Recent content by oldchadders

I had a science teacher many years ago who had a great gift of using "things that happen" to teach a lesson. One day he appeared with his lower right arm heavily bandaged. He explained that he had been helping his wife doing the washing up and dropped a carving knife, which he then tried to...

Hi John, I believe there are many of us in similar situations, nevertheless I extend to you my best wishes for a smooth passage through the rest of your time. In 2002 at the age of 55 I suffered a stroke, after which I was told I would never walk again. The irony is that some 20 years previous...

I well remember, in my secondary school days (some 60-odd years ago) our science teacher turning up one day with his wrist heavily bandaged. The story was that he had been helping his wife by washing up ster an evening meal. He was putting a carving knife in the cutlery drainer when it fell out...

I am in the UK, near Buckingham. My thought was the 180v motor would match the output of your controller.

Thinking about it, I probably have a speed controller too.

I've got a 180v treadmill motor which I no longer need which you can have if you want it.

The original probably used full wave rectification, with a pair of thyristors, rather than half wave with one (full wave will give a smoother operation of the motor - in practical terms you would probably not notice the difference. Reversing can be obtained simply by swapping the connections to...

Slower and less power by the ratio of 180/220 !80v is roughly the dc output from half wave rectified 240v ac (ie it is only using half of the ac input ctcle, whereas you woyld get app 220v dc if it was full wave rectified (ie the controller is only using one thyristor rather than 2, the latter...

These motors (AFAIK) are simple dc motors. I bought one (180v dc) intending to use it on a small lathe. From what you say (and most likely in this day and age) the control is digital - analogue is much simpler and easier to fiddle around with - dc volts is dc volts - with digital, trying to...

That will only work if the file is not secured in any way and if the original document was a text file, not an image file

If you have still not sorted this, if you email the file to me, I will sort it for you. [email protected]

First thing is to ascertain if the pdf page in questionwas an image file or a text file before it was converted to pdf format. If the former then things get more complex. You will need to export the text as a text file (if you export it as an image you can use an optical character recognition...

As a retired electrical engineer, my first thought was how easy it seems for metal chips to get into the motor when turning. I am just creating something similar-looking myself, I am using a low-voltage motor from an electric scooter, which has all of the openings cover with a fine mesh.

I am looking at doing something similar, using my existing pillar drill (a cheap Chinese beast which has served me well for many years) and I bought one of these...