3 Axis CNC router

**JoeHarris** · 01-05-2016

Btw I have decided on 1no 30mm wide bridge and the channels for the rails will be 40mm wide (for 20mm rails) I hope this will be wide enough to avoid meniscus problems - I'm trying to get the most out of my tin of west system!

**njhussey** · 01-05-2016

Watch for shrinkage at the ends of the rails, mine were slightly lower at the home ends...dunno why! Also double and triple check the seal between the MDF moat and your rails, leaks are a bugger to stop! If possible line the MDF with packing tape as it'll make getting them off so much easier...much less work with a file :)

**JoeHarris** · 01-05-2016

Thanks for the tips!

**Clive S** · 02-05-2016

Joe I did not have any shrink problems at the ends on mine but do put the effort in to stop any leaks you will be surprised how easy it is to get one, a small bead of silicone is the key

**Neale** · 02-05-2016

I sealed my moats by running a small amount of epoxy along the gap first. Small amount and it doesn't run through but will cure in the gap and stop it leaking when the full depth goes in a day or two later.

**JoeHarris** · 04-05-2016

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Surface ground and scored with sandpaper. Dams almost complete...

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**njhussey** · 04-05-2016

Looking good Joe....looking forward to seeing the pour!

**JoeHarris** · 06-05-2016

Originally Posted by njhussey

Looking good Joe....looking forward to seeing the pour!

Me too. Bought some silicone sealant and found an oil radiator donor! Nearly ready...

**njhussey** · 06-05-2016

Originally Posted by JoeHarris

Me too. Bought some silicone sealant and found an oil radiator donor! Nearly ready...

What's the oil radiator donating?

**JoeHarris** · 06-05-2016

To heat my workshop... Someone is lending me a couple of them. A minimum of 16 deg C as a constant temp is recommended and West System state: "As the temperature drops, epoxy becomes proportionally thicker, reducing its ability to flow out." They also state that air bubbles are more of an issue at lower temperatures.