On 20-Mar-18 9:00 PM, Leon wrote:
On 3/19/2018 8:29 PM, Perry wrote:
On 20-Mar-18 4:49 AM, Leon wrote:
On 3/19/2018 6:06 AM, Perry wrote:
I'm not a wood worker so bear with me......


I've got a cast epoxy widget about 6 inches long x 2 inches wide x 1
inch tall.

It's cast in a mold and has a sharp edge around the top from the
casting process. I want to remove this and shave maybe 1/16" off the
top.

The sides are sloped so I cant grip it in a vice and machine it
under a milling machine.


I came across drum sanders and wondered if something like one of
these might work?



https://www.machineryhouse.com.au/L110

https://www.carbatec.com.au/sanding-and-finishing/sanding-machines-and-accessories/drum-sanders/sander-wide-drum-400mm-old-code-wds-400-wds-4080p




If I was to feed the 6" x 2" x 1" epoxy piece through what sort of
finish might I expect and would it be likely to kick the piece around?


It would be fed in with the shortest dimension (1") vertical.


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drum
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|Â*Â*Â*Â*Â*Â*Â* Direction of feed ==Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* |Â*Â* 1" tall
|Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â *Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* |
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Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 6" long



Thanks guys.



So I actually have a drum sander similar to what you are referencing.

How does this particular Epoxy sand normally?

It is easy to heat the sand paper up on these type sanders if you try
to take off too much.Â* There is no give under the paper like most
sander have so it can be unforgiving if you try to take off too much.

When simply sanding hard woods I typically take off about 1/48" per
pass.Â* Once the paper is heated up and clogged it is toast in that spot.

AND it is best to feed the material at an angle so that the sandpaper
can cool.Â* You can feed straight to control the scratch pattern on
the last and very light pass or two.

As far as smoothness of finish, that would depend on the grit paper
you are using.



The epoxy seems to sand well on a linishing belt. It doesn't clog up
the paper.

1/48"..... 0.5mm - that sounds fine as may only need to remove 1 - 2mm.

Do you know what the shortest piece is that you can feed through your
machine?

IIRC 4~5".Â* Again IIRC the length should be long enough that it is under
any of the 2 rollers or the sanding drum itself.Â* Keep in mind that when
sending the work in at an angle that it effectively shortens the length
of the work that you are sanding.





thanks.



Thanks Leon.
As a new visitor to this NG I've found it very helpful!