knob for 6mm shafts, fluted with indicator and tapered opening, with mattson mini modular logo

by hewsonchen, published

knob for 6mm shafts, fluted with indicator and tapered opening, with mattson mini modular logo by hewsonchen Jan 29, 2013
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mattson mini modular asked me what it might look like if i designed a knob with their logo, so here it is!

Of course, many of you will not happen to need a knob with a mattson mini modular logo on top, but here are some reasons why this might be a good starting point for your own projects:

the model has a tapered opening to account for the slight bulging that can happen at the bottom of prints, ensuring that the knobs are not "crazy tight" at the bottom of the print but yet too loose at top. instead, with the tapering, i have printed, seriously, like a hundred of these things and they all slip on easily and then achieve a good grip. (there were just one or two out of the bunch that ended up being TOO loose, but pretty good reject rate methinks)

the knobs have 2 internal ribs to help grab hold of fluted shafts

the outside part of the knobs have easy-grip fluting with a "large rib" for designating where they are pointing.

the logo itself gives an easy visual aid as to orientation.

in case you are wondering, what the $#$@# is a "mattson mini modular," they are my fave manufacturer of electronic synth modules... http://www.mattsonminimodular.com

they are usually used for electronic music, but can be used for other kinds of music as well (this is what i do with the modules) http://thenewlines.bandcamp.com

also, a shot of billy corgan's (of smashing pumpkins fame) gargantuan system:

have fun!


for my 6mm shafts, doing a uniform scale so that the Z axis is 18.6 mm seems to be ideal.

maybe for finishing, print in one color, paint a different color, and then sand off the top so that the logo stands out in the print color. of course, since this would require the paint to dry before sanding and before your glorious little masterpieces look the way they should, i took the lazy shortcut of painting the logos white instead of sanding. (that, and i'm short on sandpaper)...

off-hand, i can't actually remember what setting i used to make sure the knobs were sturdy but didn't have any holes on top. i think from the foggy corners of my head -maybe- medium (miracle grue), 20 layer height worked on the rep 2, v7 firmware... can't remember how many shells tho'... sry!

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