Prusa Mini and Octoprint  

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kevman
(@kevman)
Estimable Member
Posted by: @stephensmith
Posted by: @mike-io

I can't get OctoPrint to connect to my Mini. I've got a fresh install on a rPi4, connected to the micro jack on the Mini and I keep getting the following error. What am I missing?

Changing monitoring state from "Offline" to "Detecting serial port"
Serial port list: []
Changing monitoring state from "Detecting serial port" to "Error: Failed to autodetect serial port, please set it manually."
Failed to autodetect serial port, please set it manually.

I had to test 4 Cables before I found one that worked..

I had this issue when I disabled the Wifi and Bluetooth my Pi4, Apparently it messed with the USB as well. After I re-enabled it , it worked again. I have mine hardwired so I wanted to save resources by turning off the unnecessary things, but it caused that issue for me.

Posted : 26/06/2020 4:53 pm
mike-io
(@mike-io)
Active Member
Posted by: @stephensmith
Posted by: @mike-io

I can't get OctoPrint to connect to my Mini. I've got a fresh install on a rPi4, connected to the micro jack on the Mini and I keep getting the following error. What am I missing?

Changing monitoring state from "Offline" to "Detecting serial port"
Serial port list: []
Changing monitoring state from "Detecting serial port" to "Error: Failed to autodetect serial port, please set it manually."
Failed to autodetect serial port, please set it manually.

I had to test 4 Cables before I found one that worked..

Thank you for the tips! I switched the cable and it came right up.

Posted : 26/06/2020 10:45 pm
mike-io
(@mike-io)
Active Member

And then I made the mistake of rerouting my usb cable, unplugging it in the process and now that cable won't connect.

Posted : 27/06/2020 4:10 pm
towlerg
(@towlerg)
Honorable Member

@mike-io

I believe there are issues with the auto port detect logic in Octoprint, Gina suggested this https://github.com/markwal/OctoPrint-PortLister plugin as a work around.

Posted : 27/06/2020 4:22 pm
mike-io
(@mike-io)
Active Member
Posted by: @towlerg

@mike-io

I believe there are issues with the auto port detect logic in Octoprint, Gina suggested this https://github.com/markwal/OctoPrint-PortLister plugin as a work around.

Maybe. Though I just plugged and re-plugged in 4 different cables and checking if the pi had recognized a device being plugged in using dmesg and no cable was working until contrary to all advice about short cables with shielding my longest cheapest looking cable just connected. 

Posted : 27/06/2020 4:40 pm
ignacmc
(@ignacmc)
Active Member

@dhaya

Please be aware that this resets your Z live adjust to ZERO. You should also introduce its value here to avoid this

Posted : 01/08/2020 12:50 am
michae-15
(@michae-15)
Active Member

I've been using Octoprint on my Mini fine with a RPi3A+. Only thing i cant seem to get to work is an eta or print time left in Octoprint. Ive tried various plugins but non seem to work. Anyone got this to work? Thanks

Posted : 01/08/2020 2:44 pm
Vookimedlo
(@vookimedlo)
New Member

@michae-15

I wrote this plugin - it works for me. Let me know if you have any issues with that.

https://plugins.octoprint.org/plugins/prusa_mini_eta/

 

Posted : 01/08/2020 3:58 pm
charles.h13
(@charles-h13)
Famed Member

@michae-15

Me too.  I cannot get the ETA to print on the mini screen.  

Posted : 01/08/2020 7:45 pm
ignacmc
(@ignacmc)
Active Member

In my case, "Z Live Adjust" keeps resetting to ZERO, everytime I connect to Octoprint

Posted : 01/08/2020 7:56 pm
joan.t
(@joantabb)
Veteran Member Moderator

@ignacmc

Is it your Live Z, or is it your current Z height that resets to Zero? 

On My Mk2S, when Octoprint connects it effecttively 'resets' the   printer controller, similat to pressint the reset button, or turning the printer on... 

At this time the controller has absolutely no idea where the extruder is... 
For safety the controller assumes the extruder is at Z = 0.0mm  and it will refuse to go any lower, unless you, or Octoprint, initiate a Home Z axis, or a Home all axis command

the same will happen if you connect to the printer using Pronterprint

this is design intent not a Bug. 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 01/08/2020 11:46 pm
ignacmc
(@ignacmc)
Active Member

It is my "Live Adjust Z" which resets to ZERO. Being the actual value after First Layer Calibration around -1.050, that means that it starts printing almost on air if I don't rush to compensate it manually. The "Z live Adjust" value after calibration was persistent after turning the machine off and on again, so I don't understand what Octoprint does. It cannot be a design intent since before any print it always homes all axis and knows exactly where it is, and with an inductive sensor there is always a Z compensation value that you should not erase and reset to zero.

This never happens to me when I print on the Prusa Mini from USB stick. The Live adjust Z is not reset.

The thing is that I could swear that my first print with a "vanilla" OctoPrint was successful without resetting the said value. After that I installed some plugins, run software update and then the value gets reset to zero with every connection....quite strange

Thanks for your help

Ignacio

Posted : 01/08/2020 11:59 pm
michae-15
(@michae-15)
Active Member
Posted by: @charles-h13

@michae-15

Me too.  I cannot get the ETA to print on the mini screen.  

Im not really interested in getting the print time on the LCD screen of the mini. But the webinterface of octoprint gives no ETA or remaining print time. Did you get that to work?

Posted : 02/08/2020 9:28 am
michae-15
(@michae-15)
Active Member

@vookimedlo

Thanks. That works for the approx time yes. Is there a way to get the print time left to work?

Posted : 02/08/2020 9:33 am
michae-15
(@michae-15)
Active Member

@vookimedlo

I was using the wrong plugin. Installed yours via the URL method and it’s working!

 

Posted : 02/08/2020 11:32 am
robee
(@robee)
Trusted Member

@ignacmc can you list the firmware version and what Octoprint plugins you have installed?

Posted : 02/08/2020 3:51 pm
ignacmc
(@ignacmc)
Active Member
  • OctoPrint: 1.4.0
  • Delta Micro Calibrator Plugin: 1.0.4
  • DetailedProgress Plugin: 0.2.5
  • DisplayLayerProgress Plugin: 1.22.1
  • DisplayProgress Plugin: 0.1.3
  • EEPROM Marlin Editor Plugin: 1.2.1
  • OctoPod Plugin: 0.2.6
  • PrusaSlicer Thumbnails: 0.1.2
Posted : 02/08/2020 4:12 pm
Vookimedlo
(@vookimedlo)
New Member

@michae-15

I am very glad to hear that! 😉

Posted : 02/08/2020 6:41 pm
robee
(@robee)
Trusted Member
Posted by: @ignacmc
  • OctoPrint: 1.4.0
  • Delta Micro Calibrator Plugin: 1.0.4
  • DetailedProgress Plugin: 0.2.5
  • DisplayLayerProgress Plugin: 1.22.1
  • DisplayProgress Plugin: 0.1.3
  • EEPROM Marlin Editor Plugin: 1.2.1
  • OctoPod Plugin: 0.2.6
  • PrusaSlicer Thumbnails: 0.1.2

I would disable EEPROM Marlin Editor and Delta Micro Calibrator plugins and see if that helps.

Posted : 02/08/2020 7:41 pm
ignacmc
(@ignacmc)
Active Member

Yes, EEPROM Marlin Editor was the culprit!!!! Now there is no reset 😉

Posted : 02/08/2020 7:48 pm
robee liked
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