Page 2 - Kb Electronics News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Over the past few evenings I've been working on a new drive and motor for my Cowells lathe, I chose to go with a KBIC controller and a DC motor since they are readily available in small sizes. I was nearing completion and decided to check everything was wired up and running correctly before installation, which it was. But then with just a small repositioning of the mains cable (which seemed to want throw itself of my bench) the whole lot went BANG! Many many swear words later... Inspection found I forgot to connect the earth wire to anything and the ringed connector at the end had touched on...

Needing to replace a motor speed controller seems to be 'not uncommon'. The motor on my Sealey SM2502 stopped working after I tried using a 65mm slitting saw. The motor is OK because it works with 12V DC (Slowly but with plenty of torque. I examined the control board and it has no signs of frying any components. I poked around with my Scope and, apart from the rectification of the input mains supply, it was too hard to trace any fault - apart from no output. I'm tempted to try a twenty quid controller from eBay, which is ok of a 300W DC brush motor at 230V. I could try replacing the major act...