Thread: Hsc cnc

CNCfusion sell a kit for this model

CNC Fusion

He's using Nema 23 motors (with ballscrews), if I was to take a guess I'd think around 200 oz-in, cross slide looking to be a smaller motor.

You could shoot him an email and explain that its for a school project and he should send you the specs of what size was used, at-least you'll know its a tried and tested setup then.

A nema 17 would definitely not be enough for a lathe even of that size as the forces exerted onto the cutter cross slide would cause chatter. I would personally use a high end nema23 with a 2 or 3:1 pulley ratio which should also allow the motors to be tucked away rather than just poking out increasing the footprint. One major thing i would do though is make sure the steppers are sealed options or are covered well as most lathe users will use coolant or at least should, and the bearing failure rate in the cheaper motors is quite high from what i read. Anyway a couple of ideas for you to think about but another good place to read over is the practical machinist forums as there are a couple of retrofits there and with some reading should show you some pros and cons of the different design components for a good baseline.

As Chris pointed to, there are already kits available for this type of thing, although for the HSC i don't recommend copying designs, they DO check online. Your definitely getting a good start on the work at least, considering it won't be due till next year....lol. Good Luck!

Thanks for that,I plan on using ballscrews for the x axis and use the origninal screw in the cross slide.

If you can try to incorporate a cross slide ballscrew, although it ould be hard due to the size of ballscrew nuts and the compact cross slides. The forces involved in lathes will cause chatter in anything with slope and from what i've read on the chinese machines, these leadscrews wear quickly and show chatter due to the backlash. I've always wanted a lathe to convert but my space and budget doesn't allow a large quality machine to do so and my research put me off the chinese route so i will be designing and building my own small slantbed lathe once i finish the numerous other projects on the list.

Daniel

I will add ball-screws to the cross slide after the HSC I don't want to bother designing and documenting it, so I will stick to the original screw till it wears out.
I see your also in Nowra

It's very difficult to get a ballscrew for the 7x cross slide. People have fit 8mm screws, but these are rare