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Thanks to all for the good advice. We do have a PLC in the system. I'll use it to control contactors and make it simple for the end users.

I am working on a design in which I have 10 identical 150hp inverter duty motors. I only need to operate 3 at any one time. I was thinking of only using 3 drives and some switchgear to choose which motors I want to run and save money on the drives. We will not need to operate them very often so...

Thanks for the quick response, I am using Panelbuilder 32 and it is a standard PanelView not a PanelView Plus. Since I am using RS Networks to communicate over a ControlNet Network, I thought it would upload/download any settings required automatically in order to make a link. Anyway, thats...

I am having trouble connecting a PanelView 1000 to my controllogix over a ControlNet link. I was able to schedule the items in the network with no problem using RS Networx but I get a module error in the COntrolLogix configuration for my PanelView. The error I am getting in my panelview...

Does anybody know if there is a pre-written FC used for averaging a group of analog values on a continual basis? I have an application where I have qty. 12, 4-20mA signals being input to the PLC (CPU 313C). I need to compare each of the values to the average of them all on a continuous basis...

Thanks for the input, I have considered A333 but the stated minimum in ASTM is 13 ft-lbs so I am not sure I can get a manufacturer to promise that it'll meet the 31 ft-lbs that I need. Does anyone know what kind of charpy values I could expect from A-192. I know the yield is lower but I may...

I am looking for a seamless steel tubing specification to replace ASTM A106 gr. C in a very low temperature application for a hydraulic cylinder. The minimum yield must be similar to A106C and it needs to meet the charpy v-notch test requirements per ASTM A370, 31 ft-lbs average at -50C. The...

THanks to everyone for the tips. We are using a steady rest at the end of the tube to support it. And we have checked for concentricity. We always take a light pass over the threads of the male parts to reduce burrs but I'm not sure about the internal threads of the tube, I'll have to ask the...

We did think of ovality. We checked the bore and major diameters in several loactions to ensure that they were all the same. Also, we cut the threads at a different time than the honing of the bore. You are right though the temperature of the steel does get high when the tube is honed. We are...

Does anyone know a good method to reduce the sharpness of these threads. The edges on the internal threads are very sharp. When we attempt to screw in the mating end caps the threads seem to cut into each other. We would like to round the ends of the threads near the lands. My first thought...

Does anyone know a good method to reduce the sharpness of large diameter threads that were cut on a single point lathe. We have a large hydraulic cylinder tube (21.5" diameter UNC threads) that has very sharp edges on the internal threads. When we attempt to screw in the mating end caps...

Thanks to everyone for the input. Upon further review, I am now thinking that there is a surface roughness problem on the male threads. Or could be that the tips are too sharp, even though they don't come to a point, they aren't rounded like they probably should be. We use our single point...

Hi, I don't know if anyone here will be able to help me but I have a question regarding similar materials galling in a threaded application. First a little background, My company produces heavy load hydraulic equipment. We normally design hydraulic cylinders with the end caps threaded into...