Okay, quiz of the day to help me out…
My CNC plasma machine runs its steppers on 12v DC as that’s the output of the PC PSU that I had to hand when I built it.
My drivers are okay up to 30v DC so I shouldn’t have any problems in that department. The motors are Nema 23’s.
My question is; “what difference will running the drivers and motors on 24v DC?”
Faster, slower, more or less torque? help please guys…
When talking about steppers and voltage/current, Just remember that the current is for torque, and the voltage is for speed. What a higher voltage gives you, is the ability to re-charge your coils FASTER than a lower voltage., therefor theoretically giving you a faster high end speed, and faster acceleration.
Hope that helps.
Depends on your drivers. If they’re constant voltage drivers, increases voltage to them will allow them to overcome inductance in the motors faster, allowing higher max speeds and higher torque at any given speed. If they’re constant current drivers, which I doubt because those are pricey, it shouldn’t do much of anything.
Sounds like if I go ahead and fit a 24v supply, I’m going to get a speed increase which is exactly what I need. Thanks guys I think I’m going to upgrade.
Why not upgrade to 50 or 60 VDC?
The drivers aren’t rated for it.
Yeah, unfortunately the drivers I could afford at the time of building will only handle up to 30v DC so 24v should sit pretty.
In my opinion you will not get any speed increase changing the voltage to 24volt, it is only the pulse frequency that change the speed. The tork is increasing with higher voltage. And you should then be able to increase the frequency if your controller support it… Sorry for the language
Well yeah, pulse frequency controls speed. However, your speed is usually limited by torque fall off not the max pulse frequency. So increasing torque allows you to increase frequency without losing steps.