Recent content by jclough

At the risk of sounding foolish....Is there an easy way to draw a parabola?

could anyone tell me if there is a difference between start and run capacitors...capacitance and voltage being equal.

Thanks rgerk. You've got the idea. The shelves are standard 4 ' high units with probably as much as 500# on them. They are sitting on a 6" thick prestressed concrete mezzanine rated at 200lbs/ft2. I doubt shear stress generated by the shelving would cause the legs to punch through. What do...

Does anyone know any tricks?

My Boss, a Mech Eng. is convinced that placing shelving feet on small steel plates will reduce the change of overloading our concrete mezzanine. This doesn't make much sense to me but, my Elec eng dergee just didn't prepare me to explain why. Can anyone give me a hand?

Please help... I remember using some quick release nut on various fixtures. The nut had a tapped hole of some appropriate thread with a second thru hole drilled at an angle (approx. 20 deg). The result was half of the threads missing on oppsosite sides at opposite ends of the threaded hole...

Electricpete... Have you completed your repair yet? If not here are some tips gleaned from many years in the motor manufaturing business. 1. Don't bother with this whole heat shrink process. You are at risk of creating more problems than your avoiding. When pressing a new shaft into a new...

What do you consider inexpensive? Put up some specifics and I'm sure we could come up with something.

Boy you guys!!! Wish I knew how to find people like you. I've got verifyable motors/drives/controls/PLC experience plus...I would love to travel. I'm not trying to solicit anyone here for a job but where is a good place to look? Jon

Running a unipolar VR stepper with a bipolar drive isn't a problem.

Thanks cockroach...just what I was looking for! Gave you a star. Jon

I was hoping some of you mechanical guys could help. I'm designing a fixture and need to quantify and compare the amount of force a 3/4-10 UNC mild steel and a 1/2 -10 mild steel acme thread can develop before before failure. Each of them will be used to apply a static clamping pressure. I will...

I suspect that any efficiency gains you get by using a three phase motor over a single phase motor will be lost in the inverter or converter. One may want to consider the cost of the phase converter also. Long story short...If you aren't supplied with three phase power from the utility, the...

Is there a correct method of calculating distribution probabilities for one sided features such as shaft runout?

Copied this from another forum. Someone suggested that a different forum might help.... Ran across something I don't understand today. Had to perform a megger test on an endcap per customer specs. What is being checked is the resistance between a hardcoated bearing bore liner and the endcap...