Quote Originally Posted by Cynic-al View Post
Out of interest do people consider a 2.2kw spindle enough?

I already have a spare inverter that will run that and an er20 collet set so there would be a cost saving there.

If its not up to it I will plan for a 4kw now and buy a new inverter. I dont want to waste money on the 2.2kw spindle if its going to be limiting.
It Depends on the size of cutters you want to use and how aggressive you want to cut.? they can be pushed more than people realize and are very reliable considering the low cost.
Also, remember everything needs to scale accordingly so if you're using a larger spindle it will be heavy and your z-axis, motors, and gantry, etc will need to match.

John said it before and he's perfectly correct the machine is only as good as the sum of its parts or its leakest link so the Z-axis and spindle are IMO THE most important area, get this wrong, and doesn't matter how good the rest of the machine the quality of parts that come off it will always be shit.!