Hybrid ball-screw and lead-screw stepper motor

Linear speed equals lead multiplied by motor revolutions per second. For example, a 2 mm lead at 300 r/min gives 10 mm/s; a 1 mm lead at the same rotation gives 5 mm/s. These are calculated geometric advances, not demonstrated maximum speeds. Establish the acceleration distance, move time and dwell before selecting a curve.

The 42 mm ball-screw charts separate 34, 40, 48 and 60 mm motor bodies and distinguish BS0801, BS0802, BS1202, BS1205 and BS1210. The charts state 40 V, two microsteps, 100% constant current and no acceleration. A starting or accelerating carriage therefore needs separate validation; the largest thrust shown anywhere in the family is not an available thrust at every speed.

The catalogue instructs users to keep actual load below 50% of the motor’s maximum thrust at the actual operating speed. Include friction, gravity where relevant and acceleration force in the load assessment. Selecting against a low-speed graph maximum while running farther along the curve defeats that margin.

The travel-per-step numbers describe command increments. Screw lead error, nut clearance, compliance, load direction and the machine’s referencing method still affect achieved position. Specify allowable absolute error, bidirectional repeatability and backlash separately. An anti-backlash nut is an option for ordinary lead screws; the catalogue notes that it reduces efficiency, so its friction must be included in the drive choice.