I have some on the mill, I spoke with keling who told me those were the strongest I could run on the gecko.  Do you have a suggestion?

Hood, I can only find these "OPB 9016B" numbers, do you have a link to buy?

OPB916BZ
OPB916IZ
OPB916BOCZ
OPB916IOCZ

I have some on the mill

Then you are meaning that you already have the steppers.
Think the drives are good to 3.5 amps and with that thought in mind i was going to say have a look at
Kelling KL23H2100-30-4BM  500 in oz 3A

RICH

yep he said they were good to 3.5 amp.  

When I asked him what was the most powerful he had for the gecko he told me to get this one       NEMA23 570 oz/in 3.5A 1/4” Dual Shaft Stepper Motor (KL23H2100-35-4BM)  

so 570 oz in

the ones I have on the mill are the just under 400 oz in, the x feed is direct drive and can skip.  The y did too until I put 2:1 pulleys on it.

That is why I was really looking for more power on the lathe.

It is the OPB916B I used, I seem to remember someone saying they stopped producing the 916B and replaced it with the BZ but can be 100% sure.
Hood

Some of the listed  motors have a motor curve and one should look at them and compare how they are rated.
My take on it all is that you want power delivered to the axis which is speed x torque along with a satisfactory axis velocity and acceleration.  So this all gets complex quickly and one needs to evaluate.
So looking at the motor curves at some set of defined conditions provides a comparison. For a few bucks you may be able
to dramaticaly change operating conditions ie; say 500  vrs  380 in oz and you get an additional 32% bump in torque with the motor
rpm not far from each other and that allows increased overall capability of the lathe ( 5hp spindle motor with more capable axis).

So you asked and he said here is the largest in oz motor in that frame size. But application of that motor may not be better.

I can't write a book here but just want to shed some light on the matter. If your confused, that's alright....not my intent....
lets just  say awareness has been provided.

RICH    

Thanks all. 

Still trying to get up with a sensor.  Tried ordering but on two different sites it was out of stock or discontinued.   There are a ton of sensors on ebay.  May have to muddle through them

Hi.
After 2 weeks of working on it, I got the C3 + G540 + Mach3 Working.
If you need help?
Sincerely,
phillip~