Juki F600 Problems : 5 Common Issues (Explained)

With the Juki F600 users can have their sewing and quilting expectations met in just one go. It is a computerized sewing machine with an impressive 225 stitch patterns including 16 buttonhole designs and 4 lettering fonts. It is no wonder then that the Juki F600 sewing machine comes at a staggering $1900USD. Although the Juki F600 has all these great features, cost can be a really big problem for anyone trying to get a sensible sewing machine that can do more that just standardized sewing. And with a price point that massive, does the Juki F600 really live up to the expectations users and sewist have to such a sewing machine. Well let’s find out.

Table of Contents

1. The Sewing Machine Stops Suddenly

This is a problem that occurs all too often with the Juki F600, when sewing the machine will suddenly stop. It is usually because you will be using the sewing machine at an unusually slow pace over long periods of time. The Juki F600 has a built-in mechanism that automatically cuts off power when the motor is on a path to overheating. This is more of a safety mechanism than anything else.

To Do

  • You have to turn the Juki F600 off and wait for at least 10 minutes.
  • The safety mechanism will then automatically turn the sewing machine on, returning it to its default settings and thus returning the sewing machine back to normal.
  • Make sure to use the sewing machine in good temperatured rooms (usually 5 – 40 Degrees Celsius.)

2. The Sewing Machine Won’t Work

It is truly agonizing to press the foot pedal of your sewing machine in anticipation for it to turn on, only to find out it isn’t turning on. Although you may attribute this as a problem with the Juki F600, sometimes it can be due to a couple of misaligned things. When the sewing machine won’t work or turn on it is because the needle is hitting the presser foot such that the sewing machine’s sensors pick up on this and block the Juki F600 from even starting to avoid damage to both the needle and presser foot. It can also be due to the needle falling into or under the needle plate also causing the sewing machine’s sensors to hault the machine’s motion.

To Do

  • If the needle is hitting against the presser foot, then it is because the presser foot is the wrong size or totally not the correct one you’re supposed to be using.
  • Make sure when inserting the needle that you screw it securely into the back of the needle clamp to avoid problems whereby it just falls.
  • If the needle happens to fall, be sure to remove it from the needle plate area to get the sewing machine working again.

3. The Sewing Machine Isn’t Feeding Fabrics

In order for the Juki F600 to stitch correctly, the feed dog mechanism located on the needle plate needs to be working correctly as well, that is in tandem with the sewing machine’s needle. But when this problem occurs on the Juki F600 it is largely due to the feed dog being set to be in a drop condition meaning the knob that controls the feed dog is on the right side. Soft fabrics like towels and silk will also cause this problem on the Juki F600 sewing machine.

To Do

  • Make sure that the knob that controls the feed dog is rotated to the left side (counterclockwise.)
  • The stitch length should always be set between three and five.
  • When a stitch pattern is selected, or re-selected, the sewing machine will go back to its default or regular settings.

4. The Sewing Machine’s Thread Breaks

This occurs regularly on the Juki F600 sewing machine due to the incorrect threading of the machine. Most people still cannot thread their sewing machines correctly and so they end up blaming this problem on the quality of the sewing machine but it will be in fact an error in threading the sewing machine. It can also be due to an incorrect setting on the manual thread tension adjustment. The needle’s size may also not be correct so as to match the thread’s quality and size.

To Do

  • In such a case it is crucial to re-thread the entire Juki F600 sewing machine correctly. If the problem continues then the needle might need some replacing as well.
  • You have to adjust the manual tension correctly, taking reference from the Juki F600’s user manual.
  • Also make sure that the thread and needle’s size go together.

5. The Sewing Machine’s Needle Cannot Be Threaded

The Juki F600 sewing machine is featured with an automatic, or self, threading mechanism. Located on the needle threader is a hook that goes through the needle’s eye and then places it such that it sits there entirely during the sewing process. When this doesn’t  work it becomes a problem because the needle threader’s hook will not be turning in order to insert the thread through the needle’s eye.

To Do

  • Fortunately this is one of the many safety mechanisms in place for the Juki F600 sewing machine. When the needle is not in its up position, the needle threader will automatically not turn because of this. This is in place so that the hook of the needle threader is not damaged. So always make sure that the needle is in its correct up position and inserted correctly.
  • When inserting the needle, be sure it goes all the way up to the needle clamp’s end.


The Juki F600 computerized sewing machine is heavily praised by most of its users because it is truly a good sewing machine, which nowadays is quite rare to find. Juki is known for making, not only top quality sewing machines with industrial grade features but also sewing machines that have really useful features and the Juki F600 computerized sewing machine does not shy away from that concept. It is packed with useful features that have the user in mind and you can tell from just looking at the machine that it will make your sewing designs come to life.