1 Topic by satman49 (edited by satman49 2013-04-22 01:19:58)

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Topic: pid autotune

I am looking  athttp://www.soliwiki.com/PID_tuning says   To start the autotune process we will use the command M303 S200 C5(Important: All letters in Gcode need to be CAPITALIZED) just where do I enter that?

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

2 Reply by elmoret

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Re: pid autotune

Manual Control tab, in the box labeled G-Code

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3 Reply by satman49

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Re: pid autotune

ok thanks

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

4 Reply by satman49

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Re: pid autotune

SD troubling shootings say:
The Heat is unstable – it varies a great deal instead of resting on one temperature.

There is an easy fix for this. Do the PID auto tune operation by entering M303 190. This only works for the Nozzle heater, and not the bed. Once you have entered the command a readout similar to the following shall read out:

bias: 103 d: 103 min: 147.98 max: 152.02
Ku: 65.06 Tu: 30.67
Clasic PID
Kp: 39.04
Ki: 2.55
Kd: 149.66
Once you have these values, you may adjust the PID settings by entering the following (with your particular values.)

Which is correct  M303 190 or M303 S200 C5?

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

5 Reply by ronsii

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Re: pid autotune

The C5 tells it to go through 5 cycles of testing to come up with the average number at the end that you will use. the 190 is for if you are going to use 190 as your temp... likewise for the 200 if you are going to use 200 then go with that.

6 Reply by satman49

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Re: pid autotune

Here is what I get when I do PID AUTOTUNE, as you see there are 4 bias lines and 3 classic pid lines Question is , which of the Kp ki kd values do I use? Average them maybe?

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SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

7 Reply by elmoret

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Re: pid autotune

Use the last set.

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8 Reply by DynamechGT (edited by DynamechGT 2013-05-05 16:57:56)

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Re: pid autotune

Edited: didn't know what I was talking about - listen to elmoret. :-)