Thread: homemade drum sander questions.

it needs to run far slower than the slowest speed you can reliably run a router at.

Have a look at this resource....

http://www.ukuleles.com/BuildingHowTo/sandthck.html


Router too fast!


Chipman

ok so how slow then?

i will have to make up a pullery system just some extra work.

what about an old lathe??

has no motor and i just chucked it out.

but i just got a brain wave i could make an attacment for the nova to do the sanding.

Originally Posted by weisyboy

ok so how slow then?

i will have to make up a pullery system just some extra work.

Carl, this person got theirs down to 1400 rpm

http://www.woodworkforums.ubeaut.com...ad.php?t=33157

Read the whole thread, it is very imformative.

Keep safe!


Chipman

said by skew

BTW, for some strange reason my memory dredged up the fact that the joinery I worked for many years ago specified a combined feed/sanding speed of 25m/s for their drum sander. I believe 'twas 'cos they'd determined it gave the best finish without sacrificing much speed in stock removal for the woods they normally worked. (Kapur & meranti) Funny what trivia the mind can spring on you, eh?

If my maths is right, for a small 15cm dia. drum that'd be around 3300rpm, given a slow feed

how fast dose a router spin?

Hi Carl
check with ttit his father made one i seen it before vern got it
Andrew

Carl, in Shopnotes #86 they have a plan for a drum sander driven by a table saw. They put a 2" pulley on the tablesaw to replace the blade and the drum sander has a 5" pulley. Now I don't know for sure how fast your average table saw spins, but I am assuming 1440RPM, so the drum will spin at 2/5 * 1440 = 576RPM.

The drum itself is 5 1/16" in diameter or about 128mm, which gives a circumference of 402mm

If I am wrong about the tablesaw RPM and it is actually 2880RPM (likely) then they have worked on 1150 RPM for the drum.

PM me with your email if you want a copy.

Edit:

Just looking at the PM2000 manual, their motor is 3600RPM, but the actual saw arbour is belt driven via pulleys, so I hven't a clue what RPM the saw arbour spins at!

Carl - routers are 8000 to 20,000+ rpm
Drum sanders are typically 1400 rpm

You could gear the router down but who would want to have a screaming router driving a drum sander when you could have a quieter 2800 geared or 1400 rpm motor.

Oh you lot of bad people leading me to perdition! Do you realise that now this is item 72 on my list of things to do?

Will use the old lathe for the drum, one of the dozen small motors in my collection and a gear box for the power feed, ....

Any opinions on the best way to regulate the thickness?

Originally Posted by Frank&Earnest

Oh you lot of bad people leading me to perdition! Do you realise that now this is item 72 on my list of things to do?

Will use the old lathe for the drum, one of the dozen small motors in my collection and a gear box for the power feed, ....

Any opinions on the best way to regulate the thickness?

Have a look at the links I posted earlier in this thread... plans and howto all there!

Chipman

i was gonna use a sizor jack or a home mabe booker rod contraption the same as my router table.

Originally Posted by Chipman

Have a look at the links I posted earlier in this thread... plans and howto all there!

Chipman

Sorry for not thanking you before, Chipman, but of course I downloaded and studied that description before bothering our fellow members. The problem is with my cynicism: IMHO to claim 5 micron accuracy with that home made machine one has to be a lier or sorely delusional. I would be absolutely ecstatic with 100u accuracy and in my ignorance I can't see how to achieve it.