Heated bed 2500 Watt + Duet3 6hc

Phaedrux

@barbarossa-cologne said in Heated bed 2500 Watt + Duet3 6hc:

It's working but heating up needs a lot of time. How can I change this?
23 to 60 degree needs 10 or more minutes

Have you PID tuned the heaters and saved the results?
https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control

dutti

@Phaedrux
I started 3D print 3 months ago. So I´m sorry when I don´t understand some code etc.
Is this picture helpful?
thanks for all

I have to say that this morning it was heating up a bit faster. I disconnected other things from the socket. But it is still slow.... SSR isn´t warm.
the house is about 70 years old... maybe it is not enough power on the socket??

jens55

Ahhhhh .... the guilty party is the PWM setting. You have set the heat pad to effectively be 250W!
Calibration voltage 0.0V ???

dutti

@jens55
Ok. Do you mean 2500 watt?
How can I change this parameters ?

jens55

Remove the portion of your M307 command in config.g that says "S0.1"
Run heater tuning again.
The way you have things configured at the moment is that your heat pad is effectively 250W!

dutti

@jens55
ok I understand.... with S1 or S0.5 its heating much fast,but it comes to a fault. ``temperatur rising much slowly than expected. 1.3.C /sec. (with S0.5 its 0.7c/ sec.)

jens55

Default is S1 so just remove the portion that specifies 'S' or replace it with S1.0. You will want full power.
You need to run heater tuning again in order to get rid of the warning message. You probably will see a message talking about being over - powered but that is expected. You need to understand what that means nad be aware of it but it's not a show stopper.

jens55

What is the command you give to start the tune ?

Stephen6309

https://duet3d.dozuki.com/Wiki/Gcode#Section_M303_Run_heater_tuning

dutti

@jens55
With S.1 or nothing in the config.g the always comes to a warning:
``temperatur rising much slowly than expected. 1.3.C /sec"

I mean I can skip the warning and start again. A few times and it's hot enough. So there are 2 options.

S0.1 = heating slow BUT NO warning ``temperatur rising much slowly than expected. 1.3.C /sec"

S1.0 or nothing: temperature rising fast but it comes to the warning:
``temperatur rising much slowly than expected. 1.3.C /sec"

I use the button in the web control. I mean I used the configuration tool to setup heater etc.

jens55

It is of course up to you if you use S0.1 or S1.0, you need to decide while keeping in mind the speed of warmup (and maximum temperature).
Forget about the warning message for now!

jens55

It's been a while since I have done tuning so maybe someone else can chime in to give you details about how to get rid of the warning message.
Also, if the warning message results in the heater stopping to heat, then there is a problem. Again, I am not the right person to help out with that.

dutti

@jens55
Ok.. but why does it come to a warning when it is faster? The warning tells its rising to slow..
Why does it care about it? Haha
Can I skip this warning forever or change the value for " it's to slow"?
THANKS

dutti

@jens55
No worries. You already helped me. Thank you!!!!

jens55

The system tries to guess what it should see in the temperature rise. If it sees something that it thinks is out of the norm, it tells you about it. There are numerous parameters than can be tweaked from the 'standard' tuning and modifying them would alter the way that Duet thinks what is or isn't normal.
As long as the system doesn't throw a hard error, you can disregard the error and just keep it in the back of your mind.
A hard error is one where the system stops heating because it thinks there is something seriously wrong.

dutti

@Stephen6309
M303: Run heater tuning
Parameters

Hnnn heater number
Pnnn PWM to use, 0 to 1 (you should normally use 1 i.e. full power), default 1
Snnn target temperature
Examples

M303 H1 P0.4 S240 ; tune heater 1 using 40% PWM, target temperature 240C

I made this with my date and it was fixed. Thank

jens55

What you just posted is tuning for a nozzle heater.
Again, just leave out the parameter that sets PWM (P) unless you know what you are doing.
You should be running M303 H0 S60 or something in that area.

dutti

@jens55
I used the code with my specifications.
M303 H0 P0.7 S65
Sry

jens55

I don't understand why you insist on putting in PWM figures but if it makes you happy (and if it it doesn't give you a warning message) then so be it. Just be aware that it results in less power to your heat bed and causes a longer warmup time.

dutti

@jens55
25C - 60C
S.1 = 78sec
S.0.7 = 110 sec
Both it's ok in my mind
No warning. Thanks to. The tune was successful @Stephen6309