When properly timed, a Juki sewing machine will ensure optimal stitch formation and consistency while sewing. Here’s a step-by-step guide on how to correctly adjust the timing on a Juki sewing machine.
The most important thing to remember before setting the timing is that the machine must be properly lubricated. Failure to do so can cause component wear and tear, and even permanent damage to the machine’s motor. To lubricate the machine, check your owner’s manual for what type and amount of oil to use. Once you’ve done this, the machine is ready to start the timing process.
The next step is to install the needle, timing belt and hook. To do this, start by loosening the hook mounting screw found on the side of the machine. Next, thread the belt through the hook and needle, making sure the timing marks line up. Finally, tighten the hook mounting screw to secure the needle, timing belt and hook in place.
Now it’s time to set the timing. With the belt tensioner open, use a pair of tweezers or a flat blade screwdriver to gently raise the needle slightly above the hook. Then turn the eccentric shaft to the left halving the distance between the timing marks. After this, use the tweezers or screwdriver to adjust the distance until the timing marks are exactly aligned. Finally, secure the belt tensioner and test the machine for optimal stitch formation.
If after making the adjustments, the machine does not produce the desired stitch formation, it may be due to the needle being incorrectly installed or a worn needle bar. To check for a worn needle bar, hold the needle left and right, then push and pull it. If it moves more than 0.1mm, it needs to be replaced. To properly install the needle, orient the flat side of the needle towards the top, or the direction away from you.
Lastly, it is also important to adjust the presser feet when setting timing. First remove the old rocking foot and replace it with yours. Next, using a ruler, measure the distance between the screw hole of the foot and the take-up lever. Then set the presser foot adjusting screw to match the desired distance as indicated in your owner’s manual. After you do this, select the desired stitch length and test the machine.
Check for other Issues
It is also important to check for other issues that may be causing poor stitch formation. For instance, if the needle and hook are not correctly aligned when the machine is running, this can cause the needle to break or cause stitches to become crooked. Additionally, incorrect threading of the bobbin can also cause skips and messy stitches. It is also important to make sure the thread tension is correct. If the tension is too high or too low, the stitches may be inconsistent or misshapen.
Inspect Machine after Use
Once the machine has been used, it is important to inspect it for any signs of wear and tear. To do this, grease the moving parts, check the tension and replace any broken or worn parts. Additionally, it is important to check the belt and needle for any signs of wear and tear. Also check the needle bar, feed dog and bobbin to make sure they’re functioning properly. Finally, make sure the thread is not tangled or jammed inside the machine.
Clean the Machine
For optimal performance, it is recommended to clean the machine regularly. Start by unplugging the machine and removing any lint and dirt from the bobbin area and the needle plate. Regularly clean the feed dog and presser foot to remove dust and debris. Finally, remove old oil and lubricate the moving parts of the machine to reduce friction and keep the machine in top condition.
Follow the Manual
Lastly, always consult the machine’s owner’s manual before setting the timing on a Juki sewing machine. Instructions may vary depending on the type and model of the machine. Proper time should be taken to understand and comply with the requirements of the machine. Following the manual will ensure optimal performance and the longevity of your Juki machine.
Maintenance
Regular maintenance is a must in order to keep the machine running in top condition. It is best to follow the maintenance schedule as recommended by the manufacturer. This will ensure the machine runs smoothly and last longer. Additionally, be sure to check blade and hook gap as this has a direct effect on the quality of stitches produced by the machine.
Troubleshooting
In the event of issues with the machine, it is important to troubleshoot first. Vendor support or instruction manuals should be consulted to identify the issues and resolve them. Additionally, it is crucial to inspect the machine for any signs of wear and tear, such as the needle, feed dog and bobbin areas. If there are any issues, they should be addressed immediately in order to prevent permanent damage to the machine.
Keep Equipment Clean
Finally, it is important to keep the equipment clean as dust and lint can accumulate over time and affect the functioning of the machine. A filtered face mask should be worn when cleaning the machine to limit the inhalation of dust. Also make sure to safely dispose of the lint and dust after cleaning, as this can be potentially hazardous. A few preventive maintenance steps can save you the trouble of expensive repairs in the long run.
