PID on the bed of my Geeetech i3 Pro C

I had PID working under 1.1.8 beautifully but when I upgraded to 2.0.x (With bugfixes) the same settings ceased to work and for some reason the "auto-tune" feature just hangs.

Any idea what would be a reasonable default starting point (assuming that is the cause for the hang) ??

Regards,
Dave

I never had any PID Autotune using M303 to operate my heater or bed correctly

I have always used the defaults.

// Ultimaker
#define DEFAULT_Kp 22.2
#define DEFAULT_Ki 1.08
#define DEFAULT_Kd 114

And this one
#define DEFAULT_bedKp 10.00
#define DEFAULT_bedKi .023
#define DEFAULT_bedKd 305.4

I have many from the Manufacture, none work
And have run the Auto-Tune many times and never received numbers that operated close to the default numbers

Would also be interested to know how the best way to get the Auto-Tune feature to give me usable numbers.

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Computer Programmer / Electronics Technician

Nah, thanks for the reply but using the defaults (or your suggestions) if I set a target temp of 50c it only goes to 40c !!
About as much use as a chocolate tea pot ;-)

I have raised a bug report on it.

Dave

As Stated!
I had no problems with the Ultimaker defaults, have printed PLA and ABS using the Defaults posted, have set the Bed temp from 50-110C and the Nozzle from 170-250C with no problems.
I could never get any of the Auto-tune tutorials for helping with tuning give any usable values.

If someone has a good tutorial or a simple way of making Auto tune function the information would be greatly appreciated.

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Computer Programmer / Electronics Technician

No PID for the bed is the simplest effective solution !

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"A comical prototype doesn't mean a dumb idea is possible" (Thunderf00t)

Quote
MKSA
No PID for the bed is the simplest effective solution !

Thank You.

As I double check my firmware numbers, have the Bed Temp PID remarked out

//#define PIDTEMPBED

#define MAX_BED_POWER 255 // limits duty cycle to bed; 255=full current

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Computer Programmer / Electronics Technician

That is NOT a solution ...

To eliminate a problem IS a solution to the said problem.

Anyway. When you have solved it, try to measure the T° at different points of the bed. Compare to the variation between PID and bang bang mode.

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"A comical prototype doesn't mean a dumb idea is possible" (Thunderf00t)