|Project by BobAnderton||posted 08-10-2014 09:29 PM||5619 views||34 times favorited||9 comments|
I’ve seen several examples of this type of thickness sander powered by a lathe. Shipwright made one that was powered by a shopsmith that comes to mind here.
I made the drum using a 6 inch diameter 15” long piece of plastic tube. I made the endcap using plywood and tapped a piece of pear to 1.25-8 to thread onto the spindle. I had a roll of fabric backed sandpaper already and I cut the end of it on a diagonal such that the downweb length of the taper equals the circumference of the drum so that it wraps onto the drum correctly. I used 3M super 77 spray contact adhesive on the back of the sandpaper strip to attach it to the drum.
I had some of these pieces of 3/4 inch 13 ply plywood and doubled them up to make 1.4 inch thick ply for the two tables. The tables are 15×30”. I had a bunch of these really stout hinges and used two of them to hinge the two panels together and used a couple of pieces of threaded rod and knobs to make jackscrews at the back corners for elevation. You can kind of see one of them in the back of picture 2. I made clamp pieces out of some ash and mesquite to clamp the lower table to the lathe ways in the same manner that the tailstock and toolrest do. I added the strips on the underside just to position the lower table on the lathe to make it easier to get the clamp pieces engaged.
Once I had it made I cut some shopmade veneers out of a piece of mesquite that I had milled and dried. I cut them with the setup shown in picture 3. The thickness is governed by the distance between the blade and the rip gauge roller. In this manner you can cut one veneer, index the upright fence over, and cut another without having to joint the piece in between because the jointed face stays against the upright fence. Bob Simmons covers it here. I cut them to about 100 thousandths and then sent them through this thickness sander a few times to remove the bandsaw marks and take them down to about 80 thousandths.
The sander seemed to work quite well and was very well behaved. It seemed to have plenty of power. This Nova 3000 has a 1hp DC motor. This type of sander needs to always run such that the stock is being fed in the direction opposite the motion of the sanding drum, which in this case means that the stock gets fed in from the back table and exits on the front table.
My dust collection system for this is that it sits next to the open garage door and I use a box fan blow all the dust out the door. That’s probably how I’ll keep it because it’s so easy and it works so well.
-- Bob Anderton - Austin, TX - Nova 3000 lathe, Alaskan Mark III mill, Husqavarna Saw