RE: 6.4.0-RC Firmware for Prusa CORE One
Tread carefully... this is an emotional topic for Steve. 😉
IDK. Don't shoot the messenger maybe?
I think the bug before was that if you change the filament and for whatever reason you needed to try again, the bed would move down again. That's why it is supposed to auto home first on a filament change. Unless I'm missing something...
RE: 6.4.0-RC Firmware for Prusa CORE One
Ok, I just stopped a print because some ninjaflex was under extruding and the the x carriage crashed into the left side when parking the extruder. Back to 6.2.6 for me.
RE: 6.4.0-RC Firmware for Prusa CORE One
Ok, I just stopped a print because some ninjaflex was under extruding and the the x carriage crashed into the left side when parking the extruder. Back to 6.2.6 for me.
This doesn't seem like an edge case either. Looks like the XL needs more testing.
RE: 6.4.0-RC Firmware for Prusa CORE One
Ok, I just stopped a print because some ninjaflex was under extruding and the the x carriage crashed into the left side when parking the extruder. Back to 6.2.6 for me.
Ive had something similar on Core One.
Would appreciate if someone else with a C1 could test this also... start a print, then cancel it after a couple of layers...does the extruder hit the back corner and skip a few steps where it should normally park ?
I've noticed it do this once on the last RC, now I've just seen it on this latest version. Initially I put it down to some gcode I've been manually editing, now it's just done it on a standard, untouched print from Prusaslicer.
RE: 6.4.0-RC Firmware for Prusa CORE One
I haven't. I need to actually get a fresh set of batteries for my caliper. I've not ever had a problem with PLA requring me to fiddle with extrusion multiplier for it. PETG on the other hand I'm almost never able to use 1.0 and usually end up at like .97 or lower. When I use a new brand of PETG I expect to have to fiddle with the extrusion multiplier. I guess there's a first time for everything.
I am fairly new to 3D printing. QUESTION: How do you know when you need to adjust the extrusion multiplier? Is there a print defect that you look for, or is there some test print people are doing that covers a range of multipliers, similar to a temperature tower?
Cheers,
Neal
RE:
I haven't. I need to actually get a fresh set of batteries for my caliper. I've not ever had a problem with PLA requring me to fiddle with extrusion multiplier for it. PETG on the other hand I'm almost never able to use 1.0 and usually end up at like .97 or lower. When I use a new brand of PETG I expect to have to fiddle with the extrusion multiplier. I guess there's a first time for everything.
I am fairly new to 3D printing. QUESTION: How do you know when you need to adjust the extrusion multiplier? Is there a print defect that you look for, or is there some test print people are doing that covers a range of multipliers, similar to a temperature tower?
Cheers,
Neal
You can do the Prusa extrusion multiplier test, which is basically an open top, hollow cube printed in vase mode, so the wall is only one perimeter thick.
With standard PS settings the wall should be 0.45mm.
You need high quality calipers, or a micrometer is better. If your walls are above 0.45 you need to decrease the EM, if your walls are under 0.45mm you need to increase your EM.
Having the correct EM means that your parts will have better dimensional accuracy, Top/bottom layers will appear cleaner as there shouldn't be any over or under extrusion.
https://help.prusa3d.com/article/extrusion-multiplier-calibration_2257
RE: 6.4.0-RC Firmware for Prusa CORE One
Another way (which is what I do) is install OrcaSlicer and run the built-in calibration tests. You can also download these from Printables and run them through PrusaSlicer but OrcaSlicer makes it easier to set them up.
RE:
Ok, I just stopped a print because some ninjaflex was under extruding and the the x carriage crashed into the left side when parking the extruder. Back to 6.2.6 for me.
Ive had something similar on Core One.
Would appreciate if someone else with a C1 could test this also... start a print, then cancel it after a couple of layers...does the extruder hit the back corner and skip a few steps where it should normally park ?
I've noticed it do this once on the last RC, now I've just seen it on this latest version. Initially I put it down to some gcode I've been manually editing, now it's just done it on a standard, untouched print from Prusaslicer.
Interesting. I recall seeing this after I stopped a print a couple of weeks back but didn't pay attention to it at the time. There is no major difference between the release and RC2 except for some changes around crash recovery which wouldn't be related. So final and RC2 should exhibit the same behavior. I'll try it out and report back.
RE: 6.4.0-RC Firmware for Prusa CORE One
I haven't. I need to actually get a fresh set of batteries for my caliper. I've not ever had a problem with PLA requring me to fiddle with extrusion multiplier for it. PETG on the other hand I'm almost never able to use 1.0 and usually end up at like .97 or lower. When I use a new brand of PETG I expect to have to fiddle with the extrusion multiplier. I guess there's a first time for everything.
I am fairly new to 3D printing. QUESTION: How do you know when you need to adjust the extrusion multiplier? Is there a print defect that you look for, or is there some test print people are doing that covers a range of multipliers, similar to a temperature tower?
Cheers,
Neal
@gb160's recommendation is a good test. Another you can try but I find difficult to interpret sometimes is the YOLO test. You can find it in OrcaSlicer with a description of the tests here: https://github.com/OrcaSlicer/OrcaSlicer/wiki/Calibration
RE: 6.4.0-RC Firmware for Prusa CORE One
@gb160 I wonder if what you are seeing on the C1 is the same (or related) to what is happening on the XL: https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4984