Question about Juki MO-644D Mechanical Sewing Machine
I just recieved my new Juki. The top stich is beautiful but the underside on the bottom thread has huge and erratic loops that won't tighten. I have tried loosening and tightening all four thread tensions and nothing helps - help!
If you have the instruction manual, you might read the chapter which describes the proper adjustment for threads and fabrics.
If you do not have one, try to find it on eBay. It is the huge source of everything.
Posted on Feb 21, 2012
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Posted on Jan 02, 2017
always remember to keep the tension the same and try to fix all other things Try to clean the machine I use canned air it is the best thing going. then check the needle is it bent or is the end burred well replace it any way. and each fix try the machine. only change the tension as a last resort and always note the positions and put back to that and if you take the machine in to be fixed leave the bunched up fabric and thread as it is this will give the repair person something to look at.
Posted on Mar 08, 2009
Your hook might not be timed correctly. Sometimes a thread or fabric jam can dislodge the hook. When your needle is just starting to move upward from its lowest position, the eye of the needle should be just below the hook.
Posted on Mar 17, 2010
SOURCE: hi, I have a Juki
Did you figure this out? Does the Juki DDL-552 zig zag (304) or just straight stitch (301)?
Are you trying to adjust the length? the zig zag width? or the actual TYPE (eg. locking stich, blind stitch) of stitch?
Posted on Jan 08, 2012
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Looping thread underneath is a top thread tension issue...
I have written a 5 page illustrated Tutorial on overcoming this
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