Comments sought on new build: A CNC Router for RC Gliders and Planes

[Jonathan]

Looks like that's for a RM1605 ballnut, but your mounting holes for the nut don't match? The RM1605 holes are on 45 degree spacing and they're 5.5mm diameter holes so you'll struggle to get M6 through them!

[JAZZCNC]

Looks like that's for a RM1605 ballnut, but your mounting holes for the nut don't match? The RM1605 holes are on 45 degree spacing and they're 5.5mm diameter holes so you'll struggle to get M6 through them!

And this is why I always insist the measurements on the drawings are taken from actual parts rather than Spec sheets taken from the Net.!!
So easy to assume they will be like the drawings only for something completely different to turn up.!! . . . .Thou in this case I reckon it's an Err has most ballnuts of this size use 45 Deg spacing & M5 bolts.?

[njhussey]

Was wondering what to do with the left over steel I've got so had a play at lunchtime with Sketchup...

[GEOFFREY]

Looks good Niel (I love fixed gantry). I think you could move the gantry back further if you wanted slightly more travel, and am not even sure you would need the back diagonals. Do it !!! G.

[njhussey]

Hi G, there's only one slight problem if I built this...where the heck would I put it, going to be tight on space in my little shed as it is!! The design as it is allows maximum travel of the bed so I can cut the whole area (500 x 400) I've got the raised sides (sealed with gaskets/sealant) so I can flood the bed with water when cutting the CF so the dust doesn't go everywhere. TBH I doubt I'd need any of the diagonals for cutting CF and Trafolite but I've got the steel so better safe than sorry!! This could use up all the left over bits I've got from when I bought the rubbish TB6560 control board and steppers, might even be able to use it for engraving labels for work. Spec for this one is very much as per my first post on here with the exception of SBR12 rails and blocks.

[njhussey]

Well I finally managed to get back onto the shop floor this lunchtime and re-cut the 40° angles to 45°on the supports.....tomorrow I'm going to try to do some more tacking up...depends on if I can get anywhere to weld as the shop floor is a bit busy at the moment. Really want to crack on with this now so I can hopefully have it running before Xmas.

[njhussey]

PROGRESS.....today I managed to tack up the last of the angle supports and start some of the welding up of the frame. Can tell I've not welded for a couple of years!!!!!



Oh yes, judicial use of the angle grinder I think will be needed...

[njhussey]

Nothing managed today as the area I was using has been set up for SS so I can't go welding and grinding there!! Spent a little time getting the fixed end blocks onto the ballscrews as the screws were a little oversized so couldn't get the bearings on the screw. Have managed to get one on but there's some play in the bearings which will need looking at...disappointing.