Anyone may compare it against the Original Batch2 code written by Zach, but keep in mind, this modified code is also calibrated for our batch2 machine with a 5V controller and a 3.3V divider. (We have a batch2 controller with a batch3 divider)
I created a hinge for the harness by running the straps through only the top hole in the front plate. I had to remove the standoffs to route the straps this way:
The harness was leveraging on the front plate when folded up and bending the carbon because there wasn’t a standoff so I designed a 3D printed standoff:
I designed some rails to quickly install the batteries. I printed these parts standing on end so that layer adhesion wouldn’t create any weak spots and I used PETG because it is both stronger and has better layer adhesion than PLA. PETG also sticks well to the print bed so I didn’t have any problems printing them standing up. They are riveted on with 1/8” rivets and a 4 mm bolt at the bottom where all of the weight rests.
The sliders are curved to allow the batteries to swell more than mine currently are. I put thin foam tape at each end (yellow circles) to hold them from sliding:
Thanks for sharing the files. It’s nice that you positioned the batteries up high on the back plate. That way they will feel lighter when being carried on your back. Well done.
One of my first and favorite improvements I made to my OpenPPG last summer was quick latches for the arms. They automatically click lock when the arms are folded out and quick release with one finger to fold the arms back in. At the top of this thread you can see the original ones I made out of Lexan. I decided to test a 3D printed version which would make it available to more people. They simply pop rivet into holes that are already in the frame. I printed them with PETG and they work great!
Also, keep in mind that during flight there isn’t any stress on these because the thrust holds the arms open. The hoop will also hold the arms open. They are more a setup aid than anything. So if you broke one on the way to go fly I wouldn’t let that stop you from flying.