Shock mounting electronics

Our team is wondering if anybody knows of a good way to incorporate some kind of shockmount into the electronics board mounting. Our team In the past has attached all the electronics to a piece of polycarbonate, and then directly attached that to the robot frame. We are thinking that dropping of the level 2 Hab platform this year could potentially damage some electronics. Do you think this is necessary. Additionally if you have a design that can be done with stuff from a hardware store that would be great, as we plan on building this in the next day or two, and would prefer to not have to wait for shipping.

At a minimum I would just rubber mount them with o-rings or rubber tubing. You can easily find that stuff at a hardware store!

We’ve used these from McMaster in the past with great success. Just get the size you need, and consider the dampening material.

Coroplast, 3D-printed standoffs, and copious amounts of industrial strength velcro. We’ve been using this method since 2015 or so with no issues. The roboRIO sits on top of the PDP, which is velcroed to the belly pan.

Wheeeeeeee - https://www.youtube.com/watch?v=qgLqBsW6QnE. This is a test drive base. We will definitely secure battery leads and reinforce gearbox mounting, but we’re considering letting the controls get jiggy with it.

Also consider rubber bushings designed for electrical feed-throughs. Just use them like a washer/spacer on the mounting bolts.

We’ve got a load of old fashioned mouse pads that have worked great over the years but I’m just a simple soul.:sunglasses:

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I would encourage some research on the expected G-forces from driving as you mentioned, and the possible effectiveness of any particular mounting method in helping mitigate those forces.

In other words, if you have 10G, 1/2" rubber grommets ain’t gonna do nothin’.

If it is possible try to move the electronics close together and squeeze it inside a protected area of the robot, protection by means of a possible hit or by means anything that would strike the frame, if this is an unprotected area meaning not in the frame or cannot move inside the frame of the robot try forming a metal box around it and place a polycarbonate part on top so that electronics are visible and protected, kind of like a light switch, there is a box in the wall that holds electrical components but the things you need to see like the light or switch are visible through the clear material. Things like bare wiring should not be done (it’s obvious but just as an understanding) try protecting it with electrical tape for parts less than an inch or for ends of wiring use ferrules from automation direct because they are cheap affordable secure and safe if you are looking to cover an entire bare wire try using a nonconducting tube that could be flexible if need be. But as far as mounting a pcm pcp roborio or protected circuitry as such you shouldn’t need to worry about it unless parts are exposed or conduct electricity if so, try finding a brass bolt or bolt like it that does not conduct possibly even use zip ties and fasten them on, personally I really like the zip ties for easy removal.

In reality the only electronics that could be damaged would be the battery if the normal components/electrical are secured correctly but the battery shouldn’t have damage done if it has been secured also but it is only a 6 inch drop, yes some kind of spring would be great but really isn’t needed but in conclusion all those things I mentioned are nice but not required for the structure

Cut sections of pool noodles that are about 3" to 4" long. Use them like standoffs to support your electronics panel. Use long zip ties running through the center of the pool noodle and then back around the outside to secure the electronics panel. That should provide lots of compliance in all directions to isolate your panel.

Extra mechanical components such as boxes around the electronics only makes the resonant modes more complicated and possibly much worse unless it is designed properly with computer simulations to find and eliminate/minimize the mechanical resonances.