The CNC Z axis travel on a round column is limited to the quill travel, max normally 4 to 5". Which in any case is very often sloppy. Manually using the column to raise/lower the head half way through a part loses the x and y co-ordinates, and in any case kinda defeats the object of CNC. However it depends on what you will use it for, some classes of work does not necessarily need a lot of z-axis travel.
[QUOTE=szcharle]I found a round column mill some user tell me it's good, and it have a Six Speed
Gear Head, motor is small, 200W, the head (main axis) can rotate with certain angle.
so i think this is fit me to convert to CNC,(due to i want use cnc mill to cut stainless steel,need a bit strong)
but this mill is round column type, so can i use this mill convert to CNC? and what is the weakness for this type Mill? why? Thank you!
btw: I am at China ,this price only CNY 3700,about USD 460, or EU 370.