$60 USBC Motorised belt knife sharpener

I've been through a fair few iterations of this, and this one is the first I am happy with. I have USB C plugs in my kitchen already, so this makes this sharpener super convenient to use and brings a knife back to life extremely quickly. It gives a slight convex shape to the blade edge.

It uses a cheap motor from AliExpress, in truth the motor is a little overpowered, but with the speed adjustment it works well for this purpose. 

The platform is removeable so you can have multiple angles if you so wish. I prefer to just bring all my knives to the same angle so there is no remembering/faffing.

All in, including belts you can have a functioning sharpener for under $60. 

Do not use abrasive filament for the platform as it will blunt the knife as you drag it across (ask me how I know!)

As with any sharpener, practice on your least favourite knife. 

Parts list is as follows, costs are approximate and sourced from AliExpress:

4108 380kv Motor $22.00 (www.aliexpress.com/item/1005006968180843.html)

Motor Driver with Pot $6.50 (aliexpress.com/item/1005005983306835.html)

Bearing 10*19*5 $4.50
12v Trigger USBC $1.00
M6x45mm Coach Bolt $3.00
M3x10mm thin/wafer/flat head bolts $2.00
m3x10mm socket cap bolts $2.00
m3 heat set inserts (6mm length) $3.00
Belts $15.00 (e.g. www.aliexpress.com/item/1005006683908185.html)
MTS 203 Toggle Switch SPDT on-off-on  $2.20 (optional)

I wired up the switch so that I could reverse the direction of the motor, however it is not really necessary as you can just wire it up so that the belt moves ‘away’ from the blade and not into it (some belts might catch if you have it moving into the blade). So you can skip this part and fill in the hole if you aren't using. 

I'll put up a build guide at some point, and also upload mesh models for those of you who don't use CAD.