firstname.lastname@example.org wrote:I understand the loose grit method and have used it a bit with good success. However, I am a little puzzled by the sequence in the video where sections of the flat lip of a dropped bowl are scored, broken off and the bowl taken to the loose grit station. At first you can see that the ragged edges are there as it is beeing worked in the grit. Then those edges are suddenly gone in a following section, as if grinding vertically in the loose grit removed all the glass remaining from the scored/cut lip.
That's a long way down, does the video suggest grinding in loose grit to remove the remaining horizontal lip?
Could this same result be achieved more quickly by scoring/cutting as shown and then grinding down the remaining outside sections on regular rotary grinder? I assume that if this is possible you'd need to be careful not to stress the sides of the bowl against the grinder.
yes, you can score/break out, and/or use a regular diamond grinder to get rid of jagged edges. it's very hard to keep a planar surface on the rim though, since the contact point is so small. if you're concerned about doing that (and i have created non-flat surfaces doing this, causing long hours to fix), then using the lap/grit would be better, albeit slower.
i've also used the side of my wet saw blade for a grinder surface, especially on large and very thick slabs (>1"). be sure not to press too hard, especially on the thinner blades, to prevent a set in the blade if it gets bent.