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Type: Posts; User: Madis Reivik

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  1. Replies
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    Hello ! VFD-motor connection should be minimal...

    Hello !

    VFD-motor connection should be minimal length.
    Also, disconnection motor-VFD connection when running can mess up VFD
    And as before said, motor and VFD should be tuned accordingly.
    ...
  2. I recommend throwing out trash everyday and...

    I recommend throwing out trash everyday and keeping food in freezer. Remember that even a sandwich crust is a great meal for mice.
    Also, check the room for holes in wall - a half day with bucket of...
  3. I have the shore-meter nearby, i try to measure...

    I have the shore-meter nearby, i try to measure the hardness.
    So, a good bet would be cyl grinder with coarse open aluminium-oxide wheel ? Since I have to buy the wheel, share opinions about grit...
  4. How and what ? Please give more info !! tnx !

    How and what ? Please give more info !! tnx !
  5. I rephrase my question in easier form :) How...

    I rephrase my question in easier form :)

    How can I make round smooth rubber roll ? Turning or grinding ?

    Please help
  6. Hot roll laminator - roll refurbishing

    Hello !

    We use hot-roll laminators here and during use the hot roll gets scratched

    Similar rollers:
    New, Used and Refurbished Lamination Rollers– VitechParts

    I dont know exact material,...
  7. Replies
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    1,673

    Thanks for all answers ! I had no idea about...

    Thanks for all answers !

    I had no idea about the "wheel having some high spots after trueing". But its obvious..
    This explains some lost microns :)

    So, I try the following:

    1) install a...
  8. Inside bore non-digital micrometre gages are not...

    Inside bore non-digital micrometre gages are not very expensive and you can adjust them with gage blocks

    No hope of doing it accurately without measuring in machine.
  9. Replies
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    Since when I located my JS surface grinder near...

    Since when I located my JS surface grinder near the Robodrill mill, it gets lots of usage - i.e. if youre making some steel fixture plates, its much easier to get these flat and parallel using both...
  10. Replies
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    1,673

    How to set Z-zero on surface grinder ?

    Hello !

    Please share tricks of trade.

    I do the following:

    1) Use diamond to make grinding wheel surface flat and clean
    2) Set the zero using i.e. 10mm gage blcok between wheel and "zero"...
  11. Actually, you hold the wire in left hand using...

    Actually, you hold the wire in left hand using small finger, hold tin wire with thumb, hold soldering iron with right hand and fix the connector with right hand small finger.

    I usually do it like...
  12. Thanks for answers. I tried amazoning around and...

    Thanks for answers. I tried amazoning around and also did not find anything. Guess I try using Solid Edge and some simpler FEA. And industrial espionage with google :)
  13. No ideas ? I need a book :)

    No ideas ? I need a book :)
  14. Hi ! I have all the other baths and also,...

    Hi !

    I have all the other baths and also, currently the galv baths are working but they are aged and look fragile, already welded (melted) for repairs. Also I want to rethink the tubing and pumps....
  15. Good book about plating tank construction

    Hello !

    I need to make couple copper-plating tanks (about 600 litres each) and I want to educate myself first.
    Material PP or PVC

    Can someone recommend a good book about tank design ? I mean...
  16. Replies
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    2,900

    We use Shell Dromus BX

    We use Shell Dromus BX
  17. Replies
    27
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    2,900

    My Robodrill is almost 20years old and paint is...

    My Robodrill is almost 20years old and paint is worn only because of mechanical abrasion, which is logical.
    So, its the quality of surface preparation, every idiot can powder coat but surface prep...
  18. Replies
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    4,514

    I meant "damping" unit with small RC values, for...

    I meant "damping" unit with small RC values, for limiting dU/dT and of course this means less noise (even acoustical) and less heating.
  19. Replies
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    4,514

    Actually, RC filter is enough and much cheaper....

    Actually, RC filter is enough and much cheaper. It removes most of high freq components which cause heating and insulation problems.
    GE inverters and probably others too have optional output RC...
  20. Replies
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    3,144

    You're speaking about different things. First -...

    You're speaking about different things.
    First - LPs use frequency correction, which of course does not help quality.
    But I am speaking about loudness compression. Yes, vinyl actually has LESS...
  21. Replies
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    3,144

    Little offtopic, but actually the simplest...

    Little offtopic, but actually the simplest explanation why "analog sounds better" is true in listening music is that vinyl records are usually recorded with larger dynamics while digital stuff is...
  22. Thanks for answers ! Ballscrew is 25mm diam,...

    Thanks for answers !

    Ballscrew is 25mm diam, 10mm lead.

    Of course, it has been working for so long that ballscrew is probably good enough choice. My question is more about the zillion different...
  23. Choice of ballscrew for small repetitive movements

    Hello !

    The Z axis of our PCB milling/drilling machine mostly operates in 5mm (1/4" inch) area. Its worn and needs replacement. So, I think about following problems:

    1) If the movement is short...
  24. Thanks for very good suggestions ! I think...

    Thanks for very good suggestions !

    I think that stoning would be enough.

    My goal is to restore that machine more for stock preparation and occasional punch/shear/bending blade sharpening, all...
  25. Scraping beaten up way end / how long should be the straightedge ?

    Hello !

    I have a big surface grinder (2500mm or 100 inches stroke), which sat unused for 10 years.

    Y way end was exposed and of course some village idiot used way end as an anvil so it has some...
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