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  1. Replies
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    Glad to hear it! From what you have...

    Glad to hear it!



    From what you have written, it sounds like something is wrong with the DRO encoder monitoring. I would simply turn off the monitoring function.

    Here is a good check, if...
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    That's easy to answer. The plate is concave: the...

    That's easy to answer. The plate is concave: the middle is low and the edges are high.

    The procedures for making surface maps like this were first detailed in K. J. Hume, Engineering metrology....
  3. Martin, this made me laugh out loud. From Hi-tech...

    Martin, this made me laugh out loud. From Hi-tech to Hühn-tech :D. Cheers, Bruce
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    Sorry, I didn't see this question until now. ...

    Sorry, I didn't see this question until now.

    Not quite sure what you are asking. If you move the level along a line, and the angle doesn't change, then the line is straight, otherwise not. But...
  5. Thread: Hilma vise jaws

    by ballen
    Replies
    5
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    290

    Thanks for the photo. It appears that the roller...

    Thanks for the photo. It appears that the roller is solid, but that the rotation/retaining pin is a split pin. Is that right, or am I seeing it wrong?
  6. Hi Mark, I just ordered a 20g bottle of...

    Hi Mark,



    I just ordered a 20g bottle of 20-30 micron diamond powder. I hope that's a good compromise between speed and control.



    Respect!
  7. Some advice from a newbie to a newbie: when you...

    Some advice from a newbie to a newbie: when you clamp a piece, always ask yourself: what will happen if the clamping doesn't hold? Will the cutter simply push the piece out of the way and stop...
  8. Thread: Hilma vise jaws

    by ballen
    Replies
    5
    Views
    290

    I have a pair of these but don't use them. When...

    I have a pair of these but don't use them. When I want downwards clamping force, I use a different Hilma jaw attachment, shown here:

    When to use downthrust jaws? When NOT to use them?

    By the...
  9. Hi Mark, thanks for your replies. I remember...

    Hi Mark,

    thanks for your replies. I remember that in post #57, you wrote about your experience lapping your own surface plate. That's exactly what I am trying to do.

    Slightly off-topic... in...
  10. Hi Mark, I don't need to make any rough...

    Hi Mark,



    I don't need to make any rough corrections to the surface plate. The surface plate is concave, and about 12 microns high around the boundary. So all that I want to do is remove...
  11. CalG: thanks for the offer :). Next time I am...

    CalG: thanks for the offer :). Next time I am around VT I would love to see that setup.

    To measure the lapping plates, I superglued three small cardboard pads to the back of each one, then put...
  12. Thanks for all the feedback! I did another...

    Thanks for all the feedback!

    I did another hour of lapping (four more three plate cycles) with coarse timesaver compound. This got rid of all of the machining marks from the lathe, and left me...
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    I thought that during the final passes there is...

    I thought that during the final passes there is almost no force -- this is one of the main advantages of grinding. Hence one should creep up on the final depth, so that there is no distortion at the...
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    Happy to hear that. If it didn't fit I was...

    Happy to hear that. If it didn't fit I was planning to send you one of my used ones.



    Before you install the pins, consider *modifying* the numbering on the plastic insert with an Xacto knife...
  15. Replies
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    My comment was intended for Jagboy69, who is in...

    My comment was intended for Jagboy69, who is in the US. Since you're in the UK, get something like this:

    Model Engineering and engineering tools online from RDG Tools Ltd Home Page (Engineering...
  16. Replies
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    Obviously you should listen to experienced...

    Obviously you should listen to experienced people, which does not include me. But for a bed which is short enough to grind on your machine, I would have thought that the goal should be a 3-point...
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    Next step: get yourself a single-point diamond...

    Next step: get yourself a single-point diamond wheel dresser. Mount it in a steel block, pointing about 15 degrees away from vertical, towards the left, then dress the wheel. The finish you are...
  18. Replies
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    I hope it fits OK. Colt45 told me that there are...

    I hope it fits OK. Colt45 told me that there are multiple keying methods for these connectors, which I had not realised.

    The other two points to be aware of are that the connector you bought is...
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    I think it's called an "M23 circular signal...

    I think it's called an "M23 circular signal connector". Here is an example (assuming that 9-pin male is correct):
    Digikey link
    and here is another:
    RS Components link
  20. Replies
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    You can just replace the connector. If you have...

    You can just replace the connector. If you have trouble finding one, let me know, I have a handful of spares. The color code is:
    1 - green
    2 - yellow
    3 - brown
    4 - white
    5 - blue
    6 - red
    7 -...
  21. I've not had time to work on these recently, but...

    I've not had time to work on these recently, but had a bit of free time today and did a few more A/B B/C C/A lapping cycles. Before moving to SiC, I thought it would be fun to try some of my coarse...
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    Thanks for trying. My only experience is with a...

    Thanks for trying. My only experience is with a mac. What I've found is that if I reduce the JPG quality to make the photo size no larger than about 500kB, then it's displayed large here.
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    Heidenhain scales have an 'ML' value, which means...

    Heidenhain scales have an 'ML' value, which means "Measuring Length". For example the LS803 series (often used on FP2s) have ML values which include 220, 270, 320, 370, 420, 470, 520mm and so on. ...
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    A list of compatible HEIDENHAIN linear encoders...

    A list of compatible HEIDENHAIN linear encoders for the ND960 can be found on page 49 of this manual:

    https://content.heidenhain.de/doku/oma_nd_pt/pdf_files/ND900/ND960/en/28302426.pdf

    One of...
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    Hi Rich, I can't see your pictures as well...

    Hi Rich,



    I can't see your pictures as well as I would like, because they are so small. For a while, I had the same problem with the pictures that I uploaded here, but I was eventually told...
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