Hi I have a Juki DDL 555-5. hand wheel hard to turn, removed belt everything works as it should, try to turn pulley by motor and that's where it gets very hard to move.
I am assuming that this machine has an automatic cut and presser foot up, that you can control with your foot:
1. Depending on the age of your machine (some of these are about 20-30 years old, I believe), there are several plugs on the front of a box that is attached to the bottom of the motor. Unplug and replug each of them and make sure they are completely plugged back in. There is also sometimes a small black knob that controls the speed of the back tack, in that same row. You might try to turn it very slightly one way or the other. Test after each movement.
2. If there is a cable that runs from the hand wheel to the computer under the motor, check the length of it to make sure it hasn't gotten against the belt and made a hole in it.
3. Lastly, make sure that the thread cutter(the blades that are just under the needle plate and feed dogs) isn't hung up. I know that you said the hand wheel turns freely, but if there is a blockage of the knife movement( many times from a dull knife or the tiny circular metal "lasso" right above the knives that controls the thread for the knives. can become bent or broken) it will interfere with the knife movement. As weird as it seems, this can affect the tension because it makes the computer think its time to hold/release the thread for cutting.
, I would put my money on a problem in the computer since it turns freely when the belt is off. The only way I know to find out for sure,is to have the motor professionally tested. With the advance of machine computers, it is unfortunately possible that you will not be able to get it fixed, if it is very old. I have had machines that all the parts, especially computer boards, have become obsolete and I have had to take the computer off and replace it with a plain servo motor. Since all of the automatic cutting, etc. is actually in the motor, it becomes a good sewing machine with no automatic features.
Hopefully, yours is not one of those and it is just a loose cable or other small problem.
Good Luck, Shirley
Oct 02, 2017 |
Juki Sewing Machines