Search Results - Practical Machinist - Largest Manufacturing Technology Forum on the Web
Close
Login to Your Account

Search:

Type: Posts; User: thermite

Page 1 of 60 1 2 3 4

Search: Search took 0.19 seconds.

  1. Replies
    25
    Views
    1,197

    There IS NO "exact answer". It is a variable...

    There IS NO "exact answer". It is a variable speed, variable torque, adaptable workload environment and "CEMF exists".

    "Run what you GOT", IOW.

    And I'm not "guessing".

    I happen to be aware...
  2. Replies
    25
    Views
    1,197

    That may be the "theory" in a classroom if you've...

    That may be the "theory" in a classroom if you've never had your hands (and meters & "scope) on a "real one".

    In the "real world" the DC motor and DC Drive are far too indifferent to give a damn...
  3. Replies
    120
    Views
    7,022

    NOW it works. I have ALMOST enough info to...

    NOW it works.

    I have ALMOST enough info to generate a 'proper' schematic, a functional / logic block diagram. And a probable wire run that you will be able to vet.

    The RPC maker's diagram blurs...
  4. Replies
    25
    Views
    1,197

    DC motors are "ultimately" the same animal as AC....

    DC motors are "ultimately" the same animal as AC. Electromagnetic poles must attract ELSE nothing MOVES.

    But they go about it with "local", internal, switchover, commutator or solid-state...
  5. Depends. "Quality" of China's high-hull-count...

    Depends. "Quality" of China's high-hull-count undersea fleet isn't the latest nor greatest:

    China Submarine Capabilities | NTI

    Does China Have an Effective Sea-based Nuclear Deterrent? |...
  6. Replies
    120
    Views
    7,022

    Please check. The wiring layout / functional...

    Please check. The wiring layout / functional block diagram is in error. Cannot function as shown.

    You have two of the three RPC leads tied to the same "L2" termination.

    There is no third phase...
  7. ?? Functionally, he is nowt but a wind-up...

    ??

    Functionally, he is nowt but a wind-up typing-toy.

    Not up to the level of understanding where anyone sane COULD "argue" with him.

    Even then.. why wuddja wanna?

    Kinda like registering a...
  8. It seemed to be at one time. No longer. Not for...

    It seemed to be at one time. No longer. Not for quite a while, already.

    That their Government is actually just one more Feudal-System flavour of organized crime isn't all that different from any...
  9. Replies
    25
    Views
    1,197

    "What you can get" is right in the drive's...

    "What you can get" is right in the drive's manual. No drive maker - major or minor - has any interest in trying to boolshit Big Corp or national Defense establishments.

    So the manuals are...
  10. Replies
    25
    Views
    1,197

    Yes, they (All) can. Even the tiny ones have...

    Yes, they (All) can.

    Even the tiny ones have ramp-up rate, ramp-down rate, sensitivity and stability trimpots. Or equivalent PLA stored numerical settings.

    Basically, you TELL it how much...
  11. Replies
    25
    Views
    1,197

    Ned's giving us better value than readings. Same...

    Ned's giving us better value than readings. Same as Mark had done.

    Proof of actual chip-making.

    Their Amperage draw will depend on how aggressive the cut. As it always does.



    Same again....
  12. Replies
    25
    Views
    1,197

    Noise of a Diesel is not hard at all to tame. ...

    Noise of a Diesel is not hard at all to tame.
    Exhaust pollution is not easy to tame.

    Getting the cost down to compete with a grid that has already added wind and solar on an "industrial" scale...
  13. Replies
    25
    Views
    1,197

    No, he will not. He would be worse-off, not...

    No, he will not.

    He would be worse-off, not better.

    He has just about exactly enough power to operate a single-phase 10/12 HP DC Drive that can run his existing 20 HP DC motor at roughly HALF...
  14. Replies
    14
    Views
    837

    I hear yah, ONE thermal should need two leads if...

    I hear yah, ONE thermal should need two leads if it is meant for supervisory device response rather than inline/local. They can be MUCH lighter if utilized to open the hold-in on a mag starter or...
  15. Spot-on. My case? I'm NOT changing Voltage....

    Spot-on.

    My case? I'm NOT changing Voltage. Not significantly, anyway. But would use Delta-Wye even so.

    I actually NEEDED the "drive isolation" feature to tame a passle of rude-bugger...
  16. You have the wrong transformer for that goal is...

    You have the wrong transformer for that goal is what.

    If you want a re-derived Neutral at the secondary?

    You need a Delta-Wye transformer // 'drive isolation' transformer specifically wound...
  17. Replies
    14
    Views
    837

    That's about $150, minus $50, pus $150, vanilla...

    That's about $150, minus $50, pus $150, vanilla used 4-pole 2.2 KW // 3 HP. $330 to $400 gets you a brand-new one. A 3 kw can probably be had as a bolt-up for a skosh of reserve.

    What's your shop...
  18. "Fixed it" how? Cheaper faster? Bad choices...

    "Fixed it" how? Cheaper faster? Bad choices made sooner? More screeming-meemie alleged gen-sets scrapped more often?

    Trump is out of office. The only "fast" we are seeing is the astonishing...
  19. You watched videos. "Seems like". Maybe". "Ive...

    You watched videos. "Seems like". Maybe". "Ive heard". "I see that..". "Might not be.."

    Some among us have lived on REAL gen sets for over 60 years. "Mission Critical" 24 X 7 X 365 plus-plus,...
  20. If you want Wye @ more than 208, nominal? That...

    If you want Wye @ more than 208, nominal? That ain't hard.

    Look for a "Drive Isolation" transformer. The Wye side is NOT 208/120.
    I do not have 4XX, so my one is an EGS/Hevi-Duty 27 KVA. 1:1...
  21. The taper IS your "holding device". It is also a...

    The taper IS your "holding device". It is also a "driving" class of taper.

    Last quartile of the 1800's ... Morse taper had been proven to hold well for "inline" force, as is the case with drills,...
  22. Extend your DP's quill. See if it has an...

    Extend your DP's quill.

    See if it has an oblong slot or azure clear through both sides ... where a "wedge" AKA "drift" is inserted to release MT goods.

    If no such azure, come back and explain...
  23. Avoid it. They just told you WHY. What's...

    Avoid it.

    They just told you WHY.

    What's not to like about their honesty?
  24. You should get the ones the clever Chinese make...

    You should get the ones the clever Chinese make for rich Kalifornios.

    Those will keep the house cold with no power at all for partial-day rolling blackouts.

    Mind, you'd have to pay double for...
  25. One might suspect an enterprising pragmatist...

    One might suspect an enterprising pragmatist could even craft a successful web site on that concept..?

    Call it "practical.." somethign-or-other?

    Oh.

    Wait....

    It's YOU?
Results 1 to 25 of 1500
Page 1 of 60 1 2 3 4