I've Gone and Done Something Mental

[MattF]

Do it

Thanks for the discouragement.

 

[m_c]

Currently trying to resist ordering one of these, to have a play with.

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I've got an older version of that.
I'd personally spend the extra money for a larger version.

 

[MattF]

It's getting on my tits now, so I'll ask incase anyone knows of one. Is there an addon board available to turn that poxy printhead fan off when the printhead is cool/cold?

 

[m_c]

It's getting on my tits now, so I'll ask incase anyone knows of one. Is there an addon board available to turn that poxy printhead fan off when the printhead is cool/cold?

I'm assuming you mean the hot end cooling fan?
Not that I know off, as it's the one fan you really don't want to fail, as if it fails, bits that aren't meant to get hot, get hot very quickly.
People do fit quieter fans though.

Or there are various options to kill all the power to the printer once a print is finished, and things have cooled down (or in the case a heat runaway/fire has been detected...)

 

[ajlelectronics]

I have got fed up with constantly having to relevel the bed, so have ordered a set of decent springs, a BL touch auto leveller and a twin Z axis conversion. I am getting to believe that the adjustment knobs are actually unscrewing with the motion of the bed. The clearance always closes up, rather than expands.

 

[ajlelectronics]

I am struggling a bit with this print now. It is supposed to be 13mm diameter with an 11mm collar. The inside measurement is supposed to be 10mm but is 9.4 ish when printed. I have tweaked various Cura settings with no improvement.

the collars are to convert BMW Wellnuts at a fiver each, to Chinese versions at under a Pound each.

 

[carbon]

Have your other prints been dimensionally correct?

 

[MattF]

Have you tried resizing it in Cura? I've had to resize a few pieces to get them to the size they ought be. Think it's the third icon down on the left side of the screen.

 

[MattF]

I'm assuming you mean the hot end cooling fan?
Not that I know off, as it's the one fan you really don't want to fail, as if it fails, bits that aren't meant to get hot, get hot very quickly.
People do fit quieter fans though.

Or there are various options to kill all the power to the printer once a print is finished, and things have cooled down (or in the case a heat runaway/fire has been detected...)

Aye. A temp controlled circuit to turn it on/off at around 30 to 40 degrees is what I'm after. Looks like I may end up making one. It's pointless that fan running when it's cold.

 

[ajlelectronics]

Have your other prints been dimensionally correct?

Yes. I suspect it is to do with minimum wall thickness, because it will need to be .5mm and that may be pushing it. I tried setting the thinwall options in Cura but no joy. The 13mm and the 11mm dimensions are correct. The original design checks out at 10mm ID.

 

[ajlelectronics]

Have you tried resizing it in Cura? I've had to resize a few pieces to get them to the size they ought be. Think it's the third icon down on the left side of the screen.

Trouble is, the whole thing would resize.

 

[MattF]

Trouble is, the whole thing would resize.

Nope. You can resize it in any of 1, 2 or all directions.

 

[ajlelectronics]

Nope. You can resize it in any of 1, 2 or all directions.

OK, if you can find a way to enlarge just the bore, I'm all ears.

 

[MattF]

OK, if you can find a way to enlarge just the bore, I'm all ears.

That's not what you said.

 

[ajlelectronics]

That's not what you said.

It is supposed to be 13mm diameter with an 11mm collar. The inside measurement is supposed to be 10mm but is 9.4 ish when printed.

 

[ChrisBailey]

Do you have the 3d model file you could edit the dimesnsions on?

 

[ajlelectronics]

Do you have the 3d model file you could edit the dimesnsions on?

Yes I designed it and have triple checked the dimensions. It is a DSM file.

 

[tflnemesis]

I am struggling a bit with this print now.

Change your nozzle for a 0.5 so it will just be a single wall?

 

[m_c]

It is supposed to be 13mm diameter with an 11mm collar. The inside measurement is supposed to be 10mm but is 9.4 ish when printed.

It's the thin wall that is the problem.
Wall thickness is restricted by nozzle size, so if you're using the stock 0.4mm nozzle, I'd guess Cura is going for double line width, which will give a 0.8mm wall thickness, and your resultant 9.4mm.

You could try dropping wall thickness to 0.4mm, but I'm not sure if Cura would let you print a single line width wall, or if the resultant print would have much strength.

 

[ajlelectronics]

It's the thin wall that is the problem.
Wall thickness is restricted by nozzle size, so if you're using the stock 0.4mm nozzle, I'd guess Cura is going for double line width, which will give a 0.8mm wall thickness, and your resultant 9.4mm.

You could try dropping wall thickness to 0.4mm, but I'm not sure if Cura would let you print a single line width wall, or if the resultant print would have much strength.

I tried that but as you say, it wouldn't allow it to print a single skin. I did have thoughts about that and wondered if I should try an 0.2 nozzle?