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  1. toastedhead

    Breaker Failure on 1000HP drive unit

    Here are some pics of the failure. What could cause this or what are some of the modes of failure? Some information - Its 480V main drive unit. The failure occurred on a model 140-R6 molded case circuit breaker. The failure occurred on the line side between L2 and L3. The back of the input...
  2. toastedhead

    380/60hz motor on 380/50hz circuit

    So knowing what I know about electric motors, which is nothing, why wouldnt this work with a VFD? Can I just "turn the knob" on the VFD to give the motor the 60hz its looking for to negate the 17% loss I would normally occur without a VFD? My bet is its not that easy since nothing is that easy.
  3. toastedhead

    Electric Clutch

    Who do you guys use for electric clutching pulleys on a belt drive system? We have a diesel engine belt driving a vacuum pump and a wash down pump but we dont want the wash down pump running all the time. We'd like to have it swtiched on an electric clutch so the operator can turn it on and off...
  4. toastedhead

    Electric Motor Torque Measurement

    Ok, is there a better way to measure torque that an electric motor is putting out than using a $5000 dollar load cell? What we have is a test bench with a 150hp electric motor directly coupled to our rotary lobe blower. Im not entirely convinced that the output being displayed on the motor...
  5. toastedhead

    Mercury Manometer

    Does anyone know where I can get some mercury to refill my manometer?
  6. toastedhead

    Q235 Material

    Ive got a competitor that selling some product at about half of what I am. I dont know why. But he is using Q235 steel. What is it? Im guessing its a Chinese import. But what the make up of it and it engineering properties? I want to be able to tell my customers that my product is better...
  7. toastedhead

    Simple Strengths of Mat Question

    Ive got a plate - 1/4" thick carbon steel. It holds a hydraulic motor and is mounted by 4 3/8" bolts to a rigid body. I want to know what it would take to permanently bend the bend plate. Its been aboout 10 years since Ive done a strengths problem - so dont taze me. The plate is drawn in...
  8. toastedhead

    Abrasive Flow Machining

    My company just purchased a Dynaflow AFM. Its used. It appears to be fairly old because the control panel is all push buttons, no HMI. Can anyone steer me to a manual of some sort or directions on how to use it?
  9. toastedhead

    G3000 Gray Iron - School me on it

    We're going to manufacture some brake rotors here for the owners personal race car. Ive determined we're going to use G3000 cast grey iron per the SAE standard for the alloy. I have some questions regarding stress relieving. From what I understand - you stress relieve the iron prior to...
  10. toastedhead

    ABB AC Drive - Model ACS550

    I want to run this unit through a PLC which isnt the problem. One thing I want to do is be able to control the motor speed manually with a pot through the PLC. Does anyone know which input this is on the the ACS550 drive?
  11. toastedhead

    Liquid Level Indicating

    Im looking for a liquid level indicator for a new test bench run by a Micrologix. I cant seem to find something that is capable of measuring a 15 oz difference in fluid level. The problem Im finding is that they can cost upward of a grand - not feasible for what we're trying to accomplish.
  12. toastedhead

    Test Bench Question

    OK, so Im setting up a test bench in my facility. One of the parameters is to hold a certain level of vacuum for a period of time. My plan is to use a gate valve hooked to a linear actuator but my question is how can I do it on the cheap? We do not need really precise postionion of the valve to...
  13. toastedhead

    PLC Data Logging / GPS

    First - I want to put a PLC on a truck to monitor our equipment - 2 temps, speed, vacuum levels. So the application is 12V and mobile - no PC available. I want to log this data. Is it possible to get the data off of the PLC without PLC software. For instance can we record the data to a SImcard...
  14. toastedhead

    Start-Up torque

    Ive got a truck with an automatice transmission. Im trying to figure out how much torque will be delivered to a coupler if I engage the PTO at 800 RPMs. Im trying to work this out - I dont need to know anything about what Im driving do I? I just need to know the power output of the engine. The...

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