Wobblycogs CNC Mk2

[JAZZCNC]

Ok it's getting there now.!! . . . Few more things I'll comment on.

I can see what you trying to achieve with Z axis but doing this your compromising it's strength where it will probably spend most of it's time cutting and that is Extended further out. Because the bearings are high up the extension distance is long when cutting thinner material and I'd estimate you'll rarely cut thicker than 50mm material.
Much better way would be to put bearings lower down but not flush with bottom, leave clearance for bolt access to Y axis bearing plate. Then make the spindle mount adjustable on front plate if you ever need to cut tall material.
Looks like your planning on using WC spindle so that alone can slide in the mount easy enough so you'll find a intermediate location for spindle mount that will allow you to adjust for all materials.


Next the material thickness of the Front and Rear Z plates are not thick enough and they could resonate and flex. Wouldn't go less than 20mm here.
The plate on the rear of moving Y axis carriage isn't needed or adding much strength so drop that It's only adding weight and cost. Good way to help gain strength in this area is to make a cover for the Z axis from folded 3mm ali plate and bolt into sides of Z rear plate and Y axis top bearing plate. This way it braces this area and protects the Z axis ballscrew belts etc see pic of cad 3d model and unfolded sheet, Next week I'll show real thing cause I've got to make one.


Also Got a way for you to increase cutting area and increase Y axis strength but will be hard to explain so may end up drawing it to best show.? I'll try explaining first.!

Drop the profile spacers on bearing plates this will allow you to use longer rails that extend right up to gantry sides. This will allow the Y axis bearings to travel over the X axis bearings. Now because you can still have the same Y axis bearing spacing(or more) you can drop the width of Z axis front plate and therefore gain some cutting width with no loss strength.
You'll need to brace the X axis bearing/gantry plate area but that's easy enough done with triangle plates.!

Hope this makes sense.??