Multiple Drivers for One Stepper Motor

Hey,

Since there are a lot of posts about how to control multiple motors with one driver, I was thinking if it is also possible to do the reverse. I realize that if the control system is sized correctly, this problem would not arise. However, in my case, I tried to use as many components as possible that I already had.
I am currently building a small desktop CNC milling machine to run with a leftover Duet 3 Mini 5+. Unfortunately, since the motor for the Z axis is a bit too weak, I want to upgrade it.

Now to my question: Since I am only operating 3 axes, the two stepper drivers are still idle. Can I run two drivers in parallel to operate a motor with a higher current rating, such as the Nema 23 (https://www.oyostepper.com/goods-80-Nema-23-Stepper-Motor-Bipolar-18-deg-19Nm-269ozin-3A-336V-57x57x76mm-4-Wires.html) with 3A?
I know this is certainly not ideal. However, given the circumstances, it would be an efficient use of resources.

Thanks in advance!

This is a really interesting topic! Using multiple drivers for one stepper motor can help improve torque and provide some redundancy, but it also requires careful synchronization to avoid missed steps or uneven load. Some setups perform better with specific driver types or wiring configurations, and I’ve found that checking detailed guides on stepper motor control can be really helpful there a 5th Axis resource that explains these strategies in a clear and practical way. when you tried using multiple drivers, did you notice any change in heat or efficiency compared to using just a single driver?