Originally Posted by
Rockn-Roll
My criteria for a CNC machine tool is that it have a spindle motor rated at least 2HP on single phase 220Volt and 3-axis precision of at least .001" for around $10,000 that can cut a 5"x5"x5" cube of steel.
mactech54 generously provided me with a suggestion to look at How-Mau...and after some assistance at finding a modern web site for them I am happy to say that their HM-145X does "appear" to meet those requirements. Spindle motor power is rated at 1.5KW using 220Volt Single phase (or apparently even 110Volt) which is equivalent to 2HP and the rated precision is exactly .001". The table is 24.65"x8.11" with table travel (x,y,z)=(11.81",7.87", 11.81") which will accomodate my theoretical 5"x5"x5" cube. And, the control system is Mach 3 which I have learned is a modern PC based control system. The price tag is $7650. They also have a model HM-241X with a 2.2KW motor (3 HP).
Edit: I just noticed that in the Electrical section of the HM-145X it indicates a power consumption of 750W...even the HM-241X only requires 1500W. Electric motors are not very efficient...if the spindle motor really is producing 1.5KW of cutting power, then the power requirement would be more like 3KW...nearly double, but the specs from How-Mau are indicating a power requirement of 1/2 the spindle power output. I only minored in physics, but I believe if a machine is only drawing 750W from a power source then the theoretical maximum it can produce is 750W. Perhaps it's a mistake or I'm not reading it right.
Thanks for the suggestions...keep them coming...I'd like to see if there is another one available that meets my requirements. The Tormach's don't, but thanks for the opportunity to take a look at them. The Okuma's are production machines with at least 10HP and have 3-phase power requirements which are more than what I'm looking for, but again...thanks for mentioning them.