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Advice please on core drilling a slab


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On 02/08/2024 at 11:49, SteamyTea said:

I posted a response, asking you to video it.

No camera holding assistance is forthcoming as I head off to do the fifth and final hole. The task requires 2 hands and 2 feet.

But here is a pic of the setup. The transformer position is for temp stability.20240801_113924.thumb.jpg.876fcb84c10880ef9d05eaba68258335.jpg

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Here is a core, 6" as designed, and the others are thicker. There is often about 5mm of paste on the surface from overworking, but this is concrete all the way. A sandier mix than I expected but it is gritty and strong.  20240801_152628.thumb.jpg.ae4aff6528d9c4efbeb447b98e920eea.jpg

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1 hour ago, saveasteading said:

If the machine is idle or disconnected, is the transformer still drawing current?

There will be some very minor inductance, and possibly capacitance, losses, nothing major.

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