Is this the steel or me

[Bill Thomas]

I was grinding Damascus and I noticed this divot after taking it to 600 grit. I was grinding on a flat platten. The low spot is in the middle of the blade with lower grit marks. Thanks!

 

[Rhinoknives1]

I’m on a phone so can’t see it that clearly, “Flatten your Platen” and see if you can get it out!, if not, it’s the Steel

 

[Bill Thomas]

Thanks Rhino,
I made the assumption it was either me or the steel because the low spot runs length wiseand it is only on one side of the blade. It defiantly could be the platten or me, but I was wondering if it was a void in the steel layer?

 

[Bill Thomas]

I’m on a phone so can’t see it that clearly, “Flatten your Platen” and see if you can get it out!, if not, it’s the Steel

Disregard my second post, I think I just figured out. You were right! I just inspected my platen and noticed a high spot of what appears to be glue. I think it came from the previous belt, because it broke at the glue seam and I had put a new belt on and that was when the low spot appeared. I learn something every time I'm in the shop, too bad a lot of the learning comes from mistakes.

 

[Rhinoknives1]

Disregard my second post, I think I just figured out. You were right! I just inspected my platen and noticed a high spot of what appears to be glue. I think it came from the previous belt, because it broke at the glue seam and I had put a new belt on and that was when the low spot appeared. I learn something every time I'm in the shop, too bad a lot of the learning comes from mistakes.

Almost all learning comes from mistakes along with new discoveries as well! There is always more to learn, I use a process of elimination, if the platen is freshly trued and there is no crud, glue etc, a fresh belt is then in order and if not those than there is void in the steel...stay safe & have fun!​

 

[Bill Thomas]

Almost all learning comes from mistakes along with new discoveries as well! There is always more to learn, I use a process of elimination, if the platen is freshly trued and there is no crud, glue etc, a fresh belt is then in order and if not those than there is void in the steel...stay safe & have fun!​

Thanks for your help. I may have ruined another blade if not for your advise. Im thinking about doing a hollow / flat grind on this blade to get down to the low spot. I'll try a few flat passes but I think I'll end up shortening the blade width too much by the time I get it flat. Have a great day!

 

[Rhinoknives1]

Thanks for your help. I may have ruined another blade if not for your advise. Im thinking about doing a hollow / flat grind on this blade to get down to the low spot. I'll try a few flat passes but I think I'll end up shortening the blade width too much by the time I get it flat. Have a great day!

You are welcome! Many helped me when I started and there is always more to learn!

 

[Bill Thomas]

You are welcome! Many helped me when I started and there is always more to learn!

It had to conced on this one, it had me beat. You can see the dimples on the unmarked side. I did the best I could with what I had and did not want to spend to much more time on it. Thanks again.

 

[stezann]

Isn't it there a chance that you tryied to roll the edge on the slack portion of the belt between the platen and the top wheel?...hitting the top of the platen by mistake?

 

[Bill Thomas]

Isn't it there a chance that you tryied to roll the edge on the slack portion of the belt between the platen and the top wheel?...hitting the top of the platen by mistake?

No, it was a high spot of glue on the platten. I think I know why there was glue on the platten. My top wheel was a tiny bit behind the platten and I think it put excess friction on the belt and melted the glue.

 

[Bill Thomas]

No, but thanks for reminding me not to do this. it was a high spot of glue on the platten. I think I know why there was glue on the platten. My top wheel was a tiny bit behind the platten and I think it put excess friction on the belt and melted the glue.