Stuff your 3D printer has made today...

[Agroshield]

...the involute spur gear calculator I used...

Please could you link to or reference it.

The key term is 'lowest (or highest) point of single tooth contact'. It is specific to the mating pair of gears.

https://involute.pro/fileman/Uploads/HPSTC&LPSTC.pdf

https://techhubresearch.com/index.php/journal/article/view/4/4

Diagram of how to calculate HPSTC here:

https://www.researchgate.net/publication/49589974_Rating_of_Spur_Gear_Strength_Using_Photoelasticity_and_the_Finite_Element_Method/link/00b7d5192c8d52e14b000000/download

A general-purpose calculator will likely give an acceptable worst-case figure. However, if you know the tooth count of both gears, it is possible to improve on that. In addition, a circular fillet can itself be improved upon (search under 'gear root fillet'):

https://www.researchgate.net/figure/Gear-tooth-root-curve-shapes_fig3_266794877

The difficulty is that most literature on gears is focussed on traditional subtractive manufacturing methods. Nylon moulded gears have been produced for years, and the people who make those do optimise the shape for best strength and fatigue, but not so many of the standard calculators take the manufacturing process into account when drawing the gear.

 

[MattF]

By then there'll have been a Bank Holiday sale or an even cheaper game changer on the market!

On that point, just been looking on Aliexpress. Buying it via them, currently, (if anyone else is considering one), works out notably cheaper due to the sale & current coupons/vouchers. Shipped from UK. I'm assuming one of the Anycubic stores on there will/may be the same supplier.

 

[Dr.Al]

A couple of extra bits for the home-made woodturning lathe:

The thing on the left is for setting outside calipers to various different diameters to match the ideal sizes (those that form a perfect circle) of the different metal jaws I have. The thing on the left with the magnets glued into the back goes on the head stock and provides a temporary storage space for the chuck key and a 4 mm t-handle Allen key:

 

[fizzy]

A very large replacement fan cover for a 7.5hp 3 phase motor. Old cover was very tatty.
Used almost a full roll of filament. Took 37 hours

 

[Bki26]

A very large replacement fan cover for a 7.5hp 3 phase motor. Old cover was very tatty.
Used almost a full roll of filament. Took 37 hours

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I feel like you used 100% infil lol

 

[fizzy]

I feel like you used 100% infil lol

Yes i did indeed.
Filament been open for 5 years. Heated it for a few hours by the aga before use
Biggest print so far. The Elego Neptune 3 max is brilliant and huge.

 

[ajlelectronics]

Yes i did indeed.
Filament been open for 5 years. Heated it for a few hours by the aga before use
Biggest print so far. The Elego Neptune 3 max is brilliant and huge.

There is rarely a good reason to use 100% infill.

 

[MattF]

There is rarely a good reason to use 100% infill.

C'mon. When has reason ever been a realistic consideration for anything?

 

[fizzy]

There is rarely a good reason to use 100% infill.

I don't usually but wanted to use up the filament

 

[ajlelectronics]

I don't usually but wanted to use up the filament

I wondered why a simple print of mine was taking six hours. Have a guess?

 

[My Old Landy]

A little job for work, there will be 450 of them by tomorrow

 

[Onoff]

A very large replacement fan cover for a 7.5hp 3 phase motor. Old cover was very tatty.
Used almost a full roll of filament. Took 37 hours

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One of your many fans?

 

[iNf]

One of your many fans?

Only fans

 

[Onoff]

Only fans

I'll set 'em up son!

 

[fizzy]

Only fans

I just knew it

 

[fizzy]

A little job for work, there will be 450 of them by tomorrow
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What are they for?

 

[Onoff]

What are they for?

Work...

 

[My Old Landy]

What are they for?

Nothing secret this time, they are bobbins to hold inductor coils

 

[Bki26]

I don't usually but wanted to use up the filament

Just print random toys/useful tools with the filament lol plenty there plus upload makes to some sites and get free filament

 

[dieselsamurai]

Couldnt find a flush valve with a long enough cable for the cistern that feeds the cloakroom toilet its mounted above the cistern for the main bathroom and years ago i must have found one with an 800mm cable but couldnt find one again.
I designed a box that uses the cable from an identical valve as an extension and now I have a spare valve too



Lid clamps it all in place tight and fixes to the wall above where water can siphon down the cable