Sewing machine with servo motor
He employed his full time assistants to operate the foot pedal of the sewing machine. He wished to control the sewing machine himself.
Additional benefits would include:
Timed interval between pushing the button and stitch (so he can prepare the work and his hands)
Rate of stitch control
Auto stop after a sensible number of stitches.
I fitted a push button controller and AC controller in order to drive the existing motor. This partly worked but it would stall in the thick fabric when set to a preferred slow speed. The concept was however proven.
A 3D printed pulley was clamped to the hand wheel and a brushless servo motor with closed loop speed control now drives the machine. The controller has been programmed to perform a single stitch (one button) or a timed continuous stitch via another button. The number of stitches is controlled by a dial he can adjust.
The motor was mounted on a tensioner arrangement made from board. The client plans to make up a full work table and the machine will be built into that over time.
A Copley Controls commercial servo controller was programmed to do this - please contact me for details as I have others and they might be useful for another project.
Out client has complete control over his sewing activity without any assistance. His machine can single stitch, and slow stitch, with plenty of power, improving the quality of work produced.