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 MintJulep 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: *

  • Users: charland
  • Order by date
  1. charland

    useless conundrum

    Hi guys, This has been rattling around in my brain for some time. It's strictly anecdotal but bothering me just the same. Why does my wife's cigarette smoke get pulled out of the car window when I'm driving? Bernoulli's law states that a fluid at a higher velocity will have a lower pressure...
  2. charland

    need your advice taking a course

    After using SolidWorks for more than 1.5 yrs I took the essentials course. There were quite a few things that I already knew but I also learned about some bad habits that I had. Some of these bad habits were the root of little "glitch" mistakes that didn't make sense to me. My...
  3. charland

    motor speed control

    Gentlemen, I am in your debt. Thank you Charlie
  4. charland

    motor speed control

    Using a scalar drive VFD: wouldn't this be similar to picking an off the shelf, AC motor and just selecting the correct pulley ratios to get the speed I need? I can get a custom pulley machined if I need something between the commercial sizes. The way I understand it, an AC motor works off of...
  5. charland

    motor speed control

    Thanks Keith, I forgot to mention one last part. It runs on 240 hour cycles. Do VFD's have problems with sustained run times? Also, any recommendations on VFD's?
  6. charland

    motor speed control

    Hi guys, My apologies if this is a simple question that has already been answered but I wasn't able to find anything helpful in the archives. I'm designing a glorified dryer. The point of this machine is to tumble clothes at a specific speed over a specific time to condition them for other...
  7. charland

    24VDC boost to 12VDC truck

    Thanks to everyone for their input. I think we'll switch out the starters for 24V and run the rest of the 12V stuff off of a converter as suggested.
  8. charland

    power reading in novelty generator system

    Hi OperaHouse, No doubt. This will be a statement for the purpose of discussion. Similar to the way that the recent Earth Day "lights off" hour had no real impact on Green House gases but still caused dialogue. We're counting on 50 W per person as we expect out of shape people and eight year...
  9. charland

    24VDC boost to 12VDC truck

    Perhaps I don't understand how this can be used. We have 24V and need to power a 12V system. The 24V system could be anything from anywhere so we have no control on that equipment. An additional piece of info is that the starter draws from 100 to 800 amps while the rest of the vehicle...
  10. charland

    power reading in novelty generator system

    I want to keep this as simple as possible considering our customer doesn't have much funding and they are only looking to make a simple statement about energy awareness. My plan was to provide a box with electrical outlets. Say 9 in total (all standard 120 VAC, 15amp) 4 from power provided...
  11. charland

    power reading in novelty generator system

    I have an application where my customer wants to have a "Green" musical event. The idea is that there will be a number of cyclists generating power with some kind of meter reading the power generated and then comparing it to the amount of additional power taken from the grid. I want to know if...
  12. charland

    24VDC boost to 12VDC truck

    We have built some military vehicles that operate on 12V but have 24V capabilities. We've done this by using a battery bank with some of the circuits coming off of one set of batteries wired in parallel (12V) and then the other circuits coming off both of the sets of batteries wired in series...
  13. charland

    VFD vs Softstart

    Something to consider about the pump. You will need to control the VFD using data from the plumbing. If it suits your system, you can simply use a pressure transducer and a pressure accumulator. A PLC will speed or slow your pump to maintain the pressure in the accumulator. If you don't want...
  14. charland

    unloader valve

    OK, so if I have a 4gpm pump at 1000 psi, can I use 2 gpm at 1000 psi and have the other 2 gpm going through the bypass circuit? Or will I lose all pressure once the unloader valve opens?
  15. charland

    unloader valve

    I am designing what can best be described as a carwash system. There is a high pressure pressure pump (positive displacement, piston) and a variety of things feeding off the pump (spray bars, spray wands) and there is no way of knowing what the volumetric requirement would be depending on what...
  16. charland

    trouble with sketches in 2005

    Hi guys, I have turned the OpenGL toggle on, downloaded and installed the most recent video card driver and I'm still getting a slowed performance. Right now, I've been limiting my sketch sizes and using multiple sketches in place of one large one and that keeps things manageable. The video...
  17. charland

    trouble with sketches in 2005

    SolidWorks 2005, SP 02 I'm creating base sketches in assemblies that I then use to generate a full set of parts from, but for some reason my computer gets really bogged down once my sketch consists of about 10 lines or more. It slows when I'm trying to zoom in or out, rotate or pan and then...
  18. charland

    water combiner

    Thanks guys, I think that the best solution going forward is a venturi device and we would need to stipulate an inlet pressure. That said, our customer has decided that they will solve this themselves as they have some employees doing nothing at this particular time so I'm off the case...
  19. charland

    water combiner

    Thanks guys Charlie
  20. charland

    water motor

    Has anyone used a gear pump in reverse as a water motor? Charlie

Part and Inventory Search

Back
Top