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This was done on industrial trace cutting machines that followed a printed pattern shape. in order for a attached cutting torch to cut out the shape.
A light beam was used to oscillate/vibrate across and follow a line by recieving the reflected signal back and stay on track on the line.
Both can be removed for most applications.
Basically they limit the secondary current's capability.
Often the use for these TFMR;s is SMAW welding, where they should definitely be removed.
The downside is any welds partially defeat the heating effect reduced by using laminations, intending to overcome this.
I have never personally experienced any negative effects after reassembling any TFMR I have made a mod to.!?
Another method I have used after grinding off the weld in order to remove the laminations when adding or modifying the core windings, is to dip or coat it in winding shellac afterwards, as is done with motor stators, etc.
BTW, if reusing a M-Wave transformer, remember to punch out the magnetic...
That jogs a memory, I remember working at Oxford Observatory, used 100v? DC , we converted it to AC in order to hook up to the grid!
Back then I was an Electrician, moved on since then!
When I practiced in the UK from the 1950's it was 230v and gradually introduced 240v as standard.
I have been away from it for some decades.
(I/we used imperial wire size at that time e.g. 3/.029 etc)
Generaly start switches are used/needed on motors above 1 HP and usually have a start cap, as well as the run cap.
Often these smaller fan motors just have a continuos fed , phase shifted start winding.
But 1ph induction motors do not control well using speed control methods.
This is why those...
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