Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. plawrence

    Vibration transmissiblity through V-belts

    Olympic, I don't know how big a system you're talking about, but for the most part, yes, vibration can be transferred from the belts and by the belts. I've seen many belts that are overtight and end up transmitting running speeds from driven to driver, or vice versa. Then you have belt...
  2. plawrence

    Too much money; No such thing?

    I would bring it up to make sure everything was properly negotiated and to keep everything honest. And to make sure your benefits, tax deductions, etc. were being calculated correctly. Also, what if it is a mistake and it does go unnoticed for, say, 10 months--that's $5k. Then they want it back...
  3. plawrence

    Exporting MSAccess reports gives poor results, suggestions?

    Or Crystal? Here's a thought: Why do you want people to be able to fool with the numbers? The basic idea behind a report is for you the developer to organize the data in a way your readers can draw a conclusion. If you're only exporting the numbers to Excel so you can graph it, make the chart...
  4. plawrence

    IR thermografic detection of roof leaks

    Roy, You've probably already done your roof scans, but in case you haven't I have a few comments: 1.) Marking roofs is a team effort. First and foremost is safety. You don't want to be alone on a roof where you suspect problems. And then there are the hazards of being that far off the ground...
  5. plawrence

    Software To Create Logarithmic Files

    The best I've seen is Graph Paper Printer at http://webperso.easynet.fr/~philimar/graphpapeng.htm. It'll print any kind of graph paper you can think of--well, at least that I can think of. Patrick
  6. plawrence

    Vibration velocity limits?

    Forget ISO. Anything turning that fast and vibrating that much just isn't right--especially if you're sure it's all balance. Tell your expert the controlling standard is _your_ standard and throw the book back at him. You don't want fair--you want excellent. Your equipment will thank you for it...
  7. plawrence

    On the run misalignment adjustment

    So here's the rest of the story: We're experiencing high 1X vibration on an overhung pump (Ahlstrom ERS-30, 14x12, 1800 rpm). Last week one of our PM guys noticed a bad shake and sure enough, it had jumped from 0.23 to 0.95 ips. We shut the system down, pulled the runner and found nothing in...
  8. plawrence

    Vibration velocity limits?

    I'm not sure about generators either, but most of our motors (900-3600 rpm, 25 hp to 800 hp) run below 0.15 ips--and that's coupled to equipment that's running from 0.2 to 0.4 ips. If the generator is running 0.75, what's the equipment around it running at? What's the spectrum look like? Patrick
  9. plawrence

    On the run misalignment adjustment

    Can you safely place shims under motor feet on the run by loosening one foot at a time? Patrick
  10. plawrence

    Running a macro through a command button

    When I create a button, a box pops up asking if I want to assign a macro. Or right-click an existing button and select 'assign macro.' Then assign existing code or create new code with the name suggested. Patrick
  11. plawrence

    programing reference for excel sprdsht

    Another very good tool is the macro recorder. If you're slightly familiar with any programming language, you'll probably start to figure out how the Visual Basic Editor (VBE) pieces together the VBA. Go to Tools>Macros>Record (or something like that), record something simple like moving one cell...
  12. plawrence

    paper mill thermography

    John's list is very thorough so I'll just comment on a couple of things. We've successfully found: plugs in liquor lines, sludge in liquor tanks, foam levels in soap tanks, bypassed heat exchangers, wet streaks in felts, dryer cans not syphoning correctly, lime kiln brick delaminating, mud...
  13. plawrence

    Motor Sizing

    It's an inline mixer mixing pulp stock (8% by weight) and chemicals. We have other mixers running at 1800 rpm. We're experimenting with some new geometries.
  14. plawrence

    Motor Sizing

    boo, What are CD, k, A, B, d and n? Patrick
  15. plawrence

    Motor Sizing

    What we have is basically a paddle wheel in a 14" process line. The paddles are flat bars (A=0.139 ft²) turning at 900 rpm (what we're thinking so far). With a 6.3" radius, that gives us a tip speed of 49 fps. If the drag force on a paddle equals Cd*(1/2*ñ*V²*A), then I get 675 lb per...
  16. plawrence

    Motor Sizing

    We have an idea in mind for a mixer/paddle that would be inserted in a process stream. Any ideas on sizing the motor to drive it? Any ideas on figuring the hydraulic loads or drag? We're at the very beginning of this. Patrick
  17. plawrence

    RBMware Trend Issue???

    What version of RBMware are you using? I can't find what you're talking about in 4.6 (haven't updated to 4.7 yet). Call customer support at 865-671-4274. Patrick
  18. plawrence

    Excel data to Access

    Turn on the macro recorder and go to Data>Get External Data>New Database Query. Take a look at the code and it should give a pretty good idea of how to set it up. patrick
  19. plawrence

    Excel User Form TextBox

    Without really knowing what you're up to I'll make another guess. An approach I might use would be build a table of water-filled weights per foot with nominal diameters as row headers and schedules as column headers. Use combo boxes to select diameter, schedule and even length. Use the index...
  20. plawrence

    Excel User Form TextBox

    Sounds like you need to use is a combo box or list box. Ask the paper clip for help on "combo box" and read all the information that is returned. The item "About control properties for Forms toolbar list boxes and combo boxes" has an example on how to work with the returned...

Part and Inventory Search

Back
Top