Nice, Something to go with my new j-head...
Departed, have you had any problems with the jhead melting the MK4 mounting surfaces? I designed a similar mounting system and partially melted it using the extruder that came with my machine.
If the thermistor falls out, there is no fail safe. The hot end will heat up to its max while the thermistor reads room temperature. So be absolutely certain that it will hold.
I have it pinched with the wiring coming off of the resistor. I have tried my hardest to get it to come out but I have not been able to yet.
]]>How are you holding the thermistor in the block? It looks a lot neater without the Kapton wrapped around it. I tend to overdo mine just to be safe and not give the wires a chance to move around and get fatigued.
I hate the look of kapton tape wrapped around everything so for now it is just being held in place by the tension from the wiring wrapping around the front. It fit somewhat snug into the hole and I loaded it with thermal compound. It is holding in place for now and I have inspected it multiple times finding no movement. Time will tell if this holds up.
]]>Nice, Something to go with my new j-head...
Haha, your wiring job is a lot better than mine. Looks like a very solid fitting. I'm sure you will have a good time printing with that nozzle.
It has been printing like a champ! Glad my stock SD hot end finally bit the dust so I could justify the upgrade.
230C in 90 seconds. Cant complain...
]]>DePartedPrinter wrote:Nice, Something to go with my new j-head...
Departed, have you had any problems with the jhead melting the MK4 mounting surfaces? I designed a similar mounting system and partially melted it using the extruder that came with my machine.
I have not had any problems yet but I only only have about 3 hours print time with the new hot end. The MK-V-BV has the cooling slots built into it which seem to help dissipate any heat traveling up the barrel.
]]>Nice, Something to go with my new j-head...
Departed, have you had any problems with the jhead melting the MK4 mounting surfaces? I designed a similar mounting system and partially melted it using the extruder that came with my machine.
Nice, Something to go with my new j-head...
Haha, your wiring job is a lot better than mine. Looks like a very solid fitting. I'm sure you will have a good time printing with that nozzle.
]]>So I'm reading that right that you are printing at 231C? Do you have a lot of clogs due to cooked plastic in the nozzle? The highest temp I've printed at is 200.
J-head 231C is like Solidoodle 200C.
]]>-Won't you get brittle parts from too fast of cooling?
No, because if your plastic is hot enough, it will still have time to melt the adjacent layer and form a good bond. I have noticed no difference in strength so far.
When used with an enclosure, the always-on fan approach works extremely well for me. I will document this more later, but for now I can say that it has helped quite a bit in reducing warp.
Also, I have updated the fan mount .stl file. The new version is much closer to the extruder, and actually fits without bumping into stuff. If you are using an enclosure, which you should, it will require a plastic party tray for the front door since the fan sticks out past the case a bit.
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