OctoPrint issues and tips  

RE: OctoPrint issues and tips

Hey everyone,

I recently got a MK3S. I have several other printers running on octopi-Instances in Pi3B+ or zeroW (without camera). I'd like to add the camera feature on my MK3S, but i also like the zeroW Port. Can i drive the Pi3B+ from the Einsy-Connector or is it not powerful enough? And: which connection is "faster"? The direct serial connection or the USB-to-serial connection?

Couldn't find any information up till now...

RE: OctoPrint issues and tips

Nevermind. The 5V DCDC of the Einsy only supplies 2A, So i guess i have to add another DCDC-Converter

RE: OctoPrint issues and tips

or an external DC supply, it's nice to have the octoprint available even when the printer is off

RE: OctoPrint issues and tips

Posted by: herbie_kl

Nevermind. The 5V DCDC of the Einsy only supplies 2A, So i guess i have to add another DCDC-Converter

It's never a good idea to have your means of monitoring equipment dependent on that equipment. A separate power supply is always the best approach.

RE: OctoPrint issues and tips

Tip:

If you have not tried Prusa Slicer direct to Octoprint - you are missing a treat.

Define your Octoprint address in Prusa Slicer Settings / General.

Now when you slice an object, you have a Send option with a Load and Print option which will send your GCode to Octoprint - and start the print.

Spiffier than sliced bread. But then I like bread.

RE: OctoPrint issues and tips

see if you can search one of my older replies to connecting the pi3 to the einsy header, the main deal is, you can connect to the einsy header, you must NOT connect the 5V pin, but you MUST connect the ground pin, it's a reference. from there you can plug in the pi power from a wall wart plug with no issues.

take your time to be sure you match the pins correctly. 

I have printed exclusively from octoprint this way since the day I installed it, don't even know where the SD card that came with the printer is.

I may make a post on my web page about this. 

RE: OctoPrint issues and tips

Yep common ground.

RE: OctoPrint issues and tips

Hi all,

Hoping some of you can help me troubleshoot this one. My i3 MK3 was printing a few objects fine until it suddenly wasn't. Pictured is the previous success print amongst subsequent bad prints. We have attempted wiping of the steel plate as well as multiple recalibrations of the Z-axis/zero, as well as the handbook recommended 75% print speed. The print starts off adhering to the plate but would move some time afterwards to produce the failed prints as pictured.

- FW version: 3.8.1
- RPi used
- Method of the connection : Tried Pi and SD
- Filament sensor ON
- Crash detection ON

Would appreciate any help beyond the wipe/reclibrating to stop producing print gunk midway.

Gunks with a successful attempt:

RE: OctoPrint issues and tips

I am afraid you are in the wrong topic...

Adhesion problems (which this is) are never caused by using a Pi. And I don't use Never lightly.

Refer to the topics on adjusting Z and adhesion. Type of build plate you are using should also be mentioned.

RE: OctoPrint issues and tips

Octopi has been updated to .17 now.  The image prusaprint is still using .15 .   Anyway we can get an updated image from ya'll? 

RE: OctoPrint issues and tips

Hello

I want to use octoprint over a mobile phone hotspot (since no WIFI available)

newest firmware, raspberry pi w Zero

it does not work.. no IP shows up on the printer. is it possivle that it does not work on a mobile hotspot?

Andri

RE: OctoPrint issues and tips

ah good sorry, can not delete anymore.. there was something wrong with the bootloader.. i flashed it again and now it works

RE: OctoPrint issues and tips

Posted by: @bobstro

 

It's never a good idea to have your means of monitoring equipment dependent on that equipment. A separate power supply is always the best approach.

Well... i don't see any practical use in above claim...

the point is, that if 24V Prusa power supply fails and you have octoprint still available you can't do anything anyway. So, it's quite the same if you use 24V PSU and DC-DC converter for Pi power supply. That way if Pi won't be online you will know that either:

- Pi  (or your router, ISP....) locked up and needs to be reset, which can happen on any power supply;

- 24V Prusa PSU has died. Nothing to be done even if Pi was online...

RE: OctoPrint issues and tips

@protoncek

Depends on what you have setup. If you have a camera, enclosure sensors, file server on the Pi that in general you would want the Pi to stay on even when the printer is off. Or for example, what if the power supply shorts and starts a fire or something terrible. The whole system will go down, and you will not know. But if the Pi is powered separately you could get a warning that the printer is not responding, or the temp went up, and check the camera.

I agree with @bobstro it's generally better to not have it connected to power.

