The only limitation I see in the G-540 system is the power limits and therefore the motor size. that being 50 volts and the 3.5 amps per motor. .

But this was designed and built for the hobby market ant the mini lathes and mills of the world. And a 100 watts per axis will move a 40 lb objects at an impressive max feed rate.

Like I said you need to decide what performance you need or want and calculate the weight of the mill table and estimated heaviest object you are likely to machine on it . Then go to the gecko site find the formulas and plug and chug.

THE WEIGHT OF THE HEAVIEST OBJECT BEING MOVED: This will typically be your gantry and, for this example, we will use a gantry with the weight of 40 pounds.

INCHES PER MINUTE DESIRED: This is a number that will make you deliriously happy with the performance of your machine and, for this example we will use 1000 IPM.

Now multiply IPM and pounds together and divide that number by the normalizing constant of 531. The answer will be the total number of watts needed for your machine. Below is the formula in basic form:

(Heaviest object * IPM) / 531 = Watts required

And solved for the numbers above:

(40 * 1000) / 531 = 75.329W

Soo a 120 * 333 /531= 75.25 watts.

So you should be able to move a 120 lb (estimated ) mill table at somthing like 5.5 inches per second. And a max table travel of 18 7/8 inches . so at that rate you can move the table in a little over 3 seconds.

http://www.geckodrive.com/support/choosing-a-drive.html
But please look at ALL the information and measure the torque you need.

As much as I like my g- 540 I have it is on a mini mill . You need to be happy with the results of your choices. And I have no affiliation with gecko. Buying from them puts no cash in my pocket. I am just trying to encourage you and others to consider american made first.The last thing I want is for you to spend hard earned money and be disappointed with the results.

Tin