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Step 12Add Mounting Nuts
We want a way to securely attach the UPCB inside the case. There are four mounting holes, one on each corner, we'll be using for just this purpose.
The mounting holes will allow a #4 bolts through without resistance, while a #6 bolt will screw in directly.
The metal bottom plate of the HRAP means we can't use a bolt through the bottom of the HRAP. So instead, I'm going to epoxy mounting nuts to the bottom on the inside of the case.
Using a 1/2" #4 bolts and nuts, put the bolts through the UPCB holes and loosely screwed the nuts on the bottom about 1 turn only. Place the UPCB in as far left inside the case as you can, with the output header near the back, and the stick header near the bottom. Check the picture to see where I mean.
Mix a small amount of epoxy, and apply to the edges of the nuts. We want to epoxy the nuts to the bottom plastic, but NOT epoxy the bolts in the process. Let the epoxy set for a while, checking periodically on an outside edge of the epoxy pool. We want it to set until it is getting very thick, but still liquid. Once there, gently unscrew the bolts from the nuts underneath. If the nuts move, leave it alone and come back when it has set further. Done properly, the bolts will come out leaving the nuts in place for the epoxy to cure. You can continue with other work on the case, as long as you are careful. You do NOT want anything nudging the nuts until it has had a chance to set overnight.
After that, feel free to mount the UPCB with the bolts for good.
The mounting holes will allow a #4 bolts through without resistance, while a #6 bolt will screw in directly.
The metal bottom plate of the HRAP means we can't use a bolt through the bottom of the HRAP. So instead, I'm going to epoxy mounting nuts to the bottom on the inside of the case.
Using a 1/2" #4 bolts and nuts, put the bolts through the UPCB holes and loosely screwed the nuts on the bottom about 1 turn only. Place the UPCB in as far left inside the case as you can, with the output header near the back, and the stick header near the bottom. Check the picture to see where I mean.
Mix a small amount of epoxy, and apply to the edges of the nuts. We want to epoxy the nuts to the bottom plastic, but NOT epoxy the bolts in the process. Let the epoxy set for a while, checking periodically on an outside edge of the epoxy pool. We want it to set until it is getting very thick, but still liquid. Once there, gently unscrew the bolts from the nuts underneath. If the nuts move, leave it alone and come back when it has set further. Done properly, the bolts will come out leaving the nuts in place for the epoxy to cure. You can continue with other work on the case, as long as you are careful. You do NOT want anything nudging the nuts until it has had a chance to set overnight.
After that, feel free to mount the UPCB with the bolts for good.
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