Do I have to use your stepper motor mount and coupling?
Yes, you will have to use our stepper motor mount assembly. Because we have the ends of our ball leadscrew machined to fit the tapered end of our coupling, the end of the ball screw will not fit any other style of coupling. We also preload the bearings in the factory, so we are sure that they are done right and that the amount of backlash is at a minimum.
Can I use the Y-axis accordion covers from my original machine?
No, they will not work with the new mill saddle and ball leadscrews.
Can I use my own stepper motors?
Yes, if the stepper motors have a NEMA 23 frame, then they will fit on our stepper motor mount. Our coupling has a 1/4″ hole for the stepper motor shaft. If your shaft size is different, we can probably accommodate you with a custom coupling.
What are some practical benefits of using ball screws vs. leadscrews?
- There is virtually no backlash in the ball screws. Here are the specs for our ball leadscrews:
- Rolled Ball Screw with BSH Nut.10mm Diameter, 2mm Lead.C7 Accuracy, P1 Preload.
- The linear accuracy is 50 micrometers / 300mm. Inchs: Rounded up .002″ / 12.0″ = .00016 / 1.0″.
- Because of the lack of backlash, you can “climb mill” with the ball screws, whereas you have to “conventional mill” with the lead screw.
- Less chatter when cutting.
- A more accurate, and smoother arc and radius cuts.
- The pitch of the ball screw is 2mm (.07874″), whereas the pitch of our leadscrews is either 3/8-20 (.050″ or 1.27mm ) or 10x1mm (1mm or .03937″). Therefore, you have a more significant travel distance per revolution.
- The ball nut and ball screw combination will give your machine much smoother motion.
- The ball screw will also perform for a much longer time and show very little wear over time when compared to the lead screw.
Does the ball screw still allow for manual control?
The stepper motors have handwheels on them so you can do manual work. The only drawback is that the ball leadscrews only come in metric (10 x2mm). Therefore the handwheels only have metric graduations. They also are only available in a right-hand thread. This is not a problem for moving the machine manually, however the direction that a given axis moves may be opposite from our non-ball screw machines.
What is the difference between climb milling and conventional milling?
Roughing cuts and cutting hard materials should be done with “Conventional Milling.” Finish cuts can be done with “Climb Milling.” Climb milling is, as the name implies, the cutting edge of the tool that is literally climbing up the side of the part. Conventional milling has the cutting edge of the tool digging into the side of the part. For a detailed explanation on the difference between the two milling procedures, CLICK HERE for instructions.