Unless I manually tension the embroidery thread by holding the the thread between my fingers. I will get repeated "broken thread" warning, and no borken thread exists. I have followed the threading instructions and "flossed " the thread back and forth as suggested. Its as if the tension is not engaging.

Likely uneven feed (top thread snagging on spool). This machine has a horizontal spool so be sure the the spool cap is larger than the spool and double check with the manual on which way the thread is supposed to come off the spool... I believe it should fall forward, so if not then flip the spool.


Could also be top tension is extremely high.


Or possibly the bobbin thread has no tension... be sure to hold the bobbin spool with right index finger while you guide bobbin thread into slit. You should feel the bobbin thread slide underneath the bobbin case tension spring. See machine instructions.

I suspect the bobbin thread has escaped its tension spring. If you give the bobbin thread a quick short tug and the bobbin spool spins then likely the thread is not behind the tension spring. This usually causes hook jam but not always.



First be sure you have threaded per machine instructions... see below.



Next turn handwheel and position needle at the high point of stroke (always when loading bobbin). Remove and re-insert bobbin. Now, to be sure the bobbin thread is fully positioned behind the tension spring, before you move the bobbin thread into the notch, place your right index finger on top of the bobbin spool to prevent the bobbin spool from turning. Hold thread snugly (in slight tension) as you move it towards the back of the notch. You should feel the thread slide in place behind the spring. Let loose the spool and lightly pull thread. Note the resulting change in tension. (don't forget to set top thread tension back to a more normal setting)



Comment here if you require further assistance.



If you need... your manual may be downloaded at no charge from the Janome site.
https://www.janome.com/siteassets/support/manuals/embroidery-models/inst-book-mc350e.pdf

You need to loosen the upper tension until the upper thread no longer pulls the bobbin thread up. If your bobbin case has a hole in the finger, this problem can frequently be resolved by running the bobbin thread through that finger eye.

If you look at the bobbin pictured below, there is a hole at the end of the finger. (Some machines have it, some don't):
http://www.sewingmachinesplus.com/pd60-0015347200.php

...

You are getting a thread breakage error. I'm presuming that you are getting repeated error 06 codes to write in. Before I start, though, you also get that error code if your bobbin is out of thread. The thread sensor thinks your thread has broken because your thread is not seated at all, or not seated enough, between your tension disks, which are on the right side of your tension dial. Take the cover off the thread path (page 52 in your user's manual), lower your presser foot, and turn the tension dial to zero. Use UNWAXED dental floss, and floss between those disks. Chances are there is loose threads and/or lint between the disks, preventing the thread from seating properly. When threading, make sure that your presser foot is UP (tension disks are spread to accept thread), and apply tension to your thread, both at the top and bottom, to make sure your thread gets between those disks. Thread it a few times with the cover off, if necessary; you don't need to have it on to embroider, although you can't use your needle threader with it off.

Unthread the machine fully. Remove the bobbin. Is the bobbin thread the same as the top thread? Is it a Quality thread (yes, cheapie thread can give big issues!!) Do you have several different threads wound onto the bobbin?? Is the bobbin thread wound on quite tight? If you push your finger nail into the thread wound onto the bobbin, it must not feel soft or spongy. Check if there is any roughness / burr on the any part of the shuttle hook. If so, remove it with 800 grade wet and dry abrasive or similar. Put in a NEW needle as per user manual specs (not a 'new' one you used before 'just for a little bit'.!) REPEAT - put in a NEW needle - amuse me!!. Place the bobbin into the bobbin holder (the CORRECT direction - yes there is a Right and a Wrong direction!), thread it ready to put back into the machine. BEFORE you do, hold onto the thread tail and let the bobbin and bobbin case dangle. Thread should slip thru when you give a gentle pull upwards. If no slip, loosen the tension on the tension finger a LITTLE. If it slides down easy, tighten it a little. Fit the bobbin into the machine. Lift the presser foot (this releases the top thread tension discs) Check there are no bits of thread or fluff between the tension discs Rethread the top thread - check the thread path is 100% correct. Hold onto the end of the needle thread and draw up the bobbin thread. Hold both threads, start to sew - check the result. Tip : If you use a different color bobbin thread (same brand etc etc) it will help you to see more easily what is going on. You should be seeing some of the bobbin thread color on the top side of the sewing. If not, INCREASE top tension a little - retry.If there is a lot showing, decrease top tension. Good luck

Hello,

The Pfaff 7570 Creative Designer is a computerized sewingand embroidery machine that has the ability to connect to the computer, andhave embroidery designs sent to the embroidery machine. The sewing andembroidery machine has many features, including hundreds of general sewingfunctions, a separate embroidery module, and on-screen editing features. TheCreative Designer 7570, manufactured in the 1990s, was the first sewing andembroidery combination machine ever made by Pfaff.

