You can’t add a synchronizer to the CSM1000 to give it needle positioning. You have to select the CSM1001 model motor option which comes with the synchronizer and is programmed for needle positioning

The CSM1000 series of High Torque D.C. Electronic Servo Motors from Premier by Consew includes a number of models.
The CSM1000 is a 3/4 HP (550 Watt) Brushless Servo Motor. Energy Efficient – Saves up to 70% Electricity. Speed: 0–4,200 RPM.
The CSM1001 is a 3/4 HP (550 Watt) Brushless Servo Motor that includes the Needle Positioner (synchronizer)

• No Noise when machine is not running
• No Vibration when machine is not running
• Draws Minimal Electricity when machine is not running
• Uses the same mounting holes as a clutch motor
• Easy to adjust speed & motor direction with buttons
• No clutch disc
• Adjustable belt tightener
• Belt guard, pulley & mounting hardware included
• Light weight Approx. 10 - 12 lbs (5 kgs)
• Starts-up at low speed
• Works well on heavy duty machines
• Models ending in "01" include the Needle Positioner (synchronizer)
(-01 models will run with or without the synchronizer)

Changing a Clutch Motor to a Servo Motor by Sewing Machines Australia. A variable speed servo motor delivers power savings, silent operation and precise control for your sewing machine. Often older machines with a clutch motor can receive a new lease of life by installing a servo motor. This video is a step by step guide to removing an existing clutch motor and then installing a new servo motor.

SEWLINE SLS-2000 Sewing Machine Servo Motor Info and Demo.I recently installed a Sewline SLS-2000 Servo Motor with needle positioner on my Consew 226 and thought I'd post some info on this motor since I couldn't find much when I looked. I'm very happy with it and all its functions and power.
  • US Warranty 90 Days labor on defects in materials and workmanship.
  • Non-US Warranty: 30 days parts and labor
Other Images

icon The CSM1001 also includes the needle positioner (synchronizer.)

icon Specifications of models available