Thread: Superior Electric Steppers
You want to decrease speed of the ballscrew in relation to the stepper, so you get more torque at the screw. Somewhere around a 2:1 ratio would be a good starting point.
Try running some figures through the spreadsheet to see what kind of speeds you can get with different ratios, while still having usable torque to handle the cutting forces.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
If ballscrews then 3 or 4Nm Nema 23 motors will probably work. I've fitted loads of Both 3 & 4nm motors and to be honest see very little difference between them in performance terms so wouldn't stress over which to use. The Key is buying ones with Low inductance. No higher than 4mh ideally closer to 3mh.
These are better motor and will fit your needs.
If you speak to them Don't Let them Bullshit you into believeing there drives are as good or better than Leadshine AM or EM they are not.!
This maybe your Lucky day my friend.?
Just remembered somewhere in box I've got some motors and sure enough there was.!! And guess what they are 2 x Brand New 34's with 10mm shaft 8 wire motors model number FL86STH65-2808A-H. Think about 3.5Nm but would need to dig out motor data sheet.
Also got another 34 4 wire motor with 12mm shaft which is around 4Nm I think. SY85STH65-5904B.
Drop me PM if your interested.
Thanks for the link and recommendation - will look into it.
Sorry to keep harping on about closed loop, but what do you think about using the Leadshine Nema23 kits?
Generally smaller motors the torque doesn't drop off as quick, especially on relatively lower voltage power supplies. Larger motors can maintain a similar torque drop, however you're into high voltage drivers, which carry an additional cost. So you can quite often get better performance from a smaller motor spun faster from a lower voltage, than you can with a large motor run from a less than ideal voltage.
And that is probably as clear as mud, but I've got to go!Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
This machine sounds too nice to be skimping on motor so don't spoil it just for sake of feature that won't give anything more than well setup Stepper would.
For me it would boil down to 2 options. Conventional steppers with Good drives like AM/EM or Servos. Wouldn't waste money on Closed loop Steppers.
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