Replacing Prusa Mini Heater Cartridge  

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charlesnramsay
(@charlesnramsay)
Active Member

Waiting for my Prusa Mini heater cartridge to arrive.  My printer could not keep temperature after a 2 day print with PETG. I hope the cartridge arrives with the proper size wrench to remove the blown cartridge.  I don't even know what size it is.  I'm positive it was not in included in the assembly kit. Does anyone know what size it is?

Best Answer by bobcousins:

Posted by: @charlesnramsay

Waiting for my Prusa Mini heater cartridge to arrive.  My printer could not keep temperature after a 2 day print with PETG. I hope the cartridge arrives with the proper size wrench to remove the blown cartridge.  I don't even know what size it is.  I'm positive it was not in included in the assembly kit. Does anyone know what size it is?

I believe it's 2mm.

My heater cartridge failed completely on the second print, but if the heater apparently fails to maintain a temperature, it could also be a problem with the thermistor.

Posted : 11/04/2020 5:06 pm
christopher.s50
(@christopher-s50)
New Member

Did you try putting a silicone sock on it? I wouldn't expect your replacement cartridge to keep up either

Posted : 12/04/2020 1:02 am
charlesnramsay
(@charlesnramsay)
Active Member

I think the new heater cartridge will do the trick. I had well over 130 hours on the printer. All of the prints were excellent. My problem was printing PETG  for 48 hours straight. Prior to that my printer kept a steady temperature. Today I tried bringing the temperature up to 280c. The printer could not maintain the temperature and after a few minutes fluctuations were as much as 12 degrees.  I think a “real” E3D heater cartridge should get me up and running.

Posted : 12/04/2020 1:18 am
bobcousins
(@bobcousins)
Estimable Member
Posted by: @charlesnramsay

Waiting for my Prusa Mini heater cartridge to arrive.  My printer could not keep temperature after a 2 day print with PETG. I hope the cartridge arrives with the proper size wrench to remove the blown cartridge.  I don't even know what size it is.  I'm positive it was not in included in the assembly kit. Does anyone know what size it is?

I believe it's 2mm.

My heater cartridge failed completely on the second print, but if the heater apparently fails to maintain a temperature, it could also be a problem with the thermistor.

Posted : 12/04/2020 12:45 pm
charlesnramsay
(@charlesnramsay)
Active Member

@bobcousins

I ordered both just incase.  I have family that are waiting for reusable masks.  I think they used an off brand for the initial build and supply genuine E3D for replacements.

Posted : 12/04/2020 6:07 pm
geoper2
(@geoper2)
Estimable Member

How can you tell the difference between the two?

Original Prusa Mini + Smooth PEI
Prusa Slicer 2.2.0
https://www.instagram.com/3dprintedgr/...
Posted : 13/04/2020 6:11 pm
christopher.s50
(@christopher-s50)
New Member

@geoper2

I've never heard of Prusa using knockoff e3d parts. e3d makes Prusa's hot end to their specification which is based off the v6 design. Highly doubt Josef would get a 3rd party brand since that relationship has been going on for many years.

Posted : 14/04/2020 2:38 am
JASII
(@jasii)
Estimable Member

For what it's worth, my Prusa MK3S stock heater cartridge is etched with, "E3D-24V-40W" in a serif font, while my Mini stock heater cartridge just has, "24V40W" in a sans font. So...???

MK3S Stock Heater Cartridge:

Mini Stock Heater Cartridge:

05/2017 - MK2s - 09/2017 +MMUv1
12/2017 - MK3 - 07/2018 + Mosquito hotend
12/2018 - ↑MK3s w/MMU2s
01/2019 - ↑MK2.5s w/MMU2s
03/2020 - Mini
06/2020 - MK2/3/MINI + Copperhead Hotend
Win 10 64bit - AD Inventor -…...
Posted : 14/04/2020 6:04 am
geoper2 liked
charlesnramsay
(@charlesnramsay)
Active Member

@jasii

Heater cartridge replaced. I'm getting the same temperature fluctuation. It's got the be the thermistor after all. BTW, neither the old or new heater say E3D on them. 

Posted : 14/04/2020 6:19 am
christopher.s50
(@christopher-s50)
New Member

@charlesnramsay

Check where your hotend fan shroud is pointing. If it's on the block, the heater cartridge will have trouble keeping up 

Check your slicer settings and double check that the fan speed is ~30% for petg.

Also, put a silicone sock on it. I can almost guarantee it will help. Do a PID tune on the hotend after installation.

Posted : 14/04/2020 6:29 am
joan.t
(@joantabb)
Veteran Member Moderator

@christopher-s50

is there a silicone sock available for the Prusa Mini? 
I believe the heatblock is a different size to the e3D v6 heatblock

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 14/04/2020 10:49 am
oliver
(@oliver)
Eminent Member
Posted by: @joantabb

@christopher-s50

is there a silicone sock available for the Prusa Mini? 
I believe the heatblock is a different size to the e3D v6 heatblock

regards Joan

Sure there are, look here Specific silicon socks for Mini

Posted : 14/04/2020 1:12 pm
geoper2
(@geoper2)
Estimable Member

E3D socks fits the mini heatblock but not as snuggly as the one provided by @lichtjaeger in the link above so its better to use those ones.

Original Prusa Mini + Smooth PEI
Prusa Slicer 2.2.0
https://www.instagram.com/3dprintedgr/...
Posted : 14/04/2020 5:26 pm
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