If it's a Pi Zero and it's pretty much a dumb server that just accepts files and prints then that's a different story. 

RE: OctoPrint issues and tips

You have the point here, sure if pi is more than just dumb interface and it’s on 24/7.
Although i would rather trust fire sensor for potential fire warning. Namely, fire can start either in prusa PSU or in separate Pi PSU, so you’re appr. 50/50 here. I have a smoke sensor connected to burglar alarm system. 
oh, i also have independent fisheye camera in my workshop, so i’m covered... 😉 

RE: OctoPrint issues and tips

Posted by: @protoncek

Well... i don't see any practical use in above claim...

It's a fundamental principle in network monitoring. If you lose the ability to gather diagnostic information on a failure, your ability to manage is diminished.

the point is, that if 24V Prusa power supply fails and you have octoprint still available you can't do anything anyway. So, it's quite the same if you use 24V PSU and DC-DC converter for Pi power supply. That way if Pi won't be online you will know that either:

If a defective 3D printer power supply is starting to smoke, I'd sure like to be able to see and detect it remotely, whether to just run downstairs to look, or remotely trigger an IoT power outlet. In your scenario, the video feed and any other sensors wired to the RPi would just drop and you wouldn't know why, leaving you in the unfortunate circumstance of being responsible late at night and going downstairs to look, or hoping it's not a big deal. There are also logs and other diagnostic information that can be lost if the RPi just shuts off abruptly. 

There's also the issue of the Mk3 power supply being marginal for some situations. If your 3D printer is really busy at the same time as your RPi -- you're printing a detailed part with circular surfaces and lots of corresponding moves -- your RPi power demand may spike at the same time as your printer's, leading to quality issues even if not failures.

RE: OctoPrint issues and tips

Well, i wouldn't (and i don't) trust my house (against fire) to simple web camera. The point is that for your story to work you must watch pi camera practically 24/7. If printer starts to smoke and you don't look at the camera at that moment then it's the same as you don't have it. That's why (as i said) i have real smoke detector, connected to my burglar alarm which will immediately trigger horn and send SMS to me. And if you look the videos of making Prusa enclosure you'll always find smoke detector inside.

Ok, if you use Pi also for other purposes that's another story, then separate PSU is totally logical.

As goes for consumption: if i load my SMPS module with 2A (at 5V) then current on 24V side is less than half ampere. Printer definitely has 0.5A of reserve, otherwise it's current protection would take action too often.  Of course, 2A is practically never drawn in Pi, so even smaller current is flowing on 24V side, not even worth of mentioning.

RE: OctoPrint issues and tips

Posted by: @robert-rmm200

Tip:

If you have not tried Prusa Slicer direct to Octoprint - you are missing a treat.

Define your Octoprint address in Prusa Slicer Settings / General.

Now when you slice an object, you have a Send option with a Load and Print option which will send your GCode to Octoprint - and start the print.

Spiffier than sliced bread. But then I like bread.

Is this still available?  I can't see where to add this info.  Can you post a screen shot?

RE: OctoPrint issues and tips

Prusa slicer --> Printer settings --> General --> host Type=octoprint, hostname, IP or URL=IP of your octoprint, API key=API key of your octoprint. Click test and if you entered all correctly it should say passed or ok.

Then additional icon will show up right of "export G code" on bottom right corner.

Of course you must save edited profile as your own, because default profiles can't be changed (this is kinda stupid, but....)

RE: OctoPrint issues and tips

Posted by: @josefprusa

Hi, I am making this sticky thread to gather all the issues with OctoPrint so we can do it as quickly as possible.

When you are reporting please mention:
- FW version
- RPi used
- Method of the connection - USB/expansion port
- Filament sensor on/off
- Crash detection on/off

5. Jan
------------
So we have been able to replicate the issues in the office and probably point down the issue into the poor AVR serial buffer coupled with the massive overhead of all the features. LinearAdvance is causing the serial timing problems, it will probably need to be rewritten in assembler best mask. We have a build with it disabled and it seems to solve the thing so far. Please note: LA doesn't have such a big effect on the MK3 as it did on the MK2, so there is no decrease in print quality, you will see for yourself.

We made the build 143e for you to test it out. I am putting it just here and please be cautious and monitor the printer. You must either factory reset the printer or run M502 gcode followed by M500.

19. Feb
------------
We've prepared several guides to help you with Raspberry Pi Zero W and Original Prusa i3

1. How to install Raspberry Pi Zero W to your MK3

2. How to download or create your own RPi Zero W OctoPrint image

3. How to see the IP address on your printer's screen

i will try with this!