1200 x 800 Gantry Router Build

[reotilemarine]

I have managed to put together a first draught of the machine base. It is quite a steep learning curve with fusion 360. I have put in a grid of tapped holes at 50mm centres. This may be changed to 75mm in time as its a lot of holes. I will have a sacraficial top over this with clearance holes into the threads below.

Before I model the gantry I have looked through here for some parts I am unsure of but still undecide on -

• Optimum distance between the two carriages on the linear rail to give adiquate support without loosing too much Y travel.

• This may also have a bearing on the first query, suggested height of gantry. I would like to have a minimum 100mm of useable Z travel above my sacraficial bed if possible. Machine bed is 15mm and sacrifial bed will be similar. I understand different Z axis designs can give more travel but there is a trade off for a springy Z axis at shallower depths.