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  1. If you want to keep the costs down, maybe you can...

    If you want to keep the costs down, maybe you can cut away the old gear (even if hardened) with carbide tooling. Or find someone with a cylindrical grinder and grind it off. Then bore out the new...
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    Be sure not to inject grease where way oil goes....

    Be sure not to inject grease where way oil goes. Have you checked that no one else has done this in the past?


    Sent from my iPhone using Tapatalk
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    For a long time the 3-phase power standard in...

    For a long time the 3-phase power standard in Germany and most of the continent was 380V. But then some years ago it was shifted to 400V. So if the machine was intended for 380V then it's worth...
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    Nice machine -- it looks very clean -- is the...

    Nice machine -- it looks very clean -- is the paint original?

    A lot of shops in Germany have a handful of FP1 machines, set up differently. The setup you have, with the dividing head on the...
  5. About six weeks ago I sent an FP1 slotting head...

    About six weeks ago I sent an FP1 slotting head to California via DHL (two packages). Door to door was about 30 days.
  6. DHL from Germany to the USA is summarized here...

    DHL from Germany to the USA is summarized here (click on Zone 5):
    Preise und Produkte fur Ihren internationalen Versand | DHL

    8 Euros up to 2kg if under 35x25x3cm
    16 Euros up to 2kg if larger...
  7. Have you dropped a machine? Or more than one? ...

    Have you dropped a machine? Or more than one? Please tell us about it.

    It has not happened to me so far, but I would like to learn from any mistakes you might have made, so that I hopefully...
  8. What Ross has suggested makes complete sense. ...

    What Ross has suggested makes complete sense.

    An alternative explanation is that one of the photocells has an intermittent connection. The four photocells which measure the two quadratures are...
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    Good point. NBU-15 is rated for D n < 1,600,000...

    Good point. NBU-15 is rated for D n < 1,600,000 where D is the bearing diameter in mm and n is the maximum rotation rate per minute. So for example if the bearing balls are on a 50mm diameter and...
  10. Well done -- that's a nice looking mill -- quite...

    Well done -- that's a nice looking mill -- quite a chunk of iron!

    What was the (minor) transport damage? Are you going to take it off the pallet? Should be easy with some rope and the forklift....
  11. OK, so you have isolated the problem to the...

    OK, so you have isolated the problem to the Y-axis scale. Next step requires a multimeter (cost 15 Euro) set to diode test mode.

    (1) With the diode test function, check that pins 1 and 2 show...
  12. First step: swap the connectors for X and Y at...

    First step: swap the connectors for X and Y at the DRO, to identify if the problem is with the DRO Y channel or with the Y scale.
  13. That was very nice of you to fix it for him. ...

    That was very nice of you to fix it for him.

    On mine one of the 3-pin regulators was cooked, I think it was a 7812 in a TO-3 can. But if the power supply rails are all OK, then I'm sure the DRO...
  14. Yup, power-supply components :). The two...

    Yup, power-supply components :).

    The two broken diodes are part of a full-wave rectifier (or bridge rectifier). From the anode/cathode bands one can see that these two diodes provide the positive...
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    Yes, you can use Isoflex NBU 15, it's what the...

    Yes, you can use Isoflex NBU 15, it's what the professionals (Franz Singer, for example) use on these bearings.
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    The gib screw has an extended flat head which...

    The gib screw has an extended flat head which fits into a slot in the gib. Over time if the gib is moving slightly back and forth, it can wear that extended head, creating substantial play....
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    I believe that the founder Friedrich Deckel had...

    I believe that the founder Friedrich Deckel had two children, Friedrich Wilhelm and Hans. The first son took over the firm after the founder, until the mid-60s. The son of the second son (Hans...
  18. I hope you succeed! Over the years, many people...

    I hope you succeed! Over the years, many people here have tried to get circuit diagrams from Heidenhain and have been told "no".

    Anyway, you can easily fix this without a circuit diagram. Just...
  19. The bad news: I have never found a circuit...

    The bad news: I have never found a circuit diagram for the VRZ-753B. If you find one, please share it.

    The good news: this is easy to fix. First check that the on-board 5V supply is working...
  20. The LS803 scales do have reference points, 35mm...

    The LS803 scales do have reference points, 35mm from each end. However they are ignored by the DRO if the "memofix" switch is in the green position. Even if it is in the red position, the DRO will...
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    The Talyvel 4 was designed to run off either wall...

    The Talyvel 4 was designed to run off either wall power or off a pair of internal rechargable NiCd batteries. These batteries are obsolete, and the internal charging circuit is primitive, so I've...
  22. Hi Ross, As I recall, the 5V supply for the...

    Hi Ross,

    As I recall, the 5V supply for the scale lamps is the same 5V supply used by the TTL logic in the DRO. If it had failed, the DRO would not respond to keyboard input, which uses TTL logic....
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    I needed to replace two broken springs in this...

    I needed to replace two broken springs in this handle and another one like it:

    https://www.practicalmachinist.com/vb/attachment.php?attachmentid=304731&d=1605472924

    At first, I tried to punch...
  24. Here is a diagram showing the internal...

    Here is a diagram showing the internal functioning of the LS803 read head (it also applies to the LS803D, LS903 and LS903D).
    ...
  25. OK, if the DRO is responsive then the power...

    OK, if the DRO is responsive then the power supplies are almost certainly OK.

    Next step: check that the small light bulbs inside the read heads are not burned out. What model are the scales? Are...
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