Testing a 3d printed repeating crossbow (Slinghammer) with 80 lbs limbs and steelballs

The Slinghammer - a 3d printed repeating crossbow for different sizes of steelballs.

We like shooting with bow and arrow in our backyard (which is really huge and surrounded by fields). I also want to buy a repeating crossbow, so I was watching several review videos. I landed on a video of Jörg Sprave's Slingshot Channel ‪@Slingshotchannel‬ where he is showing a 3d printed crossbow. (And which has enjoyable content at least for me - großes Lob und Danke Jörg, solltest Du das jemals lesen, Grüße aus Österreich)
I looked it up un Cults3d and was totally hooked. A few clicks and Euros later the files were mine. Huge shoutout to Dondipper on Cults3d, great work.

I built it in the 10mm steelball version (materials below) and tested it with 9,5mm steelballs and it totally blew my mind. Great quality and great power.

General advice:
- use something to make the string glide like string wax or silicon spray
- wear safety glasses. If that steelballs hit anything hard, they will bounce back
- be aware that there is no locking mechanism, so only cock it, when you are going to shoot

Files on Cult3d (files for printing, instructions, variants):
https://cults3d.com/en/3d-model/vario...

original Video of Jörg Sprave:
   • Modern Day Ballester: So Cool!  

Things I used (Some of the following links are affiliate links marked with * in the description, which give me a little commission without changing the price for you.)

PLA I used in this video for printing the parts according to instructions*:
Snapmaker black: https://amzn.to/3u7alBW

set of springs* (every type that needed is included)
https://amzn.to/3QGCeJN

set of different steel ball sizes*:
https://amzn.to/3UwBWHz

10mm steel balls*:
https://amzn.to/3w6WpcG

EKArchery Cobra 80 lbs limbs:
https://www.ebay.at/itm/134298864168

I ordered the scews here but they are available in any hardware store https://www.schraubenking.at/

General Setup:
I use a Raspberry Pi for Octoprint (Model 3B or higher, I use 3B)* https://amzn.to/3O7qv4B
Take a look at Octoprint here: https://octoprint.org/

find Snapmaker products on Amazon*: https://amzn.to/3AOYjNN

Stand for filming with mobile phone* (which is really great): https://amzn.to/3G0jO0O

Cameras I use for filming inside enclosure and as webcam*:
Logitech C920 Full HD*: https://amzn.to/3JJNnpX
Logitech Brio 4k*: https://amzn.to/3YUmYKe

I use a Raspberry Pi for Octoprint (Model 3B or higher, I use 3B)* https://amzn.to/3O7qv4B
Take a look at Octoprint here: https://octoprint.org/

things I use for measuring*:
sliding caliper*: https://amzn.to/3NesULp
goniometer for angles*: https://amzn.to/3Rdj8do
try-square*: https://amzn.to/3NgP9QC

My desktop setup:
LG C2 42" OLED*: https://amzn.to/469fNBz
ElGato Stream Deck*: https://amzn.to/47rkHM1
similar straight version*: https://amzn.to/3ucXe2n
Mic*: https://amzn.to/49Vxlmy
Audio Interface*: https://amzn.to/3Ui0Qt0

00:00 Start
01:09 printing the parts
01:25 finished crossbow
03:16 shooting increasin layers of cardboards
05:56 shooting cardboards, birch wood and mdf
08:30 closeup