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Prusa Mk3 - 3.5 (or 3.9 or 4) upgrade  

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dcorbin13
(@dcorbin13)
Eminent Member
Prusa Mk3 - 3.5 (or 3.9 or 4) upgrade

Does the upgrade kit include an entirely new hot end?  I've torn my wires again after a particularly bad print failure "glob-o-plastic" on the head.  So, I need a new hot end, but if the upgrade includes one....

Posted : 19/05/2024 11:37 am
ChrisG
(@chrisg)
Member
RE:

Hi,

I use a Revo hotend on the MK3.5. I am very happy with the result.

Here are a few examples https://www.printables.com/model/880350-addon.

It is cheaper then a complete upgrade

 

Chris

This post was modified 4 weeks ago by ChrisG
Posted : 19/05/2024 12:15 pm
d_c_h_w
(@d_c_h_w)
Active Member
RE: Prusa Mk3 - 3.5 (or 3.9 or 4) upgrade

For 3.5 , the hotend is just re-used, so a new one is not included. For 3.9 and 4.0 the hotend and extruder are re-designed (nextruder) so are included.

Note also if you go down the 3.5 route, there is currently no upgrade path to 3.9 or 4.0 from 3.5, so maybe another thing to consider.

Posted : 20/05/2024 3:10 pm
Allen8355
(@allen8355)
Estimable Member
RE: Prusa Mk3 - 3.5 (or 3.9 or 4) upgrade

The REVO hotend is better than the original hotend, but its actually better than the MK4/XL hotend as well, and it heats up twice as fast as the MK4/XL hotend. 

Posted : 12/06/2024 9:33 pm
ChrisG
(@chrisg)
Member
RE: Prusa Mk3 - 3.5 (or 3.9 or 4) upgrade

I don't know if it faster. It is faster then the old hotend as the MK3s. I wish I could go back to my Bondtech with Mosquito but it is not possible yet. 

Posted : 13/06/2024 7:55 am
Allen8355
(@allen8355)
Estimable Member
RE: Prusa Mk3 - 3.5 (or 3.9 or 4) upgrade

If you look at the MK4/XL hotend, its just a big hunk of metal with a thermistor and heater like 3D printers have been using for 10 years. That is a mass that takes time to heat. The Revo is different. It has a HTPC ceramic heater, and there is no big block. It heats very quick.  In fact it heats so fast that Prusa had to tweak their FW because the printer would report an error.  

Posted : 13/06/2024 8:29 am
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