I had an old Skil handheld belt sander that I found for nine dollars at Goodwill a few months back. After taking up space for a few months I decided to adapt it to be a small bench mounted sander.
I designed and printed a bracket and printed some knobs for angle adjustment. Then I designed the belt sander table and cut it out of plywood on the MPCNC. Next I used some short pieces of 2020 profile, a few metric screws with nuts, some wood screws and a couple of t-nuts to tie it all together.
Voila! My unneeded handheld belt sander is now a (hopefully) useful benchtop sander.
That seems very useful. I have a similar (but significantly different) belt sander, and a random orbit sander, but nothing else. I occasionally clamp my belt sander to the bench, but it can get out of control fast when it doesn’t have a platform. Is there a reason you want the belt to be moving vertically instead of horizontally? I was thinking of making a platform for mine, but for some reason, I always imagined it being horizontal.