The MK3S upgrade is really a downgrade  

Re: The MK3S upgrade is really a downgrade

I'm happy your original filament sensor worked for you, but it definitely did not for an awful lot of people - me included. Endless false triggers, so much I had to disable it on both of my Prusa's a long time ago.

As far as intelligence and monitoring movement and filament jams, those "features" never actually worked at all reliably or repeatably for the majority of users. The laser filament sensor was never able to fulfil the promises made for it - it was not fit for purpose.

The Mk3S release is definitely a worthwhile upgrade, and one of its best features is that is removes the useless laser sensor and replace it with a tried and tested solution.

Re: The MK3S upgrade is really a downgrade

... it also monitors the filament movement ie: a jam and takes action....

That's a rumor. The source code is telling a different story.

Re: The MK3S upgrade is really a downgrade

Was it advertised as detecting jams? I recall run out detection being advertised (Jan 18).

Edit: Ah, look like it was, though it didn't sound too stable. I missed that!

Edit 2: Is it confirmed that the ball bearing is not being used as a motion proxy for the actual filament? It only detects runout?

Re: The MK3S upgrade is really a downgrade

Edit: Ah, look like it was, though it didn't sound too stable. I missed that!

The issue is that this sensor detects jam by looking at the filament movement in the Y-direction. Due to the natural movement of the filament during the print you're getting practically either false notifications if it's too sensitive or it doesn't detect at all. So far my MK3 didn't detect any jams with various different filaments. Though the runout functionality works fine for me.

So personally I like the MK3s upgrade because the reliability of the runout functionality got improved. I can keep the sensor active all the time and the maintenance (no need to keep it super clean) is reduced a lot.

Re: The MK3S upgrade is really a downgrade

Edit: Ah, look like it was, though it didn't sound too stable. I missed that!

The issue is that this sensor detects jam by looking at the filament movement in the Y-direction. Due to the natural movement of the filament during the print you're getting practically either false notifications if it's too sensitive or it doesn't detect at all. So far my MK3 didn't detect any jams with various different filaments. Though the runout functionality works fine for me.

So personally I like the MK3s upgrade because the reliability of the runout functionality got improved. I can keep the sensor active all the time and the maintenance (no need to keep it super clean) is reduced a lot.

the sensors were tested by the guy who makes duet wifi and monitoring movement was unstable for this purpose... worse the faster you print.

Re: The MK3S upgrade is really a downgrade

... it also monitors the filament movement ie: a jam and takes action....

That's a rumor. The source code is telling a different story.

Explain how exactly.

Re: The MK3S upgrade is really a downgrade

I’m another one who found the optical sensor to be a mixed blessing at best. The new design should be an improvement for run-out detection. Jam detection is nice but not crucial to me.

The Holy Grail for me would be a Blob of Death detector.

Re: The MK3S upgrade is really a downgrade

What bothers me is that people are waiting 10-12 weeks for such a small "hope" of something!

Some will see improvement , some wont.

Some will hope their perfect printer that already producing amazing prints improve any more!

There are solutions out there for everyone! LOOK online!

Prusa failed me. One person told me this, one person told me that, i dont forgive that, So i cancelled my order!

If your printer is already doing what you want it to do, don't take a chance!

I am doing very well with my Bondtech pancake motor upgrade attached to my aftermarket MMU2 from China!

Dont have to wait until June/July/Febtober/

I won't drink the cool-aid anymore.

Re: The MK3S upgrade is really a downgrade

[...] I won't drink the cool-aid anymore.
Care to post pics of your results?

Re: The MK3S upgrade is really a downgrade

[...] I won't drink the cool-aid anymore.
Care to post pics of your results?

Here are the pics:
Three different people telling me 3 different things
NO MORE COOL AID!
I was told " NEXT WEEK"
I took apart my printer for NOTHING.
Stand by your staff. If one of your staff says " NEXT WEEK", move the earth to make that happen!
STAND BY your mistakes!

Re: The MK3S upgrade is really a downgrade

[...] I won't drink the cool-aid anymore.
Care to post pics of your results?

Here are the pics:
Three different people telling me 3 different things
NO MORE COOL AID!

Yes, those of us who read through your venting thread understand your frustration. Please get past it.

I think Bobstro was asking about your results with the modification that you did do... I'd also be interested.

I have a couple questions about your pancake motor.
1. It has less surface area than the stock motor, there for less cooling. Do you have any issues with it getting hot (or hotter than stock)?
2. Did you have to change any max current settings for this, or is it running ok as a drop-in replacement?
3. Do you see less ringing with the less massive motor on the extruder?

Re: The MK3S upgrade is really a downgrade

Sheesh.

Edit: Don't bother. Looks like somebody else was kind enough to post pics of their results without a tantrum.