jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
|
Post by jamesp on Oct 7, 2016 6:19:36 GMT -5
Fooling around with this 13 inch 200 grit diamond pad. For polishing concrete and granite floors. Cheap @ $23 Pencil would not penetrate under a lot of force. This is a tough durable pad. Pad similar to a fast draining sponge when pulled out of water. Stays wet though. This blob of water left a wet spot. Once wet, stayed wet. Took some rubbing to work water into pad. Polished quartz tumble Not so polished quartz tumble after 60 seconds rubbing at medium pressure Close in, grinding face Edge view, diamonds sparkling. The pad must wear in use as the diamonds are full depth. Interesting Useless for doing flat slabs. Due the way it deforms in the center of contact and does not hit the abrasive. Note center is not abraded. The rubber pads do not have this problem. They are the opposite; they are hard and not friendly with curved surfaces. Just flat. However these pads may be coup de gras for cabs, tumbles and soft arcs. Think el cheapo expando wheel.(I think expando wheels conform to curved surfaces ??) I could see shaping a cab on a single coarse 80/100 grit cab wheel and all finish done in a jiffy with these pads 200-400-800-1500-3000 quick change lapper style. One lift off/drop on pad lapper plate, six $23 thirteen inch pads, presto. 5 finish step cab finishing machine with one rotating lap face. Me no cab person, just thinking out loud. If these pads are designed for 10,000 sq ft of granite/concrete floor that must equal like 1 million cabs. Check large deformation: Return from deformation after 60 seconds. A temporary shape could be retained radially(and temporarily) by pushing the cab into the pad as the pad rotated to assist abrading a curved surface like a cab.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
|
Post by jamesp on Oct 7, 2016 6:22:38 GMT -5
A machine for the job, 13 or 17 inch lapper ?? Looking at a 16 inch tank head with legs tall enough to have a vertical shaft running up the center. 16 inch tank head for 13 inch pad or 18 inch tank head for 17 inch pad. Probably go with 18 inch, that way a 13 or 17 inch pad could be used. Motor mount and shaft bearings mounted on 2 vertical plates welded to bottom of bowl. Those bowls are rigid. Vertical plates can be welded directly to the bottom. Spin pad at 800 RPM, conservative. Even slower. 3600 rpm on 4 inch pad = edge speed 3730 feet/minute--or-- 800 rpm on 13 inch pad = edge speed 2721 feet/miniute, 17" 3558/minute. At 13 to 17 inch diameter 400 rpm would do some fast work. Manage the water with a slinger on vertical shaft just below bowl and baffle to manage it. A partial cover over top to keep mist under control. Lapper plate may have to be made in a machine shop. However, a 1 inch bore sprocket can serve as a mounting surface for a polycarbonate(or similar material) 17 inch disc. Something like this 24 inch tank head fire pit:
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
|
Post by jamesp on Oct 7, 2016 6:28:34 GMT -5
Just brain storming with new diamond technology gone cheap.
|
|
|
Post by toiv0 on Oct 7, 2016 7:35:03 GMT -5
I love a brain that works overtime, I need to go ahead and retire and play.
|
|