But i don’t have either. And I want a heatsink. As much for cooling as secure flat mounting!
So i’m going to start off focusing on the base plate (easier w/ no “cutouts” needed for UART/Sensor/etc. plugs).
A quick trip to the local hardware store had some 1/8" aluminum that is perfect width:
Working with basic tools (no CNC yet), i took some measurements of hole spacing (not perfect i’m sure), and found the intersections and punched them:
Once i confirmed alignment with the VESC holes, I used the first as a template and clamped them together to drill the rest out on the drillpress w/ 1/8 bit (closest - smidge bigger than VESC holes in mm).
Spacers to raise the PCB above and clear the aluminum… I got a bunch of fiddly little copper squares in different thicknesses specifically for this… and then i tested one of the pieces of aluminum and the 1/8" thickness worked GREAT as the standoff/spacer! So i cut 2 before my dremel needed re-charge and it was starting to get late… I cut them 12mm wide. So even after sanding edges smooth - still a bit generous. Plus a bit of overhang of the FET and leeway for less-than-perfect alignment/placement.
Some Arctic Silver adhesive, a stir stick and VOILA!
It’s getting on “stupid late” and need to crash, but a quick test fit to show the plan:
I will cut back (but not fully remove) the heatshrink - so the FETS are flat and in contact w/ the aluminum spacer/riser block, and use some plastic m3 to secure to VESC. I’ll try to show some pics tomorrow when i start those next steps.
So that’s the plan folks - a quick and easy DIY heatsink for a VESC! Mostly simple tools, and absolutely doable with nothing but hand tools! About ~$15 for 4 feet of aluminum (share w/ your friends!)… plus fun fiddling in the garage = Winner winner chicken dinner. Soon some flat mounting VESC’s that happen to have a bit more cooling (i hope). I’ll work on the top solution next and show you all what i plan there too.
Hope it helps the next OCD DIY’er who is tired of wobbly velcro’d VESCs!