I'm looking at purchasing a Super Mini Mill 2 (10K spindle) and an SL-10. From all the reading I've done it seems like the Phaseperfect phase converters are the way to go. My question is in regards to sizing. These machines are going in a home workshop. The Phaseperfect is supposed to be sized according to the actual horsepower of the machine. I've figured out from reading that the 15 HP rating of each of these machines is the max horsepower based on some short period of time. The nameplate rating on the motor is something less however Haas doesn't tell you what it is.
From reading Haas' preparation document it says that each of these machines has or needs a 40A machine breaker with a recommended service of 50A.
I called Phaseperfect. They seemed to think that I needed the PT-355 if I was only running each machine separately or the PT-380 if I wanted to be able to run them both at the same time. With the PT-355 they said I'd need a 125A breaker on the input side and for the PT-380 a 200A breaker. They were using the 1.73 factor to get the conversion on the single phase side. I think they were also concerned with any starting loads. My question is, do you think those recommendations are about right? Or is that overkill?
My house currently has the standard 200A service. In talking with an electrician no matter what I do I'm going to need to upgrade the service coming into the house to 400A from 200A at a cost of somewhere between $9K-$12K. I'm then looking at another $4700 (PT-355) or $6200 (PT-380) for the phase converter.
To throw another variable into the equation, I'm looking at a rotary screw compressor. The Chicago Pneumatic seems to be the most cost effective solution with a QRS 7.5 with dryer costing $5937 for the single phase model or $5244 for the 3 phase. So, do I go with the 3 phase and the larger phase converter? Can I get away with the smaller phase converter, run both Haas machines, and the compressor?
All of this is a bit confusing to be sure. The only reason I'd want to go with the QRS 7.5 as opposed to the 5 or 3 HP models is that the 7.5 is rated for 21CFM for airflow and I have a small blasting cabinet. That 21CFM rating is at the max pressure of 150 PSI. I think the blasting cabinet only uses about 20CFM at 90PSI. Won't I get a better CFM rating from the compressor at 90 PSI as opposed to max pressure (150PSI)? Note that I'd never plan on running the blasting cabinet at the same time as either of the Haas machines.
Wow, the price of this machine is really starting to add up when I figure in a new compressor, phase converter, and electrical service. And I haven't even gotten to tooling yet.