Ready Steady Eddy

[EddyCurrent]

It's done !

This is before showing the moat in place. Clive S recommended 10mm epoxy each side of the linear rail so with my rail being about 20mm wide the epoxy bed has to be 40mm wide. Because my support beam is 50x50x3 box section it only left 5mm spare each side which meant the draught excluded would have been on the radius of the box section, that's why I clamped strips of wood each side so as to fully support the draught excluder. You can see I've coated the joints and any gaps with sealer.



The gear used and the environmental conditions at the start. I used an old ice cream tub and a sawn off milk carton, the epoxy was mixed in the milk carton then poured into the ice cream tub with a thin stream as suggested previously. I'm not sure this did much but at least there was no mess created. The ice cream tub had a 7mm hole on one side, right at the bottom, with a piece of tape across and this proved to be perfect for pouring. Humidity is quite low because I always have a dehumidifier in there.
The calculated volume of my moat to give 5mm depth of epoxy was about 605300 mm^3 and it worked out that 500g of epoxy plus 250g of hardener was just right.



This is after the pour, you can see the meniscus. There were no leaks and there was never any risk of it overflowing the moat. The epoxyducts were about 10mm wide and I'm thinking they could have been wider, definitely no smaller, the reason being that with this viscosity it needs a decent channel to flow down otherwise I would not be confident that the whole surfaces were at the same level.

[Clive S]

Eddy That looks nice re the moat I did find that my moat could have been a little wider although I did have two of them. I am sorry that I forgot to mention that before but you have plenty of width now in the centre even you don't get rid of the meniscus. ..Clive