RC Aircraft Hobbyist

[Clive S]

I will make the frame from aluminium extrusion of say 30mmx60mm long sides y-axis and 30mmx30mm X-axis. I'm thinking of using two 23nema Steppers on the y-axis unless this is overkill for the length. A 23nema on the X-axis and a 17nema on the Z-axis

45x90 is a better size as the slots fit nicely with the BK and BF bearing etc. (assuming you are going with ball screws)

nema 17 are not good enough for the Z with a 2.2kw spindle.

1, Do CNC routers use similar electronics to a 3D Printer?
2, Do the need microswitches for end stops?
3, I see a lot of electronics in boxes with fans?? Do they produce that much heat?

1. Yes but need more power suggest, using drives AM882 run at 68v
2. its always a good idea to use limits and homing switches sensor type are cheap.
3. It is usual to put a fan in the box to get the heat away

It will be difficult to build on the budget you have stated I would estimate about £1500 to get a decent machine built by yourself.
I take you have read through some of the build logs on here. Also its never a good idea to buy kits of electronics as they are never matched.

You would be doing yourself a favour if you could draw the machine out in cad first.