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: *

  1. freddyj

    Question about counterbalance valves

    FYI, the solution I'm eventually going to try out as soon as the parts arrive is very similar to what EdDanzer is talking about. BTW, my speed is relatively slow, which is why I didn't really need a stand-alone motion controller and probably why tuning isn't that difficult. For now I'm...
  2. freddyj

    Question about counterbalance valves

    Its difficult to explain the design without a drawing, sorry. It is actually hollow all the way through, rod and piston is bored out. Similar to a telescopic design only with one extension. It sits on the floor like a bottle jack and moves PM compaction tooling up and down. Time does not...
  3. freddyj

    Question about counterbalance valves

    I appreciate the comments. All of you guys are great, the feedback is priceless no matter the viewpoint. Figured I'd fill you guys it on my current status. I've picked up on a few basic hydraulics concepts that have caused me to criticize the design of my cylinder. The tolerances are...
  4. freddyj

    Question about counterbalance valves

    Yesterday I removed the counterbalance valve from the circuit to see how it would operate, so now both lines are going straight to the valve. I didn't mention that I am using a +/-10V proportional valve that uses positional feedback and a PID algorithm from a controller to precisely move the...
  5. freddyj

    Question about counterbalance valves

    Hydromech, you are the first person to tell me that counterbalance valves have no pilot ratio. Everywhere I've looked so far (vendors, manufacturers, literature, etc.) seems to contradict that statement. However, everything else you stated helps alot. I was thinking of buying the 10:1 but...
  6. freddyj

    Question about counterbalance valves

    My question related to the back pressure produced by the valve. From what I've learned so far on my own is that the Pilot ratio determines how much pressure is going to unseat the pilot and along with the bias spring determines the amount of back pressure that is maintained while the pilot is...
  7. freddyj

    General Question About Combustible Materials

    And you know what, as far as that goes I've learned the hard way that you can't have one without the other. Is it that obvious?? Check out our website: http://www.utronkinetics.com/technology.html
  8. freddyj

    General Question About Combustible Materials

    Thanks Kyle. I kind of figured that. Actually what I'm doing now is very similar to what you suggest, figured premixing would make the output more consistent by eliminating the potential error from waiting on sensors, pressure regulators, valve switching, etc. Not to mention speed up the...
  9. freddyj

    General Question About Combustible Materials

    Is it possible to acquire a premixed methane/air compressed bottle? In the same manner of purchasing a bottle of propane or a bottle of methane. I know its probably extremely dangerous and I'd initially assume that no one supplies such a thing but this is actually a precursor to something...

Part and Inventory Search

Back
Top