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Recent content by exeng

  1. exeng

    Cold Electroless Dip for Free Machining Steel

    Thanks for that uncelsyd. In your experience, do the Pen-dip products get washed off or diluted by other oils, for instance mineral oil. Do use the pen dip or pen dip super for dewatering after aqueous coolant machining ?
  2. exeng

    Cold Electroless Dip for Free Machining Steel

    I am trying to find a cold (if possible) electroless dip to give a little corrosion protection to a free machining steel like 1215. I would like it to be as straight forward as possible so I could do it in house without too much difficulty. It needs to be as cheap and cheerful as possible but...
  3. exeng

    Inductance Versus Resistance

    Can anyone advise me why the Inductance of a solenoid should change with rise in temperature. Of course the resistance would change with temperature but I observe a change in the inductance measured with an LCR meter depending on the resistance. Is there a formula which relates the solenoids...
  4. exeng

    BH curve variance of AISI 1215

    Thanks all for the advise. Could anyone recommend some good reference manuals/books for this field ?
  5. exeng

    BH curve variance of AISI 1215

    Thanks all for the input. What kind of adjustment would be the norm ? Something like a matched coil winding or feedback through an LVDT perhaps? What other options would be pratical ? For precision solenoids I'm finding it difficult to find any literature quoting manufacturers normal/precision...
  6. exeng

    BH curve variance of AISI 1215

    Thanks MagMike, I've been getting a spread of around +/- 5% up until my last batch of prototypeing at which stage I got a spread of around +/-10% at the maximum field intensity. You are right in saying that the materials aren't fully saturated at least in-so-far as not all the components are...
  7. exeng

    BH curve variance of AISI 1215

    I'm trying to find out what kind of tolerance/consistency you could expect to get from one lot/cast of steel to the next. I'm working with AISI 1215 to produce a proportional linear solenoid and I am having trouble maintaining a narrow spread on the force output performance. I know that...

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