- Thread starter Chris F
- Start date
Nah not yet. Haven't gotten round to trying a totally different starter yet.. hoping to do so shortly. Got a photo of your 152ADS?
Cheers!
skotl
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Ah shame - just sold it
Pics of it here, if they are of any help: Olde worlde electrical switches | MIG Welding Forum (mig-welding.co.uk)
I signed up just to say thanks to @Chris F for posting & extra thanks to @Dcal for the replies!
...
I have a similar switch for an old lathe that was made for 3 phase power, but my household power and my new (old Metropolitan Vickers) motor are single phase.
Using the knowledge you provided here, I cut up a rusty old microwave fan for the plastic & wire... I re-created a new spindle; got it fitting snugly, and then painstakingly un-wound the fan's coil (made for 240V, 50Hz) - to re-wind onto my new spindle... it took HOURS.
But... plugged it in & presto! the magnetic switch now operates at 240V.
.. so you CAN solve this problem with some old rubbish & some glue & a bunch of time! :
THANKS AGAIN!
(the motor is disconnected in the below image - but everything is now restored & the switch works on 240v!).
Side note: I had also read about removing 40% coils from the 380V coil to achieve the same thing... but I wanted to retain the original coil, incase this switch ever goes back to a 3 phase job.
Side note 2: I have tested this running for a longer time & it is getting pretty hot! ... I worry my dodgy windings may burn out--> but I know I can do a better job next time if needed.
Agroshield
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If you still have the 415v coil, can you measure its resistance and see how much current it would draw (and thus calculate its power consumption)?
Do the same calculation for your new coil and compare answers. At the least, it would tell you how many turns to add for the mark II version.
I am a bit hazy on ac stuff, but could you put a resistor in series with the hot coil to cool things down?
My original coil is ~640 Ohms... I tried to work out the power consumption & match it for for 240v - but I have only just learned this stuff to do this job so I didn't trust my own maths!
... my new coil is ~285 Ohms & I have no idea how many turns. In the end, I just decided to rewind the coil off a microwave fan- which is already made for 240v.
... my new coil is ~285 Ohms & I have no idea how many turns. In the end, I just decided to rewind the coil off a microwave fan- which is already made for 240v.
