Tensionmotor notworking tension motor not working

1) Unplug the electrical cord. 2) Loosen the bolt holding the motor to the frame. It should freely move up and down. 3) Remove the belt from the motor and wheel. 4) Replace the belt by placing it into the large wheel first then do the reverse. 5) Resecure the motor. Make sure the belt should be a little loose (tension). Too tight of a tension, would cause the motor to be slow and overheat.

The belt tension may be too tight. adjust the tension from the belt to motor. It should be a little loose.

Your motor has a couple of screws to hold the tension on the belt. Loosen them and pull the belt off and then remove the belt off of the hand wheel. Put the new one on. While you are moving the motor to adjust tension on the belt you should have the motor running so that you can adjust where the motor has the least resistance.

Either you will replace the belt or have to adjust the motor/belt tension.
1. The motor can be loosened by a couple of bolts. This allows the motor to be moved to adjust the tension of the belt.
2. The tension can be adjusted properly by turning the motor on with the foot pedal; low speed.
3. While the motor is running move the motor in a fashion that will loosen or tighten the belt. The correct location will allow the motor to run at it's highest speed.
4. Re-tighten the bolts and retest the machine.

The most common problem is lint or thread between the upper tension discs. It could be the stepper motor in the tension assembly is out of calibration or not working. When you restart the machine you should see and hear the stepper motors calibrate. Observe if the tension discs open and close on start up. If they do and flossing between the tension discs with a larger thread does not fix it you may need a pro.

If you have a size 80 needle in the machine and the presser foot down the needle should bend about an eighth to quarter inch when pulled to the side.

take the belt off the motor and press the pedal see if it is still running slow, if not then there is a tightness in the machine itself.

The tension for the motor belt is adjusted by loosening and altering the position of the mounting bracket of the motor....do not overtighten, it needs to have some give or you will overload the motor.

The tensions are not calibrated properly. To get by, or if you do not want to take it back to the shop, just lower the upper tension a little at a time until it looks ok.
I have 25 years experience working on sewing machines

You need to do a tension test
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(To do this test, adjust your tension setting to normal or medium or 5 or something in the middle. Raise the presser foot and pull the thread through the tension. It should pull easily!! Lower the presser foot and pull the thread. It should pull noticeably harder.)
If it doesn’t work this way then you probably have a piece of thread or lint stuck inside the tension discs. To remove it, turn the tension to 0 zero and raise the presser foot.Using a small screwdriver, open the space between the discs and spray with canned or compressed air. The stuff should come out. Do the tension test again to make sure you got everything and then try sewing again.
sewman7

It is normal for the tension to be relaxed when the presser foot is raised, so , is there any tension when the presser foot is down, even if only a little more ?

Check there is no lint built up between the tension plates as this is common, and will cause the tension to be affected as you describe.

Unusual but possible is that the lever mechanism which relaxes the tension from the presser foot to the tension dials is seized or "gummed up" with lint and old oil.........when was your last full service done ? If it was more then 2 or 3 years, just like a motor car, regular servicing will pay dividends in enhanced performance and longer life.

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