1. Usingthe Sewing Machine
1 Turn on your sewing machine using the "On"button located just below the turn wheel on the right side of the machine.Thread your Pfaff 7570. Note that Pfaff sewing machines thread from left toright, not right to left like other sewing machines. The upper tension discsshould be raised at their highest position while threading, and the presserfoot should be raised up until you thread the needle. Drop the presser footright before you thread the needle. The prevents thread problems during use. 2 Insert a full bobbin and retrieve the bobbin threadthrough the thread plate. Raise your sewing foot and needle to its highestposition; hold the needle thread taught with your left hand, lower the needleinto the thread plate using your right hand, and then raise the needle. As youraise the needle, the needle thread will catch the bobbin thread, and pull itup. There should be a loop of thread intertwined with the needle thread. Usetweezers, your finger, or a straight pin to retrieve the bobbin thread that isvisible through the thread plate, and pull it through the plate. 3 Place the fabric under the presser foot, and drop thepresser foot. Choose the stitch you want to use from the top stitch display,right above the top thread feed. Press the '0-9" button located on thesewing machine's front panel, and a display screen will come up. Input thethread number, and press the 'OK' button located on the sewing machine's frontpanel. The stitch will display, and you are ready to sew. Repeat Step 3 foreach stitch you want to use.

2. SettingUp the Embroidery Unit
1 Turn the sewing machine off. Take out the embroiderymachine unit, locate the connection bushing on the back of your embroideryunit, and match it up with the connection bushing on your sewing machine. Theconnection bushing should be located next to a yellow sticker on yourembroidery unit, and somewhat resembles a serial port on a computer. Slide theembroidery unit onto the sewing machine with the sewing machine turned off. Connectto the bushing carefully as you slide the embroidery unit onto the sewingmachine. Use your embroidery unit manual if you need assistance. 2 Insert an embroidery card. Your embroidery unitshould contain an embroidery card labeled embroidery card 1. Use that or useanother Pfaff 7570 card that you own. Turn on the sewing machine. 3 Open the bobbin case area just below the threadplate, and lower the feed dogs by pushing the feed dog switch to the right.Press the card button located on the front face of your sewing machine. Adisplay with pop up; choose embroidery designs or monogram and a new screenwill pop up with your design choices. Choose the design you want, and press"OK." A checklist screen appears. Do everything on the checklist, andpress "OK." Use your embroidery unit manual if you need help. 4 Start embroidery by pressing the foot pedal. At thistime, your hoop should already be attached to the embroidery unit becauseyou've already gone through the checklist. Your embroidery manual displayscolored picture diagrams that are very helpful in understanding everything inyour checklist menu.
Thanks for using fixya

No top tension, follow manual to thread top again and make sure tension dial is set to 5 and thread is pulled between the tension discs fully.

Not completely sure on your model but you have to adjust (loosen) the tension on the top thread to match the tension on the bottom thread. Usually there is a wheel on the upper right of the machine. the tension adjust is the knob inside that wheel. Turn counter clockwise about 1/8 turn. Then try and repeat until it works. Check owners manual for top thread tension adjustment if needed.

Good luck.

Please rate me.

Take the thread completly off the machine and rethread it making sure it goes thru the tension wheel properly.
FYI Loops on the bottom-- Problem is in the threadding.. Loops on the top, problem is with the bobbin.

If the upper thread spool is spinning allowing slack to the inlet of the tension assy and the machine gives a broken thread indication shortly afterward, the pre-tension assy needs to be adjusted. If the machine has the original "snap in" tension assy that was in the first generation of Designer 1, have it replaced with the modern "lay in" tension assy. Slack at the spool should never cause a broken thread indication as long at the thread is in the pre-tension assy.
Sulky thread will work as well in a Designer 1 as any other embroidery thread as long as it is properly adjusted.
One thing that you can look for, when the machine is sewing, watch the thread as it passes out of the left hand side of the tension disks. It should exit the disks at the 9 o'clock position. If it starts to drift up to the 10 or 11 position and then you get a broken thread warning, the pre tension must be increased.