PID autotune for the bed
Posted by charlieRC
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PID autotune for the bed July 25, 2019 08:08PM |
Registered: 10 years ago Posts: 157 |
I am running a custom built printer with a mini-rambo board and Marlin firmware. I sent M303 E-1 S80 and I am getting "Autotune failed: bad extruder number" I came up with this line after watching a few Y/t vids. According to what I've seen E-1 should represent the bed heater. Is there something I am doing wrong?
If I haven’t screwed it up yet, I’m not thinking hard enough!
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If I haven’t screwed it up yet, I’m not thinking hard enough!
CoreXY, Titan Aero, Duet WiFi, custom design and build
Cartesian, E3D v6 hotend, Bondtech QR extruder, custom design and build
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Re: PID autotune for the bed July 26, 2019 12:49AM |
Admin Registered: 12 years ago Posts: 6,860 |
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Re: PID autotune for the bed July 26, 2019 10:43AM |
Registered: 10 years ago Posts: 157 |
I have the thermistor defined for the heated bed. I am not sure what you mean “heated bed configured” the printer prints fine accept for an occasional “run away” error. Is there something else that needs to be “configured”?
If I haven’t screwed it up yet, I’m not thinking hard enough!
CoreXY, Titan Aero, Duet WiFi, custom design and build
Cartesian, E3D v6 hotend, Bondtech QR extruder, custom design and build
If I haven’t screwed it up yet, I’m not thinking hard enough!
CoreXY, Titan Aero, Duet WiFi, custom design and build
Cartesian, E3D v6 hotend, Bondtech QR extruder, custom design and build
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Re: PID autotune for the bed July 26, 2019 10:53AM |
Admin Registered: 12 years ago Posts: 6,860 |
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Re: PID autotune for the bed July 27, 2019 12:11PM |
Registered: 10 years ago Posts: 157 |
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Re: PID autotune for the bed July 27, 2019 07:46PM |
Registered: 5 years ago Posts: 265 |
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Re: PID autotune for the bed July 28, 2019 08:37AM |
Registered: 10 years ago Posts: 157 |
Ahhhhhh..... ok. That gives me something to check. My guess is you hit it on the nose. Didn’t know about PIDBEDTEMP..
Thank you.
If I haven’t screwed it up yet, I’m not thinking hard enough!
CoreXY, Titan Aero, Duet WiFi, custom design and build
Cartesian, E3D v6 hotend, Bondtech QR extruder, custom design and build
Thank you.
If I haven’t screwed it up yet, I’m not thinking hard enough!
CoreXY, Titan Aero, Duet WiFi, custom design and build
Cartesian, E3D v6 hotend, Bondtech QR extruder, custom design and build
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Re: PID autotune for the bed July 28, 2019 11:36AM |
Registered: 6 years ago Posts: 1,859 |
I could never get the PID Autotune to correctly function, the numbers it would give always gave me some kind of temperature error during 3D Printing.
Eventually decided to just use the Bang-bang with the Marlin defaults - This has never failed me for both the Nozzle and Bed.
This not be the best way though I cannot complain about the quality of my 3D Prints.
Though one day may try to again to Autotune them.
Edited 1 time(s). Last edit at 07/28/2019 11:37AM by Roberts_Clif.
Computer Programmer / Electronics Technician
Eventually decided to just use the Bang-bang with the Marlin defaults - This has never failed me for both the Nozzle and Bed.
This not be the best way though I cannot complain about the quality of my 3D Prints.
Though one day may try to again to Autotune them.
Edited 1 time(s). Last edit at 07/28/2019 11:37AM by Roberts_Clif.
Computer Programmer / Electronics Technician
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Re: PID autotune for the bed July 29, 2019 01:49PM |
Registered: 5 years ago Posts: 265 |
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Re: PID autotune for the bed July 29, 2019 02:25PM |
Registered: 6 years ago Posts: 1,859 |
Quote
MMcLure
There have been some recent changes in the latest Marlin (bugfix-2.0.x) that should greatly improve PID performance, specially for the bed. You might want to try the latest bugfix-2.0.x sources.
Thank you ! an I do have Marlin 2.0 on my machines
Edited 1 time(s). Last edit at 07/29/2019 02:26PM by Roberts_Clif.
Computer Programmer / Electronics Technician
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Re: PID autotune for the bed July 29, 2019 05:17PM |
Registered: 5 years ago Posts: 265 |
The changes in question are only a few weeks old (and there was a commit last night that is also supposed to improve PID behavior). I haven't had any real problems with PID on the bed and hot end, either with the old code in 1.1.x or the new code in 2.0.x, although I think I see somewhat less oscillation around the setpoint at the beginning of a print with the code from a couple of weeks ago.
Edited 1 time(s). Last edit at 07/29/2019 05:28PM by MMcLure.
Edited 1 time(s). Last edit at 07/29/2019 05:28PM by MMcLure.
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Re: PID autotune for the bed July 30, 2019 01:58PM |
Registered: 10 years ago Posts: 157 |
Quote
MMcLure
Do you have the PIDTEMPBED configuration variable enabled in your configuration? If you don't, the bed will be configured to use bang-bang control instead of PID, so PID tuning doesn't make any sense.
YEP. That was my problem. Uncommitted it and the Autotune ran fine. Thank you very much
If I haven’t screwed it up yet, I’m not thinking hard enough!
CoreXY, Titan Aero, Duet WiFi, custom design and build
Cartesian, E3D v6 hotend, Bondtech QR extruder, custom design and build
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