Benchtop drum sander - video

[Jon]

Benchtop drum sander. By DIY Tools. 14:44 video:

[greenie]

Looks like a "Thickness Sander" to me, the self feed idea is good, saves pushing the wood thru.

Only major problem with that design, is that only one end is fixed, this can allow that open end to flex upward, which it does very easily, if you get greedy and try to take off too much.

[dbat74]

QUOTE=greenie;187067]Looks like a "Thickness Sander" to me, the self feed idea is good, saves pushing the wood thru.

Only major problem with that design, is that only one end is fixed, this can allow that open end to flex upward, which it does very easily, if you get greedy and try to take off too much.[/QUOTE]
I was thinking the same thing. Both sides need to be able to raise and lower with the same crank handle.

[laprivan]

From the mechanical engineering point of view, both sides would normally be supported. This is the case with thickness planer. However, thickness sanders are typically open at one end in order to effectively double the width of boards that can be finished. With proper adjustment, the open-ended design works quite well.
One improvement would be using more precise axles and Bronze sleeve bearings.
Otherwise, a nicely done projected.
Best Regards,
Laprivan

[olefella]

Pretty impressive bit of woodworking skills and design ideas. Well done.

[olefella]

Pretty impressive bit of woodworking skills and design ideas. Well done.

[Beserkleyboy]

As Laprivan has said, many of the low end thickness sanders are of the open end style. I've used two of those with NO problem of flex..but mind, the cuts are not like thickness planers, but in the region of 1mm per pass. His design is excellent in regard to minimising drum deflection. Cudos to a well thought machine. And btw, anyone suggest that motor for drive control? Thanks guys.