New Prusa and new features. What do you think?
I think i need to sell a kidney 
Hi
I’m excited to upgrade my mk2s for $149. Basically don’t get 24v bed, new board, and I guess that’s it? I’m happy with a 2.5 I think.
doesnt feel much of a revolution - tho i had a filament sensor for couple of years and even had one that measured the filament width and adjusted the extrusion accordingly. removed both from the printer 
had an ups on it for forever…
@Rob_Nance moving the printer from 12V to 24V made a big difference on everything for me. i wouldnt discard that as un-important!
Aside from the voltage switch, I gather the frame is different enough to make a full upgrade impractical. Lots of respectable improvements and refinements outside of that.
If you have an MK2 thats been upgraded to a Haribo 3030 the new frame should be old news
@Cristian_Nicola I know, I think the 24v is why this is the MK3, it marks a major change
The voltage is probably a big part of it- the Trinamic drivers they use don’t work well on 12V.
24V needs to become the norm in my opinion. Unless you have a bunch of 12V PSU’s around, I don’t see the reason why you wouldn’t go 24.
The frame is another huge improvement to me. Love that people don’t have to fiddle around with squaring it up again.
If I had the money I would be a buyer. It’s getting up there in price but still a good value IMO.
Good job, Prusa! I love the constant march forward. These are great improvements… moving the dial
Brook
I’m curious about how to implement homing without an end-stop sensor?
Stall detection?
@Xiaojun_Liu I understand it’s a feature of the Trinamic drivers, so yes – stall detection (current monitoring).
CANI (constant and never ending improvement) is the way to high quality if you ask me. I’m happy to see Prusa not resting on their success, but rather making constant smaller improvements whenever possible, driving the whole game down the field.
I much prefer this style of product development over the “rushing to be first” spectacular (usually on paper) quantum leap forward.
My only gripe as it were, is the use of 2 motors, not mechanically linked, on the Z axis, the primary cause of alignment issues when they go out of sync.
I’m no mechanical engineer, but doesn’t that lead to new challenges? Have you had problems with the Z axis on the MK2 or MK2s, or do you just mean in general? I’ve never had a problem with them, but I imagine if you had hands around they could be bumped. Is that the primary concern?
So long as you keep it switched on it’s not a concern in my experience, and I print a great deal. They stay perfectly in synch.
Ive had problems a few times but I don’t have that kind of machine. If one side jams hard you can get a skew. This was on a MendelMax 2 where a bed glass was over too far and a screw head interfered with homing and stalled the motor on one side. One major alternative is to use a belt to relay to the other screw, which adds a few more line items to the BOM. I think most people do well enough with unlinked z screws.
As a printer designer, that designed a 2-motor z setup in my printrbot plus, over time, you start to target even small improvements to take any nuance out of the experience. Simple for the end user is sometimes more complicated to design. The payoff is it opens the audience to less experienced people and overcomes edge cases that have bitten us all from time to time. The pursuit of the “perfect” machine becomes a bigger challenge than the cheapest or most basic… the “good enough”.
I don’t want to drive a car with an automatic transmission but it makes driving easier and more enjoyable for many.
I’ll go to my grave driving a stick shift, but many can’t relate. That doesn’t sell.
Brook
@Brook_Drumm glad I’m not the only one who is still adamant to drive stick.
Not that I’ve ever designed anything to the scale/quality of either of you guys, the few printers that I have designed were much harder to do than I expected.