My CNC router assembly is progressing. I don't have all the hardware yet - just making purchases as funds permit. Enjoying the process too
I will be cutting model helicopter sideframes out of two types of material - 1.6mm thick aluminium and up to 2.0mm thick fibreglass sheet (G10 material). The sideframes include slotted holes that are 2.0mm in "diameter". There is lots of 3.0mm holes, 3.2mm internal radii as well as pocketing. Each sideframe will will fit on an A3 size piece of material, so my machine is at the smaller end of the scale. I won't be making huge quantities of frames, and production speed is not a consideration for me.
My budget is not huge, so a Chinese spindle and VFD is probably the way to go.
Question #1:
Am I right in thinking I need to identify the correct type of end mill first before I can pick an appropriate spindle?
Not sure if I need HSS or carbide tool or what no. of flutes would be required.
I presume a particular end mill will have a sweet spot i.e. cutting speed RPM and feed rate mm/min. So, Question #2:
For a given end mill, is there a "correct" ratio of RPM to mm/min that will result in efficient cutting of my chosen materials?
Question #3:
For my application, is there a benefit in choosing a water cooled spindle over an air cooled version?
Question #4:
Would a 0.8kW spindle suit my purpose?
Good advice appreciated.