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Type: Posts; User: Mark Rand

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    That all sounds good. I think the cast iron...

    That all sounds good. I think the cast iron rounds may be less work than the 'fabricated' lap. (He said the after one whole week of experience :nutter:)

    I'm using an autocollimator. I did do one ...
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    I can't help with SiC abrasive, but I was lapping...

    I can't help with SiC abrasive, but I was lapping my 600x900mm surface plate last week, using a 300x450 cast iron plate as the lap. With that lap size, 40-60µm diamond grit cuts very fast, 30-40µm...
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    I didn't realise that NiCd batteries were still...

    I didn't realise that NiCd batteries were still available except for military applications!
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    Thank you very much for the link to your code. My...

    Thank you very much for the link to your code. My C was good 25 years ago, but I only did graphics in HP Basic and not on any unix or windows machines, so that is a great help to me.

    It has been a...
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    I've also got an autocollimator, a stock of λ/20...

    I've also got an autocollimator, a stock of λ/20 mirrors that I got aluminised and a couple of cast iron surface plates to re-scrape and use as laps on my surface table. But I have not used it yet.
    ...
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