1220 × 2440 build

[HullMark]

Hi thanks for replying.

1. Hopefully the gantry won't be an issue as the design uses 50mm by 100mm mild steel side rails for the x axis, with 50mm support structures welded to the bottom. I'd seen somewhere that dropping the bed instead of raising the gantry makes the structure stronger, makes sense. 10mm aluminium plate for the gantry in an L shape. In theory, this is sound I think?

2. Backlash, which sounds similar to slop in a drivetrain, was one of my worries here too. In my design I was looking at using ballscrews, I guess I need to keep reading some more on that issue. Are you saying that backlash can be eliminated by using those methods? I'm sure I've read somewhere it can. The structure itself I think should be ok, I tried uploading a picture from my phone a few tims but it failed.

3) Most of the weight would be in the bed and support structure below made from mild steel, the only moving parts would be made from 10mm aluminium plate to keep the weight down.

4.Again this is an area I need to look into more, but I'm thinking I need to finalise my design and see how much it's going to weigh before I decide.

4. Hopefully this won't be an issue and is why I'm not even going to attempt to weld this myself. The lower supporting structure will be separate from the bed, bolting together so I can use shims to get the bed as level as possible. Not 100% decided on whether the resin route will be needed, probably, Hopefully someone else will come and clear this up.

You mean that rather than having 100mm travel they leave it at just having 2 axis and using different router bits? I could make that work for some things, but not others.

Many thanks

Ps sorry if I've posted this multiple times!