NovoSphere Nema34 Stepper Motor Kit vs NovoSphere Nema 34 Closed Loop Stepper Kit

The Nema34 open-loop kit (A) is the simpler, proven choice for a hobby CNC or router where you can tolerate occasional lost steps and don't need holding power when powered off. The closed-loop kit (B) adds an encoder, a brake and nearly double the holding torque, so it holds position under load and resists stalling. Owners of open-loop Nema 34 setups report reliable running but note missed steps when pushed hard; closed-loop users report fewer stalls and better recovery, at the cost of more wiring and a driver that needs tuning.

• Choose the Nema34 open-loop kit if you want a straightforward, well-understood setup for a light-to-medium CNC, laser or router and don't need a brake or stall recovery.
• Choose the Nema34 closed-loop kit if you need maximum holding torque, a brake to hold a vertical axis when power is off, and encoder feedback that catches lost steps.