2021-11-01 Meeting Minutes - Arm CAD Spin

Axis 1

-use larger shaft and step it for angular contact bearing

-small flat with retaining compound is fine for shaft

-flip bushing on worm gear

-highly recommend cover for

-downsize standoffs

-shrink everything

-forget about lockwashers, just use loctite

-ignore washers use close fit screw clearances

-pems instead of locknuts

-hex standoff on shaft side is not important if we shrink everything

-shorten whole shaft

-only use covers to encapsulate whats necessary

-if we outsource bracket, add standard radius for ball end mill on inside corner

-over kill on bolts EVERYWHERE

-reduce bolts to reduce mass

-less washers - close fits and just the screw head

-just 3d print encoder mount, no load is going to be applied to it

-move tensioning up, dont bolt on bolt

-PROPERLY SPEC OUT BELT TENSION, QUANTIFY THAT LOAD

-you can make a cutout and wedge a flat in here to push back this assembly, or you can add a feature and setscrew to push that flat

-seperate the link into various parts

-reduce complexity of joint stackup

-thrust bearing may not be necessary

-try to eliminate thrust bearing if possible

-split axis 4 into two pieces

-more efficient ways to reduce weight

second pass for a1-a4

-figure out how to add a slot to allow shaft to slide into bracket

-fix belt routing for encoder standoffs

-use a shoulder bolt instead of press fit shaft for idler

-use pems when possible (max thickness is applicable)

-tensioner pulley could bend when you tighten it

-press fit into 3mil sheet will create lots of issues

-it would be good to support shaft ends of tensioner and idler

-less bolts for connection

-twisting is a concern for the sheet metal on differential

-sheet metal pieces may need a second iteration