Thanks all for the advice.

---

Sean - Since I don't have a dial caliper I wanted to figure it out by the math. It turns out that I did the calculation right, but then just plugged in the wrong number (duh). Once I used the right number, it seemed as good as I could measure it without a dial caliper.

The math I used is:

Distance per revolution (circumference) = Pitch Diameter * PI
(the pitch diameter was specified on the web page at McMaster)

Distance per rev = 0.625 * PI

Distance per rev = 1.963 inches

With 200 steps/inch and using 1/16th microsteps - I have 3200 steps/rev

Steps/in = steps/rev / inches/rev
Steps/in = 3200 / 1.963
Steps/in = 1630.158

--

Ram - one gap in my understanding (of the may) is cutting speed. I had originally thought that would be based on the stepper speed, but then realized that would work right. I'm guessing that's something you set in Sheetcam?

--

Jester - thanks for the tip - I hadn't thought about that. The motors are pretty stiff when powered off, but I'm guessing that the floating head and the torch will add some significant weight.

--

I just finished "adjusting" the Y axis carriage. With a couple blocks of wood and a crowbar, I was able to get it square. It now runs perfectly on the tube.

Just a couple more wires and I should have all axis running.