Hi all, I've started planning a big build that will be 5-axis + a turntable.

I looked into buying a used robot but the cost of repairs and software put me off. Anyway, where's the fun in buying something!?

The machine will be used for milling soft materials like polystyrene/polyurethane etc, if it turns out rigid enough for wood then that'll be a bonus.

Attachment 496058

Attachment 496054

Attachment 496056

As you can see she's going to be a big old girl!

I'm in the middle of modelling the 2-axis spindle head too.

The frame will be 100x100x5mm steel box section, the Y axis (normally Z on a 3 axis) will be 100x100x6mm Aluminium box section.


My questions are;

1. What would be best for Z axis motion, ball screws, chains, R+P?
2. Would properly sized steppers lift the Z, or are we in AC servo territory?

Any input appreciated.

Edit to add- Obviously I've made no effort in this model to make this actually buildable, I'll work out the details later.