Prusa Mini and Octoprint  

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herbert
(@herbert)
Trusted Member

Hi,

is there an collection of information about Octoprint and the Prusa Mini ?

I found some articles and posts, but not sure what is working and what is not working?
I would like to collect information if not yet existing, but only if some people can verify the information too.

 

Perhaps we could make a good resource out of this, for newbies in Octoprint and the Prusa Mini to start with and get the things going.

I am still looking for a good writeup how to the Octoprint setup with the Prusa Mini correctly and get the settings done right to do the first print.

Posted : 30/04/2020 8:18 am
kevman
(@kevman)
Estimable Member

I've setup OctoPi (Octoprint running on  Raspberry Pi B ) sucesssfully with no tweaks out of the box and it works great. The only minor annoyance I have is htat I have ot manually go nad turn on the printer but I might hook it up to a wifi outlet in the future. I haven't explored any plugins yet.

Posted : 01/05/2020 2:11 pm
dhaya
(@dhaya)
Active Member

If I may, here are 2 more tips for PrusaSlicer users:

  • add a -4 offset on the Y bounding box in the printer profile to remove warning before each print sliced with PrusaSlicer (the purge line is printed just outside the printable volume)
  • PrusaSlicer Thumbnails is a plugin for Octoprint that displays a print’s embedded thumbnail in the file list

Also, I tried fiddling with Octolapse but could not set it up properly, so if someone has succeeded and could share the right settings, that would be awesome!

Posted : 03/05/2020 12:55 am
japu liked
herbert
(@herbert)
Trusted Member

@kevman

I am using a Sonoff S20 with Tasmota running on it and the Tasmota Plugin for Ocotoprint

And it works perfect, switching off the printer after a print has finished

Posted : 04/05/2020 7:00 am
herbert
(@herbert)
Trusted Member

@dhaya

The offset is something I need to test.
I switched of the Enable model size detection and warn if model exceeds print bed feature, I got errors everytime uploading a gcode - is this related to the purge line ?

Posted : 04/05/2020 7:02 am
dhaya
(@dhaya)
Active Member

@herbert

This is right. With the offset defined you can leave the feature on. It will not trigger the warning for the purge line and will work as intended when trying to print objects larger than 180 x 180 x 180.

Posted : 04/05/2020 9:27 am
herbert
(@herbert)
Trusted Member

@dhaya

I am too stupid finding this "offset" setting in octoprint 🙂 perhaps you can help me a little 😀

Posted : 06/05/2020 9:46 am
dhaya
(@dhaya)
Active Member

The settings are in the "Print bed & build volume" tab, shown when the "Custom bounding box" input is checked.

Posted : 06/05/2020 9:51 am
cmumford liked
kevman
(@kevman)
Estimable Member

In the spirit of keeping this thread informative, what are the correct feedrates?  there are two sets of numbers in the other thread. Also are any of you using and custom G-code scripts post print as referenced on the other threads ? 

Posted : 06/05/2020 2:28 pm
herbert
(@herbert)
Trusted Member

@kevman

actually this is a good question. would also be interested.

Posted : 12/05/2020 10:56 am
dhaya
(@dhaya)
Active Member

Hi, the correct feedrates are the following:

That would make the info to feed into the Axes tab:

  • X: 10800 mm/min
  • Y: 10800 mm/min
  • Z: 720 mm/min
  • E: 4800 mm/min

Based on the maximum feedrates of 180, 180, 12, and 80 from the "Machine limits" menu under "Printer settings" in the latest PrusaSlicer.

I use the following custom end G-code:

{if layer_z < max_print_height}G1 Z{z_offset+min(layer_z+140, max_print_height)}{endif} F720 ; Move print head up
G1 X0 Y180 F4200 ; park print head

(basically, it moves the Z-axis way up to make it easier to remove the build plate without hitting the nozzle, and the X-axis to the left, giving a softer curve on the bowden tube and lessening the probability of the filament breaking inside it).

Posted : 12/05/2020 12:29 pm
cmumford liked
kevman
(@kevman)
Estimable Member
Posted by: @dhaya

Hi, the correct feedrates are the following:

That would make the info to feed into the Axes tab:

  • X: 10800 mm/min
  • Y: 10800 mm/min
  • Z: 720 mm/min
  • E: 4800 mm/min

Based on the maximum feedrates of 180, 180, 12, and 80 from the "Machine limits" menu under "Printer settings" in the latest PrusaSlicer.

I use the following custom end G-code:

{if layer_z < max_print_height}G1 Z{z_offset+min(layer_z+140, max_print_height)}{endif} F720 ; Move print head up
G1 X0 Y180 F4200 ; park print head

(basically, it moves the Z-axis way up to make it easier to remove the build plate without hitting the nozzle, and the X-axis to the left, giving a softer curve on the bowden tube and lessening the probability of the filament breaking inside it).

This is great! I love the G-code idea. Thanks!

Posted : 12/05/2020 2:54 pm
kevman
(@kevman)
Estimable Member

for some reason that code didn't move my z up like i expected. code looks right to me. 

Posted : 12/05/2020 8:34 pm
kevman
(@kevman)
Estimable Member
Posted by: @dhaya

Hi, the correct feedrates are the following:

That would make the info to feed into the Axes tab:

  • X: 10800 mm/min
  • Y: 10800 mm/min
  • Z: 720 mm/min
  • E: 4800 mm/min

Based on the maximum feedrates of 180, 180, 12, and 80 from the "Machine limits" menu under "Printer settings" in the latest PrusaSlicer.

I use the following custom end G-code:

{if layer_z < max_print_height}G1 Z{z_offset+min(layer_z+140, max_print_height)}{endif} F720 ; Move print head up
G1 X0 Y180 F4200 ; park print head

(basically, it moves the Z-axis way up to make it easier to remove the build plate without hitting the nozzle, and the X-axis to the left, giving a softer curve on the bowden tube and lessening the probability of the filament breaking inside it).

So I made a typo in the feed rates on configuration and mad x to be 18000 by mistake, Would this cause any issues ? I noticed alot more extruder gear clicking lately. My understanding is htat max number should not affect actual prints.

This post was modified 4 months ago by kevman
Posted : 18/05/2020 9:24 pm
leslie.h2
(@leslie-h2)
New Member

@kevman

Where did you locate the cabel information? I understand it is an additional cable in the electronics box. Is that incorrect?

Posted : 29/05/2020 11:52 pm
Vookimedlo
(@vookimedlo)
New Member

I made the OctoPrint plugin for getting the more accurate ETA. Maybe you can find it useful.

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

 

Posted : 22/06/2020 9:57 pm
herbert liked
mike-io
(@mike-io)
Active Member

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.
Posted : 25/06/2020 10:57 pm
herbert
(@herbert)
Trusted Member

@mike-io

some reported issues with the USB cabling. Seems that if the Micro USB connector is not deep enough into the jack or just to small it does not work. Try another USB cable.

This would be my suggestion.

Posted : 26/06/2020 6:47 am
StephenSmith
(@stephensmith)
Eminent Member
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..

Posted : 26/06/2020 9:13 am
herbert
(@herbert)
Trusted Member

Yeah, I think the biggest issue is the PIN length because of how the buddy board and the housing are aligned. Try to use a good quality cable, they should have long enough PINs and a long enough connector to push it in, until it clicks.

Posted : 26/06/2020 9:15 am
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