frustration with angle grinder

[SandyS]

Hi,
I've been trying to use my angle grinder but I keep getting deep scratches and swirl marks. I use 4 inch diamond discs, starting at 60 grit. I don't have a water feed, so I've tried both submerging the glass in water and just occasionally spraying water on the glass. The pieces are mostly flat, sometimes a slight curve. I'm prepping the surface for drop molds or slumping.

Any ideas on what I'm doing wrong? I'd hate to go back to hand grinding, it's a very long process.

Thanks
Sandy

[Ed Cantarella]

Hi,
I've been trying to use my angle grinder but I keep getting deep scratches and swirl marks. I use 4 inch diamond discs, starting at 60 grit. I don't have a water feed, so I've tried both submerging the glass in water and just occasionally spraying water on the glass. The pieces are mostly flat, sometimes a slight curve. I'm prepping the surface for drop molds or slumping.

Any ideas on what I'm doing wrong? I'd hate to go back to hand grinding, it's a very long process.

Thanks
Sandy

Sandy - 60 grit is massively aggressive.

I'm curious - what are you "cooking" your glass on that is causing you the consternation that they need to be smoothed so much before the slump or drop?