Hello Chris,
I have spent the last couple of years converting the PM833-TV to CNC and have learned a lot along the way. You seem to be doing a nice job of selecting nice components. While reading your post there is one thing that comes to mind, the stock motor that comes with the mill is an odd duck. It runs at just under 7500 max rpm, is then geared down something like 2:35 to 1 to yield a max spindle sped of just about 2900 rpm. If you plan on machining aluminum with a cnc machine, this will become an immediate stumbling block. The motor will be screaming your ears off at 7400+ rpm while your spindle is running under 3000.
My suggestion is to dump the stock motor and replace with a 1.8KW or 2.6KW ac servo motor. Save the couple hundred on a new VFD and put it to the spindle servo motor, new bearings and drive pulleys. If my memory is correct, the whole deal is about $550. This will give you a conservative 5000 rpm spindle and enough torque to tap a 1/2-13 hole. It will also reduce your head weight by about 10 kg. In my humble opinion… This single improvement will make the biggest impact of any other improvement you ever do to this mill!
Best of luck… Richard
Here are a few links that discuss this further. I would be happy to share anything I have learned:
Spindle Bearing Replacement - CNC Mill Conversions and Builds - Dr. D-Flo (drdflo.com)
Another PM-833TV Conversion - CNC Mill Conversions and Builds - Dr. D-Flo (drdflo.com)