Peter wrote:

quote:

Did you notice there is a new member who posted in the industry connections? Jeremiah Johnson posted a link to this:

I noticed Peter and am corresponding with him privately since I don't think anyone here is very interested in how to start Fluid Power Consulting. I could be wrong but Jeremiah is the fifth person who has asked a similar question on any of the forums in the past 20 years that I am aware of.

If the interest is there I would be happy to post the correspondence with the Forum since my tenure in consulting is about over and there is an apparent need for Fluid Power Consultants all over the U.S.

Also it might help sell my books for the training part of making money consulting. Every little bit helps when Social Security is the only stable income and it may be too soon to getinto the savings.

Peter also wrote:

"Bud, maybe there aren't enough good instructors that can teach a meaningful class."

I think a lot of Fluid Power knowledgeable persons wold step up to the teaching challenge if there were places requesting instructors.

On the other hand it just goes to show how far behind Fluid Power is when an instructor shortage might be a problem.

A nother fellow in my area is now taking over my old customers. BTW he is an M.E. with a good electrical background and is well versed in hydraulics. One of those MechaTronicOily persons.

Peter,
We have been upgrading since the mill was built in 1987-88. The vast majority of our circuits are still bang-bang. The majority of circuits are for either aux. equipment or for pressure conrol-don't have a need for a lot of position conrol. Although great strides have been made in prop and servo valves in the past few years there are still negatives-i.e. sensitivity to contamination and most not having a manual overide. On some circuits where we have gone to the prop/servo type valves we put a manual or bang bang DCV in parallel for emergency use. Maytag

Maytag;

Does "Vast Majotity" come close to 95%???

I have been using that figure since it has been my experience from doing training classes on at least 100 Hydraulic Circuits over the years and many many times that number while trouble shooting non-functioning circuits.

I have come across that dual valve setup on many Servo Circuits also Maytag.

I would say we have about 80-85 % bang-bang with the balance some type prop/servo. Maytag

That is higher than I have been using. However, if I used the local aluminum Rolling Mills, that have HGC as an example, I would have a higher figure for Motion Control circuits also.

Maybe I need to change to only 90% Bang-Bang circuits.