Threading with A B phase only?

OK so I have ordered the Mesa 7i76E for my EmcoMat-20E and it should arrive in the UK in a couple of weeks. Andy which specific models of Wantai steppers and drives did you go for ? Wantai do have an ebay shop and ship from Germany so hopefully import duty will be free for me. Thanks, Adam

They were Nema34 1090oz in 5.6A. As long as you get a Nema34 size motor it will bolt right up to the old Z bracket but you will probably have to bore out the center of your bracket a little. The max speed I can get on my machine is 30 inch a minute with these
motors and the old lead screws. If you want better performance you might think about retrofitting a ballscrew. I wanted to convert to ballscrews but didn't want to spend the money at the time. I'm fixing up a little EMCO pc lathe right now and my hope is to use the money from that to finish converting the lathe and my bridgeport.

Thanks for that - I thought for mills and lathes generally people go for more powerful NEMA 42's, and Wantai do describe the NEMA 34 1090 oz/in model as only an "engraver" motor, but I understand your choice of a Nema 34 size as a perfect fit (and cheaper than a 42). I think I would prefer to go for a more powerful one like the Wantai NEMA 34 1600 oz/in, or maybe the Stepperonline NEMA 34 1841 oz/in. Both of course more expensive and higher voltage, and still only about half the power of a 42. Or maybe fabricate a bracket with an idler pulley to squeeze a 42 in?

No eBay APP ID and/or Cert ID defined in Kunena configurationMy 9 x 30 lathe was fine with NEMA 23 steppers.
Steppers get slower as they get bigger.NEMA 42 tend to be very slow.

You might want to consider the new wave of closed-loop steppers. These are stepper motors (Cheap) driven as brushless motors.
A random example, not a recommendation of model or supplier.

Ah I didn't know that thanks. Did you get the Wantai 2H Microstep Drivers (DQ860MC) with your 1090oz/in, steppers? Those same drivers are offered as a package with their 1600 oz/in NEMA34's....

Andy thanks but I think I'd prefer to be a sheep and keep it simple and use ordinary stepper motors like others do, at least then it is easier to bleat for help! The Encomat 20E is 8" x 40" or in America terminology I think 16" x 40". Other Andy of Mtndrew77 was saying that the main leadscrew feed was a little slow with NEMA34 1090 oz/in and could be speeded up by upgrading with a more efficient ball screw, hence i am thinking simpler just to up the power - their NEMA34 1600 oz/in is not really much more expensive and comes with the same drivers.