How does one disable "No Ooze" Temps in Prusa 2.9.2?
Running into this problem after upgrading to Prusa 2.9.2. The printer automatically adds "no ooze" settings prior to bed leveling. Well, this effectively breaks the fire-and-forget print process, since the extruder now *always* fails at the "clean nozzle" step, and never starts printing.
I was thinking this was due to the generic PETG filament profile, but I don't see anything in the filament section related to this.
How do I disable these settings, or am I missing something in the filament profile?
RE: How does one disable "No Ooze" Temps in Prusa 2.9.2?
Found the configuration option in [Print Settings] > [Multiple-Extruders] > [Ooze Prevention].
RE: How does one disable "No Ooze" Temps in Prusa 2.9.2?
Nope, disabling ooze prevention did not fix the problem. The PETG profile continues to attempt (and fail) nozzle cleaning at 175C.
RE: How does one disable "No Ooze" Temps in Prusa 2.9.2?
Is the nozzle clean? If not heat it to 230 and scrub it with a brass brush. PETG tends to build up on the nozzle.
I'm not sure what the no ooze thing your describing is, but the nozzle has always probed the bed at 175. I know they were looking at adding extra retraction at the end of prints to help with oozing, but that shouldn't have affected the start of the print.
RE: How does one disable "No Ooze" Temps in Prusa 2.9.2?
In order to *successfully* get a PETG print going, I:
- Send the GCode to the printer from Prusa Slicer
- Walk over to the printer and sit in front of it until the bed heats
- While it is absorbing heat, I tune the nozzle temp from 175C to 240C
- Everything proceeds normally, and it prints fine
A borked print:
- Send the GCODE over
- Bed heats to 80
- good
- Nozzle heats to 175
- ok...
- Probes bed once
- Absorbs heat for 7 min
- ok, to get the enclosure toasty, got it
- Proceeds to "Nozzle cleaning" at 175C
- Expected: fully heated to 240, all the accumulated pressure from the last print oozes out in a tight collection of approx 6-24 tightly clustered dots
- Instead: nozzle does 4-5 rows of 12 tight probes, bouncing the globule of slightly gooey 175C PETG on the tip of the nozzle, then fails
- 5 hours later, I come down to find my 1hr print idling at the failure point
- Nozzle is at 175 still
- Bed is at 80
This behavior isn't configurable AFAI can tell... It only appeared somewhere while upgrading both the firmware and prusa install to the latest. Not sure which it is without regressing. Fully prepared to manually hit the happy path; prefer to upgrade my way out of this spot.
But perhaps there is a configuration in Prusa or on the machine that I don't know about?