WOW!! 2-3hp on an SX3?
I am not trying to neahsay here but I doubt you will ever see enough mass and rigidity to utilize that HP on the SX3.(I bet you will be surprised by the stock BLDC capabilities, minus no mach control. Its a strong motor)
I have a 1HP baldor motor and VFD set-up, on my SX3 and It seems to be the perfect fit. I am matching it with this sensorless vector drive from factory mation 7300CV Series Compact Vector AC Drive 1/2 to 10HP
And as far as electronics packages go, I personally would go with the G540 from geckodrives, matched with 2 nema 23 381oz and 1 906oz nema 34motors from keling, and a 48v power supply.
The 906oz motor detunes to 520oz with the 3.5 amp limit on the G540 but with pulley reduction it bumps back up to 640oz-670oz, and with the gas strut I reach 150ipm rapids reliably.
Have you seen Page 30
If you ordered the CNCFUSION deluxe kit make sure it comes with the "CR" option. Although I believe now all you have to do is tell Michael you are using a G540 and it will be shipped with the proper pulleys for the Z.
Here is a link to my ongoing build, keep telling myself I need to update but been really busy latelyhttp://www.cnczone.com/forums/bencht...eady_go-5.html
Anyway, what are you going to use the machine for? What materials are you going to cut?
Also, when did the SS get backlash comp? Is it an update for existing users or will they have to buy new for the new features