Any opinions on negative effects to putting a cnc milling center and a mig welder on the same feeder. Both are 460 volts and about 40 amps each. We want to put them on a 100 amp feeder. The welder won't be run that much a few hours a day here and there. Thanks
We have a large piece of automated machinery in our facility that we will be rebuilding. To make the work easier we would like to run multi-conductor cables through the wireways instead of individual conductors to the main centralized junction boxes. These boxes will contain terminal blocks...
Just wanted to get some different opinions here as to the advantages and disadvatages to different methods. This goes back to a previous post I have about a vfd motor problem and the speed fluctuating. We have some plastic extrusion machines with newer vfd's. Both of them have pots that set the...
We purchased a used extrusion machine a year or so ago that extrudes plastic tubing and at that time we found it had a bad variable speed drive. We redesigned the control system somewhat and added a new plc ( which the machine didn't have) and a new Allen-Bradley vfd( not sure of exact model)...
Just thought I would post this here out of curiosity. In our tool and die shop they had a 12 volt car battery sitting on the floor. It wasn't being charged or anything. Someone pulled the plugs off and was filling it with water when the top exploded and blew off. Any idea what would cause this?
Hi all,
Bear with me because I am new to this control/automation stuff. We are building a spiral cutting machine in house and it presently has a Bosch-Rexroth Indramat servo drive with matched 3 phase servo motor. Right now for testing purposes, all we do is go in with a laptop via rs-232 and...
We have a 500 kva internal substation in our plant that are about 6 years old. 4160v to 480/277. The fla of this transformer is 602 amps. The transformer is located in an air conditioned manufacturing area that is very clean. The sub presently has about 6 pieces of machinery on it and about 5...
I have a machine that runs a Versamax plc ( programmed in Versapro) and a Quickpanel view. Both are connected via a GE BEM103 devicenet ncm card. I have created a commreq. in Versapro and have sent it to the module which returns a code of okay " network operation can proceed. My question is how...
I was just wondering what the advantages or diadvantages of each are. Mainly in regards to industrial sensors and controls. Not sure when you would use one over the other. Thanks.
I have a small piece of equipment in the plant. It currently has a 1/8 hp dc motor with 5 leads that go back to a small speed control board. Wires terminate on the armature and field terminals of this board. Now, we need to install a new motor however, when they spec'd it out they purchased a...
Hi all,
Bear with me here because I am new to all this programming stuff. I have a GE Versamax plc with a devicenet network comm. module installed on the backplane. I am trying to set up the comreq. for the module but am a little confused. I am looking at the literature that shows how to setup...
This is puzzling me so hope you can help. We have injection molding machines in our plant. We have a power analyzer hooked up to one to monitor the power consumption and stuff. Looking at the load profile for about 2 hours on this machine, it draws anywhere from 2.5 kw to 20kw depending on how...
Does anyone know of a manufacturer that offers small inexpensive dataloggers for Kwh on single and three phase loads. We presently have an Amprobe DM-II datalogger which is nice ( however fairly expensive)but we want to purchase another unit to monitor kwh as well. We just need one that will log...
We have an old system in our plant that is the grounded B phase or the corner grounded delta. Whichever you want to call it. What we have is 4160V feeding 4 step down transformers that step it down to 230V Grounded B. When you open the secondary side of the 500kva transformers the center phase...
Just wondering if there are any negatives or positives to placing the overload contacts of a standard motor control circuit on the line side of the starter coil instead of the nuetral side. On schematics I have always seen the overload contact on the nuetral side of the coil on a 120 volt...
In our industrial plant we have about 70 small injection molding machines. We have been hooking energy monitors to these to see what kind energy we are comnsuming and how efficient they are. My question is on the readings we are getting. The machines mainly consist of electric heater bands and a...
My question relates to premium and high efficiency motors. First, if you compare say a 10 hp standard motor to a 10hp high efficiency motor how is electrical savings accomplished. Under ideal conditions should the 10 hp standard draw the same line current as the high efficiency one? please...
We have a unit substation in our manufacturing facility. The transformer section is a 5oo Kva 4.16Kv to 480/277v. It is connected to an 800 amp main breaker which feeds a large panelboard. The low votage amp rating of the transformer is 602 amps. the unit is about 5 years old and installed in a...
