Prusa Mini and Octoprint  

RE: Prusa Mini and Octoprint

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.

RE: Prusa Mini and Octoprint

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!

RE: Prusa Mini and Octoprint

@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

RE: Prusa Mini and Octoprint

@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 ?

RE: Prusa Mini and Octoprint

@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.

RE: Prusa Mini and Octoprint

@dhaya

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

RE: Prusa Mini and Octoprint

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

RE: Prusa Mini and Octoprint

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 ? 

RE: Prusa Mini and Octoprint

@kevman

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

RE: Prusa Mini and Octoprint

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).

RE: Prusa Mini and Octoprint

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!

RE: Prusa Mini and Octoprint

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

RE: Prusa Mini and Octoprint

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.

RE: Prusa Mini and Octoprint

@kevman

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

RE: Prusa Mini and Octoprint

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/

RE: Prusa Mini and Octoprint

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.

RE: Prusa Mini and Octoprint

@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.

RE: Prusa Mini and Octoprint

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..

RE: Prusa Mini and Octoprint

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.