Rotated cutter
Where to begin... If I had a big hammer near here, the MMU unit would have been already shattered. I am very used to unreliable piece of crap called MK3 (0.1 success ratio), but I somehow hoped the so long developed MMU 2.0 will just work. What a naivety.
Let's begin with the cutter. It is tightened against nothing. There is just a symbolic trace at the printed part to see where to put it, before it finds its way somewhere else. Prepare half an hour to realign it, just to use it once and it is out again. Why they didn't secured it properly? Whey they didn't use a blade that can be fixed? Actually all the blades out there has a part with a hole, that prusas could use. ( https://www.google.com/search?q=cutter+blade ).
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Re: Rotated cutter
Happened to me as well, but only after the selector jammed and I forced it in the wrong direction.
Remove the blade; it is not used at present - and I don't think it will ever be much use due to its single-direction nature.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Rotated cutter
I think if the selector goes all the way to empty slot on the right before it goes to a left filament it'll work good. Only way i see it working.
Re: Rotated cutter
I think if the selector goes all the way to empty slot on the right before it goes to a left filament it'll work good. Only way i see it working.
If the printer is working correctly, there will be no need for the blade (and I don't see it being implemented anytime soon).
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Rotated cutter
In my fantasy land, some combination of existing sensors and repeats would allow you to spot a bad tip, and trim as needed.
Once the key variables in ramming settings get worked out so you only adjust one or two things, it'll be a lot easier to fix.
I removed my blade yesterday and I feel it's been beneficial.
I maintain an informal list of San Diego, CA 3D printing enthusiasts. PM me for details. If you include a contact email and I can add you to the informal mailing list.
Re: Rotated cutter
In my fantasy land, some combination of existing sensors and repeats would allow you to spot a bad tip, and trim as needed.
Once the key variables in ramming settings get worked out so you only adjust one or two things, it'll be a lot easier to fix.
I removed my blade yesterday and I feel it's been beneficial.
But much better to resolve the actual problem than fix the symptoms.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Rotated cutter
Hence my wanting to boil down the ramming settings to something manageable.
A test procedure would go a long way towards getting those tuned. Just printing a wipe tower, and ejecting the filament each time for inspection.
I maintain an informal list of San Diego, CA 3D printing enthusiasts. PM me for details. If you include a contact email and I can add you to the informal mailing list.
Re: Rotated cutter
Hence my wanting to boil down the ramming settings to something manageable.
Personally, I think ramming is overly complicated.
For PLA, I just ram 13 to 15 mm^3 at 90% of maximum feed (therefore ~ 10mm^3/s) with the heater turned off.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…