Rugged Radios GMR45 Desk Base
Description
Rugged Radios GMR45 Desk Base Notes: [The version in the photos is the prototype. I’ve made a few changes from that version to make it faster to print, more solid when mounted under a shelf, and make bracket adjustment a little easier: -- Increased the base from 3mm to 6mm thick -- Added 2 more mounting holes -- Flattened the top edge to give a little more clearance under the front of the radio -- Reinforced the meet between the base and the wedge -- Removed material at the back of the wedge - saves around 2 hours printing time Those changes are shown in the computer-generated views.] This desk base was designed to be printed on small printers, such as my Prusa Mini. On the Mini, I recommend a skirt outline three layers thick, three layers wide, and three millimeters offset (as in the photo). It took a little over 11 hours to print the prototype with four layers all around. The changes add around 2 more hours at 30% infill, 3 more hours at 35% infill. If used as a desk base, PLA is fine and three layers top, bottom, and sides will be adequate, though 30% or higher infill is needed to give the bracket mounting screws some purchase. For undershelf mounting, I recommend PETG with four layers top, bottom, and sides, with the same or more dense infill used with PLA. The GMR45 is a heavy radio and might cause PLA to sag over time. Use all six mounting holes. To mount the steel bracket onto the base, I taped it in place in the base’s recessed area, made three pilot holes, screwed three of the supplied mounting screws in, removed the screws, and removed the bracket. I then applied silicone adhesive to the bottom of the bracket and secured the bracket with the three screws. [NOTE: Don’t tighten the screws too much because you’re only going into the infill. That’s why 30% or higher infill.] Generally, you’ll want to mount the bracket with the three adjustment slots forward. The upper slot makes the radio parallel to the slope of the wedge (about 17 deg.) and the lowest slot will give the radio an up-angle of about 1.5 deg. You can mount rubber feet through the base’s mounting holes (use all six), use stick-on feet, or (as I did) use a small sheet of adhesive-backed neoprene foam. You can use this same base for radios with mounting brackets 63mm or narrower. When mounting, just remember to butt the bracket against either the upper or lower edge of the recess. Total weight of the prototype (radio w/permanent cables (no microphone), bracket, base, neoprene pad): 1140g / 3lb 3oz.
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