I've Gone and Done Something Mental

[m_c]

It's a problem with screw terminals that are being run near their current rating. Probably been slightly loose. It's worth checking terminals after being run for a few hours, just to make sure nothing has loosened off

 

[carbon]

The printer I have is prone to melt the connector on the underside of the print bed, so the best fix is to solder the cables straight to the print bed.
For the other connections to the motherboard its usually better to use krimped ferrules on the cables. Or better still us krimped ferrules and a mosfet driver to power the print bed from the power supply rather than from the motherboard, then the motherboard isn't handling the high current for the print bed

 

[Onoff]

Any one know the heated bed element resistance of the Ultrabase? I'll test for continuity when I get home.

 

[Onoff]

In we go!

4 wires to the bed. A thick red and thick black going to the hotbed, both silicone cables. Then a small green and small blue from the bed, temperature sensing I presume.

Need one of these, the screws were a bit loose!

Mengfen
300V
20A
MF-129
5.08

The interweb to the rescue!

2 Way PCB Terminal Block Connector 5.08mm 20A

5.08mm pitch terminal block moulded from PA66, suitable for a wide range of applications.2 Ways5.08mm Pitch20A Maximum CurrentSlotted ScrewsEnd Stackable

www.switchelectronics.co.uk

Should be here Friday.

Also now looking at a MOSFET upgrade.

Hopefully the heated bed is ok. I've continuity and measuring approximately 1.2 Ohms across red & black going to the bed.

 

[Onoff]

A bit of soldering and a 21p fixit later and back up and running!

First print will be the brackets for the MOSFET upgrade!

 

[badabec]

Hello, Ender 3 v2 question.
I load the gcodes onto a micro SD and plug into the machine. There are 50 plus gcodes on the card.
On the Ender screen I can only scroll through 15 or so.
Why can't I see all of them?

 

[ajlelectronics]

Something is afoot!

I have never been able to find exactly the project box feet that I need, at a realistic price anyway. This is an example of the range of designs I have run up today...

 

[ajlelectronics]

First TPU print. Seems OK but was a little stringy. It also caused a nozzle blockage for some reason, but not until the end of the printing session.

 

[Onoff]

Awaiting some 16 AWG 200degC cable before rewiring for the two new MOSFET boards. The support bracket is printed in grey PETG. No.1 son designed it, drawing from half a dozen other designs. You remove the SD card reader board, slide the support bracket over the standoffs for that (the SD board) then screw the card reader back on. They fit nicely.

 

[Anguz]

First TPU print. Seems OK but was a little stringy. It also caused a nozzle blockage for some reason, but not until the end of the printing session.


View attachment 320032

Weber dgas gasket?

 

[ajlelectronics]

Weber dgas gasket?

Yes, top gasket that the air filter sits on.

I still have some terrible stringing, so it's experimenting with temperatures if I get time tomorrow.

 

[Anguz]

The hours i have spent on those.....

 

[selectedgrub]

Looks like something i'd cut cut of an ice cream container lid with a sharp knife.

 

[ajlelectronics]

Cleaned up the stringing and I suppose that they are useable.

 

[Anguz]

silly question time again
downloaded a pla temp tower from thingverse, it automatically changed the bed temp and the print temp.
trouble was the bed temp started at 40 degrees which i cant get it to stick at....
how is this coding done? it step changes the temp on layer levels ? i am using cura and if it is capable o it, i cant see where?

 

[ajlelectronics]

silly question time again
downloaded a pla temp tower from thingverse, it automatically changed the bed temp and the print temp.
trouble was the bed temp started at 40 degrees which i cant get it to stick at....
how is this coding done? it step changes the temp on layer levels ? i am using cura and if it is capable o it, i cant see where?

It is in the code, which you can edit in any text editor. The easier alternative is to tweak it via the "tune" function, once the code runs in the printer.

 

[Anguz]

It is in the code, which you can edit in any text editor. The easier alternative is to tweak it via the "tune" function, once the code runs in the printer.

see what you mean......just looked at the code.... not looking again

 

[badabec]

I took a selfie then 3D printed. Used acrylic paint, or as my mum called it, Akri-Lack

 

[ajlelectronics]

Cleaned up the stringing and I suppose that they are useable.

It would appear that the default Cura settings are way off for the Sunlu TPU filament. First I noticed that my extrusion setting had gone back to default, so reset that again followed by the nozzle height. Temperature now at 190/0C and it looks like a clean print coming out.

Edit: 190C causes under extrusion. Gone up to 200C now which looks good but it is stringing. I see that some are recommending that you only print one item at a time.

 

[ChrisBailey]

Cura has a print order setting, do one at a time to reduce stringing.