Upgrading a Sewing Machine Motor

Other Hardware General Electronics
1

Hi!

I'm new to motors and need help selecting the right components for my project. Instead of a standard AC motor, I want something with more torque and customizability.

Requirements:

  • The motor will drive a pulley connected to the sewing machine's handwheel.
  • It should stop at a specific angle so the needle always returns to the up position.
  • Control via buttons and a variable resistor-based foot pedal.

What I Need:

  1. Stepper Motor
  2. Silent Stepper Driver
  3. Power Supply
    4.Microcontroller

I found a commercial solution from Japan (ミシン用モーター 超強力 決定版！) using a Nema 23 (3Nm) closed-loop steppe with a 24V 4A PSU, but it's expensive and overkill for my needs.

Looking for recommendations on motor, driver, PSU, and controller! Thanks for any help!

2

More torque at the wrong time will destroy synchronization and needles.

The position of the "handwheel" might need a few rotations for one needle cycle. You will need to find that ratio.

3

You should put a sensor, either on the hook or on the thread-puller, probably the latter has more space and it only passes once per cycle. Or an encoder on one of the shafts ?1
There may be slippage on the connection between the motor and the rest of the machine. That may save you needles.

I am never that fond of the needle return system. Why are you upgrading a non electronic machine rather than just getting an electronic one ?