Time for a new Warpinverter build

Author	Message
rogerdw Guru Joined: 22/10/2019 Location: Australia Posts: 955	Posted: 11:05am 28 Feb 2021         Murphy's friend said   Looking good and a wise choice to start with the small one - i started with the big one . Thank you  ...  I'm not always good at listening to advice, but glad I did in this case. Already the difference between my first transformer (#4) and the second one (#3) has been an improvement.   Quote   You might consider sitting the core onto something smooth like you table surface when you wind it as it will slide much easier around. I wound the big double core on a curved support (so I could look into its *horizontal* hole). I found that way safer after it nearly slid off the table while winding it like in your pic. Its *very* heavy even when empty and you won't be able to catch it should it slide off the table. The smaller, narrower, cores are fine to wind as you show Yeah, I'm not sure why I chose this way  ...  but it seems to work ok for me  ....  but I'll certainly consider changing for the larger transformers. The black foam is relatively soft, so they don't slide too well  ...  which suits me fine so far. I have fitted an ocky strap through the core to help prevent it sliding off the front if I get too physical.     Quote   When sticking on the paper radial marks to align the wire you only need that on the top as you can't see the bottom of the core anyway. Perhaps spaced lines around the outside of the core help to keep the wire straight. Yeah I did exactly that  ...  just one on the top and one around the outside to help keep them vertical.   Quote   The roller on your 'pushing' tool might be a nuisance, I would have cut just a groove at the tip to exert maximum leverage. Have fun, I hope you have strong hands - you certainly will have them after this job The roller tool really needs two hands to control it to work the best as it can roll too freely  ...  which is a bit tricky when you also need a third hand to keep the wire tight. I've taken up wrapping my thumbs with masking tape before I put on my gloves  ...  but it's my middle finger that's suffering at present. I'll have to change fingers for the next layer.   I know you said you were able to sit down to wind yours, but I've had to stand to do the job here  ...  and particularly for the first one  ...  I ended up with jelly legs from squatting down to get the wire underneath properly  ...  then standing up to complete the turn. The first few days were a bit painful  ...  but my legs seem used to it now. I'm actually enjoying the winding  ...  in a perverse sort of way.     Looks like my images still won't show. Dunno what's up there.