have my bed set up so I can use it with 12v through the FET for lower temperatures or with a flip of a switch, powered by a 20V power supply through a relay.