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Re: [ATM] (not) grinding with diamond
I would not speed it up, you are problably speading water around at a
good rate now :-) and it would not speed the rate of cut.
Douglas S Angle wrote:
>James Crombie wrote:
>
>
>>The new blade may be clogging and need to be cleaned with a aluminum
>>
>>
>oxide
>dressing stick to expose the diamond grit.
>
>I tried this on both blades. The diamond easily cut through the dressing
>stick. It also easily cut a piece of scrap glass held freehand against
>the cutting surface.
>
>
>
>>Try using a permanent marker on the blade to see if there is any rubbing
>>
>>
>
>of the steel or aluminum of the blade on the glass.
>
>I haven't tried marker yet. There are no wear marks on either the steel
>or aluminum blade, except possibly right at the edge where the blade meets
>the diamond. I was expecting that the blade would only cut on the extreme
>edge, so this portion wouldn't be in contact, but there may be enough flex
>in the system. I'll try the marker tonight to get a better idea of where
>there's contact. If it is rubbing on the non-diamond portion, what do I
>do about it? I undercut as much as I could on the second blade, using a
>scraper on a wood lathe. I don't have the means to machine the steel one.
>
>
>
>>Normally on a surface grinder this blade would run at 1500 -2000
>>rpm and would grind very small amounts, .0002" per pass.
>>
>>
>
>Should I speed it up?
>
>Scott Milligan wrote:
>
>
>>I suspect that the diamond matrix has become clogged with glass frit,
>>
>>
>and
>
>
>>needs to be dressed to return to the initial performance you say you had
>>gotten.
>>
>>
>
>See above
>
>
>
>>Pyrex is somewhat notorious for clogging up diamond tooling.
>>
>>
>
>Good to know because the next job will be pyrex. However the current one
>is plate.
>
>Thanks,
>-Doug
>
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