Hotend heater connection

[MattF]

Getting round to putting that new hotend on, & I've got a new heater to put in there, (the old one is well & truly stuck in the old hotend. Couple of questions.

Firstly, the replacement has unterminated cable ends. Will I be okay to snip the termination end off the old cable, solder to the new heater & insulate the joints with heatshrink? Can't see there being any notable heat or other issues at the connector end? This bit:



Secondly, does the heater need any thermal paste applying, or does it just go in the hotend block clean, as is?

 

[ajlelectronics]

Yes, no and yes!

 

[Pete.]

I pulled off the hot end and stuck the heater wires across a 18v power tool battery until it got screaming hot then pushed the heater out with an allen key.

Don't hold it in your fingers

 

[MattF]

Yes, no and yes!

Bit vague. Yes, it's okay to do that, no, there's no heat issue there, & yes, it goes in unpasted?

 

[Pete.]

There's no pste, you just poke it in the hole and tighten the grub screw/pinch bolts.

 

[MattF]

I pulled off the hot end and stuck the heater wires across a 18v power tool battery until it got screaming hot then pushed the heater out with an allen key.

Don't hold it in your fingers

Was tempted to try heating it, but then realised a pack of heaters, thermistors & micro-switches cost practically peanuts, so decided to replace with new.

Besides, I've already cut the end off the old cable now.

 

[ajlelectronics]

Bit vague. Yes, it's okay to do that, no, there's no heat issue there, & yes, it goes in unpasted?

Sorry yes, connecting like that is fine, a soldered or crimped joint recommended. Thermal compound will not achieve much there because you have pretty fine physical contact between the two.

 

[MattF]

There's no pste, you just poke it in the hole and tighten the grub screw/pinch bolts.

Lovely. Thought that would be the case, but thought it best to check first.

The thermistor does get a smear of paste though?

 

[ajlelectronics]

Lovely. Thought that would be the case, but thought it best to check first.

The thermistor does get a smear of paste though?

Yes, a good idea.

 

[MattF]

Sorry yes, connecting like that is fine, a soldered or crimped joint recommended. Thermal compound will not achieve much there because you have pretty fine physical contact between the two.

Cheers. Thought that'd be the case, but it's best to check before fitting.

 

[MattF]

Read through the instructions again that come with the new hotend, & they're dire. They don't even mention/list several of the parts that come with it.

 

[Chippie]

I’d have been tempted to smear some Coppaslip on the heater then insert….

but each to his own….

 

[MattF]

Anyone know where to download the firmware for the 4.2.7 board with CRTouch? Seems Creality have altered their site somewhat since last time I looked, & I'm finding it confusing trying to find board, rather than model, specific firmware on there now.

 

[Pete.]

Anyone know where to download the firmware for the 4.2.7 board with CRTouch? Seems Creality have altered their site somewhat since last time I looked, & I'm finding it confusing trying to find board, rather than model, specific firmware on there now.

This page has a 4.2.7 firmware that "support automatic levelling"

creality

Where to download the 3d printer slicing software? Where to download 3d models? How do I download 3d printing slicer? Where to download the firmware of 3d printer Ender-3 Pro? how to install 3d printer Ender-3 Pro? where do I find the user manual of 3d printer Ender-3 Pro to operate? check more here

www.creality.com

 

[MattF]

That looks to be for the 4.2.2 board?

 

[MattF]

The printer is up & running, btw. I'd forgot how annoying these things can be, not having used it for a while.

Affixed the CRTouch unit whilst I was at it, & also patched some wire into the hotend fan leads, so that they aren't at full stretch.

 

[MattF]

As you can tell, with all the heatshrink sleeving.

 

[Pete.]

That looks to be for the 4.2.2 board?

 

[MattF]

View attachment 380101

My apologies. Missed that one.

 

[MattF]

By god, it's taken some faffing to get this printing. I've ended up having to guess a value for the Z probe offset, to get it to start printing close enough to the bed. Auto home sits the head about an inch above the bed, so I couldn't work it out from that

It's running a test print as I speak. The previous attempts have been failures. This one's looking promising though.