Product Description
Jack F4 Wheel Sensor
This wheel sensor detects hand wheel/main shaft position electronically, feeding data to the control box for accurate needle positioning and speed control.
Fits
- Jack F4 direct-drive single needle sewing machine
Why Replace It
A faulty wheel sensor causes incorrect needle stop positions, erratic speed control, or error codes on the display panel.
FAQ
My machine shows a position error — could this sensor be the cause?
Yes, a failing wheel sensor is a common cause of position-related error codes on direct-drive machines.
