I think it has to do with surface pressure-15 cu in compared to 12 cu in of cutting surface. Theoretically 4 would cut better,they will also wear faster. Cant say I have noticed any difference in finishes whether you run five or four diamonds. I like to run four diamonds on our machines even on larger pad drivers.For me its just easier to place four diamonds on the pad driver than five. Our machines run about 130/135 lbs we run spacers on our diamonds and use coarse fiber pads to remove picture frames.
There is really no difference, I prefer the cut you get with 5 pad .
Why do you want to weight your machine. Are you cutting lippage? This si the only time I recommend weight and then I only recommend 20 to 25 pounds depending upon the stone.
In normal honing, by adding weight will do two things, 1. Wear out diamond faster diamonds are made to cut weight wears out diamonds. 2 you will increase the amount of picture framing.
John E Freitag
The Stone & Tile School
From: Tony Warney [mailto:firstname.lastname@example.org]
Sent: Tuesday, September 11, 2012 12:46 PM
To: Stone and Tile PROS Technical Support
Subject: [sccpartners] Resin Pads
I have been hearing that using 4 3 inch diamond resin pads cuts faster than 5. Is this true and why? Also does anyone have any ideas on how to make your own weighted plate for a floor machine?