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  1. mackconsult

    Killing power steering pumps

    So I use early 90's power steering pumps belted to a 4 HP electric motor to pump WVO into my centrifuge. It also pumps my clean WVO through a filter so that I can dispense it to my car. At not time is it ever high pressure, its just flow .... About every 6 to 8 months I have to go to the junk...
  2. mackconsult

    Using POTS for VOIP

    So my father in law upgrades his comcast so that he gets more high definition television, and VOIP. Unfortunately this caused a problem with the mother in law. So lets back up to what they had before installing this upgraded service. Before the upgrade: The cable modem that provided their...
  3. mackconsult

    stainless tube sliding inside another stainless tube

    I have taken over a job where I need to have stainless tubes slide inside other stainless tubes for a marine ladder application. The guy that designed this up didn't do a very good job of thinking about it. The top flare interferes with the inside of the mating tube as well as you can see he...
  4. mackconsult

    I am stumped; hydraulic circuit create overflow situation

    I collect and process WVO for use as a fuel in my sprinter van. During the filtration an effective way of cleaning the WVO is to heat it up and centrifuge it. Previously this OC20 pressure driven centrifuge has worked for me. At that time my return was just hung over the collection bowl...
  5. mackconsult

    Finding vertical CG of a large box structure

    We have mfg a large box structure that we need to find the vertical center of gravity. We just shipped it out and have access to it on the other side of town. What I am looking for would be a way to to estimate the vertical center of gravity location on it. The base of it is structural so we...
  6. mackconsult

    How to speed up a motor

    I bought this centrifuge on ebay a few weeks back. When the rotor is not attached to the shaft the tachometer will wind all the way up to about 9k rpms. With the bowl on and WVO going into the centrifuge I only get about 4.5k rpm's. I put this pdf together that describes the electrical system...

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