Duet Wifi - Accel

[samu_87]

@Phaedrux
Hello, Thanks a lot because all work well now.
The heated bed sometimes give me this:

I'm sure that the wiring etc is all okay, I have a big heated bed with low power so it spend a lot of time to heating up.

how I can modify that to give them more time?

M307 H0 R0.186 K0.226:0.000 D1.09 E1.35 S1.00 B1

Thanks!!!

[Phaedrux]

What is the fault error that you're getting in the console?

Can you send M308 S0 after you get a fault and report back with that message it gives you?

What does the heater graph look like when it faults?

[samu_87]

@Phaedrux As soon as the error occurs again I will give you the necessary data.
It usually comes back early in the morning when it's cold, I have a lot of mass to heat up so it takes a little longer than usual and gives an error. For now, thank you very much!

[samu_87]

@samu_87

M308 S0
Sensor 0 type Thermistor using pin e1temp, reading 82.2, last error: sensor not ready, T:100000.0 B:4138.0 C:0.00e+0 R:4700.0 L:0 H:0

Here the error... in a cold day the temperature rise slowly and the error appear.

Many thanks!

[Phaedrux]

Can you try changing the R and D values in your M307 command to match this?

M307 H0 R0.25 K0.226:0.000 D2 E1.35 S1.00 B1

[samu_87]

@Phaedrux
Yes I will try! What change R and D?

Thanks!

[Phaedrux]

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Heaters_tuning#manual-adjustments-to-the-heater-model-parameters

[samu_87]

@Phaedrux Here we are, in this cold morning give me this error:

Which parameter is better to tweak?

Thanks!

[Phaedrux]

@samu_87 said in Duet Wifi - Accel:

Which parameter is better to tweak?

Is this error with my previous suggestion?

[samu_87]

@Phaedrux

Yes, I put R = 0,15 and I think is better, because my bed I think it has a low warm up rate.
Can have any sense?

Thansk!

[Phaedrux]

Please try this method to try and determine your R parameter.

Measuring the heating rate (M307 R parameter)
Turn the heater on from cold, wait a few seconds for the temperature to start rising, then time how long it takes for the temperature to rise by a further amount e.g. 10C (for a slow bed heater you might wish to use a smaller amount e.g. 5C). Divide that temperature rise by the time in seconds to get the heating rate.