Difference between servo and stepper motors in CNC router

1. How much is the servo?

2. at the beginning you can see that 2 different gcode machines make different movements so what's the point of comparing it. The Servo first goes straight backwards on one axis and the stepmotor goes diagonally. I have no doubts that the servo is faster, but I'd rather see the same movements and the real difference in time.

3. thank you i m going to purchase CNC ,,,differnce between steper and servo

4. Which one is a servo and which one is a stepper motor

5. best speed in G00 mode.

6. Left is stepper n right Is servo

7. Unless the software driving the machine is super smart and knows the acceleration curve – does it really matter? IRL it probably has to be a linear curve to sync the two axis when cutting anyway. No? Or what am I missing?

8. There is one thing everyone seems to forget. It is nice to see the machine moving fast when not cutting. But they will both do the exact same when they do. The main advantage of servos are torque and precision. They got higher torque than steppers and they got a feedback loop so they can’t make a mistake, whereas stepper can skip steps.
   Speed only matters when they are in rapid positioning mode before and after cutting.

9. I thought it was feedback also, so if something goes wrong you can resume without rezeroing.

10. Good asmr

11. These "comparisons often put $1000 AC servos against $50 steppers. Start with comparable budgets and it's a different story.

    Both steppers and servos come in a broad range of power, speed and torque. These can be further adjusted with gearing and / or faster balls screws.

    In terms of the part you get at the end and machining time, there's often little difference if the motors are sized correctly and CAM settings are correct.

    This decision is usually made by the budget.

12. which one is better?
    servo or stepper

13. Which one is servo?

14. cutting material will be very little difference in speed

15. Both seem overkill for a tattoo artist though

16. This is servo or hybrid servo?

17. step motor overlaps by servo motor… ???

18. Wow they machined the air perfectly, looks identical on both devices!

19. Since this test only uses the free-running state of the machine (to reposition the milling bit in fact between milling positions) and you should use fixed milling speeds for a specific material and milling bit, the end-result could be negligable when your mill is constantly being used, or am I wrong? I saw some videos where they calculate the proper feeds and speeds for a given bit and material so if the bit is being used 100% of the time, the speed difference can be ignored when the machine isn't using high-speed to move to a different position to start milling elsewhere in the work-piece. You could optimize the pathing in the software to use a minimum of high-speed repositioning instructions, then it shouldn't make a big difference. I could be wrong since I don't have a CNC machine yet, but I'm considering to build one myself using Nema23 steppers (3Nm holding force) for milling wood. And since my budget is limited, I don't think I have much choice (at least to start with) to start using steppers instead of servos.

20. This is an idle move. Which takes up little on average. In real work, the indicators will be different.

21. So glad to come across this actual side by side comparison. This definitely helps out in seeing the value of the additional costs for servo.

Comments are closed.