The low-voltage variable speed drive (VSD) allows variable control instead of fixed-speed operation. These days, VSDs can reduce energy consumption by up to 30% on average—and as much as 80% in ...
This short video from [ProShorts 101] shows us how to build a variable speed disc sander from not much more than an old hard drive. We feel that as far as hacks go this one ticks all the boxes. It is ...
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