Design Help Pt2 Required for CNC design/Build

[MikeyC38]

Thanks everyone for the very kind and useful advice. Here are the revised plans with most of the stuff hopefully taken into account:

1. Revised Z axis with bearing blocks fixed to the Z plate against the gantry
2. Gantry sides beefed up to 200mm width to reduce racking . 20mm thickness
3. More detail added in drawings

The endplates will be extended to allow for a future upgrade to twin ballscrews as everyone is suggesting! and belt driven to avoid synchronisation issues as discussed earlier.

Thanks for the guidance on sources of aluminium plate.

For the eagle-eyed viewers you may notice that the y-axis bearings are floating... this is not deliberate but something I realised that a 750mm ballscrew is the total length, not the threadlength and as I want to bolt the BF/BK blocks to the gantry sides then I will have to reduce the length of the y-axis round rail and support. Question here - is it best to dismantle the supported round rail then cut the rail and support seperately and re-assemble? or try to cut it all in one go?

I'm really getting into the 3D solid CAD in a big way - it really does help you work out how things need to fit together and how on a 300mm ball screw, the maximum travel you can get on the Z axis using supported round rails would be no more than 150mm at best!

Thanks again everyone!