Just having a look at some of the posts and decided to once again add something different. This post is a contribution from Ron Columbine and I decided to post it exactly as Ron wrote it. Thanks for the contribution Ron, I agree with you, Safety is Essential in our trade. Ron’s document: As maintenance …
Just a very quick post on thermal overloads and the dangers lurking within some of the functionalities available. You would no doubt have seen that there is a manual or auto selection available on the front of the overload unit. When set to manual, it means you have to reset the overload by pressing the …
I thought we could spend a bit of time looking at something you would come across quite regularly. Actually, you are bound to find this on almost every machine. I am talking about a remote stop/start station. Now consider the circuit. On the control board you have a stop and start, and somewhere near the …
Just another very short post, sorry The manual I am working on is nearing completion and this is probably a good opportunity to let you know about it. Basically the concept is to create a reference manual that you could use in different environments with information on fault finding etc. At this stage I am …
Just been looking at some circuits and something that we need to look at keeps coming back. The fact that you open a control cabinet when having to find a fault only to realise that there are no schematics available, is something that just wastes so much time. When you look at how the circuit …
Now for the fun part, checking to see if your circuit will work! First, let’s take a look at the first attempt. As usual, to open the drawing, you will need to click on it to be able to see it properly. Now do a “walk through” of the circuit as drawn. First thing …
This section will touch very briefly on the topic of circuit design. The idea is to give you a starting point from which you can further improve your skills As with any machine, the control of it needs to be defined before you can start designing a circuit. This is once again where we …
As a follow on from the post on Basic Electrical Circuits, here is another circuit you may be able to find a good use for. Consider an application where you need to start a machine where you have no full line of sight of the machine. This may be a very long conveyor and you …
I thought it would be useful to have a look at another application of an interlocking. This particular application is one that you would most likely have come across without paying too much attention to it. So, what is it? Enter the Star/Delta Starter. The circuit is not that complicated at all. In fact, I …
Just finished something I was working on and decided to look at a circuit you could have a use for. I will call it the Auto Flush on Pump and here is why: You have a submersible pump and the sump does get some solids into it which, at times, blocks the intake on the …