nema 34 stepper motor and an encoder can drive the turntable. Six radial holes need to be drilled on one part. He made a total of 3000 holes and 500 holes. This is only the first trial run, and more drilling may be done in the future.
The components discussed are small and light. Instead of using heavy industrial equipment, he used nema 34 stepper motor and Arduino to make an all-electric rotating indexing fixture, which gave him a four-axis rotating fixture.
His idea was to use nema 34 stepper motor directly to rotate the workpiece without any transmission, but he needed to build his own rig to achieve this.
His original prototype used Arduino Uno, and in order to save space, he replaced a Pro Mini in the final version.
Arduino is connected to a solid circuit motor driver. This is the only driver, and in several of his attempts, he managed to keep nema 34 stepper motor with enough torque to prevent the workpiece from moving while drilling.
The number of holes to be drilled is hard-coded in Arduino, so he only needs a button. Every time a button is pressed, nema 34 stepper motor advances 60 degrees and gives it six equal-spaced holes.
He uses the nema 34 stepper motor, which means a strong power supply. He took off the power from an old laser printer, which had 24V DC and 5V output. It was very convenient. The next step is to study mechanical assembly. He machined a tool rod attached to the axle of nema 34 stepper motor.