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Print speed increase with MK3.5?  

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Joey
 Joey
(@joey-4)
New Member
Print speed increase with MK3.5?

Hi guys,

I am currently very happy with my MK3S+ (super reliable, silent, perfect quality), but I saw the possible upgrade to MK3.5 and am interested in the increase in print speed. In the blog it says that the MK4 will be up to 70% faster than the MK3. Will I also achieve +70% with just the MK3.5 upgrade? I assume that the increase is resulting from the 32bit board and the better firmware? Or will I also need the new Nextruder?

If I can achieve similar print speed increase with MK3.5 I do not really see the point of upgrading to MK4 for my use case (hobby printing), but would be happy to spend the approx 250 bucks for the increase in print speed.

Thanks for you help!

Veröffentlicht : 31/03/2023 3:24 pm
D0MINGU35
(@d0mingu35)
New Member
RE: Print speed increase with MK3.5?

In thesis yes, due to the “input shaper” the print can move faster without losing quality.  Input shaping consists in creating some “counter” movements in order to dump the vibrations of your machine. Prusa strategy is to make it “hardcoded” which means that you don’t have any sensor in the printer to measure vibrations and they assume that every printer resonates in an equal way, and since this is an open-source platform, of course, there are a lot of modified machines.

 

Very curious to see the results in the first guys that make the MK3s+ to MK3.5 upgrade…..

Veröffentlicht : 31/03/2023 4:08 pm
burtronix gefällt das
cwbullet
(@cwbullet)
Mitglied
RE: Print speed increase with MK3.5?

I am the same.  I want to see someone report back on the upgrade before  I do one.  

Posted by: @d0mingu35

In thesis yes, due to the “input shaper” the print can move faster without losing quality.  Input shaping consists in creating some “counter” movements in order to dump the vibrations of your machine. Prusa strategy is to make it “hardcoded” which means that you don’t have any sensor in the printer to measure vibrations and they assume that every printer resonates in an equal way, and since this is an open-source platform, of course, there are a lot of modified machines.

 

Very curious to see the results in the first guys that make the MK3s+ to MK3.5 upgrade…..

 

--------------------
Chuck H
3D Printer Review Blog

Veröffentlicht : 31/03/2023 4:25 pm
Joey
 Joey
(@joey-4)
New Member
Themenstarter answered:
RE: Print speed increase with MK3.5?

Ok, I am curious to see how that hardcoding works out. I would assume that the resonance/vibrations also depend on the surface the printer is stitting on, so a concrete slab has probably different vibrations than a Lack table.

Veröffentlicht : 31/03/2023 5:39 pm
beegmouse
(@beegmouse)
Eminent Member
RE: Print speed increase with MK3.5?

I'd like to know know this.

I'm running an MK3 with octopi and revo nozzles.

As a result the upgrade paths don't get me as much benefit. If a 3.5 can still improve my speed that might be worth it. But the rest not so much.

 

Veröffentlicht : 04/04/2023 8:21 am
Teraflop
(@teraflop)
New Member
RE: Print speed increase with MK3.5?

I purchased the MK3+ to MK4 upgrade and then cancelled it after watching the YouTube video .   If you look at timestamp 5:05 and 32:12, you will hear Joseph Prusa discuss the new High-Flow Extruder coming soon.  Joseph plans to upgrade his M3 printer farm to M4s and then upgrade these M4s with the new High-Flow Extruder.  If I upgrade to the MK4 now, I will install a new extruder that comes with the kit.  I will soon need to purchase the High-Flow extruder and dispose of the new one I just bought with the MK4 upgrade.  What exactly is the upgrade path from the MK3S+ to the MK4 (or a new MK4 just purchased) with the High-Flow Extruder that is coming soon?  How much will this cost?  Extruders are not cheap.

Veröffentlicht : 04/04/2023 3:50 pm
XGZ
 XGZ
(@xgz)
New Member
RE: Print speed increase with MK3.5?

 

Posted by: @teraflop

I purchased the MK3+ to MK4 upgrade and then cancelled it after watching the YouTube video .   If you look at timestamp 5:05 and 32:12, you will hear Joseph Prusa discuss the new High-Flow Extruder coming soon.  Joseph plans to upgrade his M3 printer farm to M4s and then upgrade these M4s with the new High-Flow Extruder.  If I upgrade to the MK4 now, I will install a new extruder that comes with the kit.  I will soon need to purchase the High-Flow extruder and dispose of the new one I just bought with the MK4 upgrade.  What exactly is the upgrade path from the MK3S+ to the MK4 (or a new MK4 just purchased) with the High-Flow Extruder that is coming soon?  How much will this cost?  Extruders are not cheap.

extruder shouldnt change, it would be a high flow hotend that would change. that extruder has enough push force to go well above any flow  thats going to be available on any hotend prusa is going to ship, dont need to look any further than competing planetary designs like orbiter to figure that out.  On the mk4 the hotend swaps in/out along with the nozzle that has that integrated heatbreak. its likely to have something like an extended length block like a volcano with a longer nozzle/heatbreak assembly thing to accommodate it with the nozzle being taller like a volcano probably- as higher flow is going to require a longer meltzone. this should probably be trivial on a mk4 like swapping a nozzle and moving the thermister and heater core into a new block. like swapping the heater and thermister electrics, which is also easy with the breakout pcb pulling two cables out of a plug.  i dont know this, or how prusa plans to approach this, but they cant fight physics, so its pretty probable this is the direction they would take as its the most dead simple easiest way to implement. 

Veröffentlicht : 05/04/2023 2:56 pm
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