First home made bat - designed by artificial intelligence
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marsbug

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Re: First home made bat - designed by artificial intelligence
« Reply #15 on: August 13, 2020, 01:46:30 PM »

Thanks for the kind words and welcome. I must admit that I have been devouring this forum over the last few months - it has been a joy to see. And I have learnt so much from other people's posts, so thank you to everyone that has shared what they've done.

The original paper that came up with the somewhat strange design is here: https://link.springer.com/article/10.1007/s00226-020-01169-2 (I did link to it in the original post, but haven't quite got to grips with the forum code). There is actually a second, more complicated shape that I would like to try out next, that is in that paper. It is certainly beyond my limited woodworking skills, and I suspect would be easiest to do a first pass with a CNC. I'm trying to teach myself CAD, but it is a steep learning curve. Out of interest, has anyone ever played around with bat shapes with foam and industrial plasticine (as used for designing cars I think)? I suspect not, as it won't be possible to check how it actually feels.

I'm going to have get a bat gauge now, just to see if it squeezes through!

And if anyone can remember the GN model that Kulli mentioned, then I'd be really interested to hear. Or any other shape that was similar.
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Kulli

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Re: First home made bat - designed by artificial intelligence
« Reply #16 on: August 13, 2020, 01:50:35 PM »

Anyone got access to the paper through work or something. €35 seems a bit steep
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Jimbo

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Re: First home made bat - designed by artificial intelligence
« Reply #17 on: August 13, 2020, 01:58:05 PM »

Looks a bit like the illegitimate offspring of a GN Nemesis and an old school Woodworm. Very interesting.
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jimmy23

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Re: First home made bat - designed by artificial intelligence
« Reply #18 on: August 13, 2020, 03:26:49 PM »

You might want to remeasure the specs, a 37cm edge would be nice to see though.

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InternalTraining

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Re: First home made bat - designed by artificial intelligence
« Reply #19 on: August 13, 2020, 06:16:43 PM »

Pictures are fixed and they look great!

How did you create those templates? Also, can you add pictures of the drill sanders you used?
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marsbug

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Re: First home made bat - designed by artificial intelligence
« Reply #20 on: August 13, 2020, 07:41:27 PM »

Whoops - it took me a while to spot the clues about edge size and gauges. I put down the wrong units for some of them (I did say I wasn’t an engineer!). Sorry, I think you all spotted it.

They should be:

Edge: 37 mm
Spine: 60 mm
Toe: 14-33 mm
Shoulders: 12 mm
Sweet spot (estimated): 8-23 cm from toe

I haven’t quite been able to get my head round those Algobats either. I don’t doubt that the algorithm is doing what it’s supposed to, but the parameter it’s aiming for isn’t necessarily going to mean that a bat is good or not. I think they do mention other studies and what they’ve looked at. I guess if there were 3D scans of good bats, then they could be analysed in the same way to see how they compare. Surely that’s been done?!

But back to this bat. I actually ended up taking less out above the swell than the templates suggest - in that photo they’re not actually reaching the face yet. In the original design the concaving would go below the edge level! Instead I left a lot more spine all the way to the handle than in the design in the paper. If not, it would have been too heavy, so I took more out near the toe, to raise the middle a bit (it’s still a little low for my liking) and improve pick up. The next bat I’d like to make a version of is the one in the diagram @DorsetDan posted, with the spine scoop above the swell. But with a higher middle probably.
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marsbug

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Re: First home made bat - designed by artificial intelligence
« Reply #21 on: August 13, 2020, 08:51:56 PM »

@InternalTraining Here are the things I used. Mostly the ones in the blue case, but they’re coarse so had to be careful. The discs were pretty good too, especially with the foam as it was more forgiving. The tiny cylinders are meant for Dremels and weren’t much use for this bat in the end. For the templates I drew the shapes to scale in Adobe Illustrator and printed them out, stuck them on cardboard and cut them out.



And other things used that I forgot to mention:

Stickers - Diginate. Really good service, stickers are nice, colours came out bright, and were much cheaper than the reverse printed ones. Not sure yet if they’ll smudge when hit. The stickers on this bat have metallic parts, which look great, but I also got a set with transparent background and the colours are a bit brighter I think. https://diginate.com/

Oil - Salix linseed wax. Really nice to use compared to the mess I used to leave with the oil. Just one coat.
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InternalTraining

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Re: First home made bat - designed by artificial intelligence
« Reply #22 on: August 13, 2020, 08:57:34 PM »

^Genius!!!
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avkrish

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Re: First home made bat - designed by artificial intelligence
« Reply #23 on: August 14, 2020, 05:13:58 AM »






Great shape @marsbug. This is something I have been planning to get made someday, provided the bat maker agrees to do it; unfortunately I do not have the skills to do it myself.
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Kulli

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Re: First home made bat - designed by artificial intelligence
« Reply #24 on: August 14, 2020, 06:48:23 AM »

Actually, what I think it reminds me of is a laminate @jamferg had from @hit4six years ago. Was GN stickered but not a GN bat. All photos on the forum of it seem to have gone though.

Jamferg seems long gone but do you remember it Craig, or even better have some photos stashed away?
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hit4six

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Re: First home made bat - designed by artificial intelligence
« Reply #25 on: August 14, 2020, 07:58:39 AM »

Very good memory @Kulli - Having trawled through the darkest depths of an old Photobucket account, I have found them. This was the bat:



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Kulli

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Re: First home made bat - designed by artificial intelligence
« Reply #26 on: August 14, 2020, 08:06:39 AM »

Top man, knew I’d seen something similar a while back.
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Calzehbhoy

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Re: First home made bat - designed by artificial intelligence
« Reply #27 on: August 14, 2020, 01:57:05 PM »

Didn't Hunts make a bat almost identical to this and put honeycomb or something in the gaps?
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Kulli

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Re: First home made bat - designed by artificial intelligence
« Reply #28 on: August 14, 2020, 03:30:59 PM »

Modulus, wasn’t really that much like this in shape though.
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InternalTraining

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Re: First home made bat - designed by artificial intelligence
« Reply #29 on: August 15, 2020, 12:49:04 AM »

The "physics" if you can really call it that to make the "best" bat to hit a ball a long way in theory is to make it as stiff as possible, bring the first and second nodes of percussion as close together as possible, be as bottom heavy as possible and as a bonus, do this at the heaviest weight an individual can use. Basically increase the "swing weight" (horrible phrase) as much as possible and minimise losses as much as possible.

How do you locate/identify "first and second nodes of percussion"? What losses are minimized when you increase the "swing weight"?
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