I continue to have trouble with my Pfaff machine. I had the bobbin tension adjusted by a repairman and it worked beautifully for about a month. Since then the top thread shows through to the bottom. I've tried adjusting the top tension and there is virtually no change in how the top thread looks on the bottom of the fabric once it is set at 4 (it goes through nine). So I ordered a new factory adjusted bobbin. Unfortunately it did not solve my problem. Any ideas? It seems to me that there is something wrong with the needle thread tension mechanism but I don't have a clue as to how to adjust this. Thanks Carolyn
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Re: Pfaff 1475 tension problem.
Many users also reported similar bobbin tension adjust problems. But do you know it can be fixed by yourself? I suggest you to order the following product:
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1. The top loading bobbin cases have small brackets to keep them from turning or moving up or down.
2. Adjust brackets with small screwdriver. Allow enough room for thread to flow through.
3. Rotate hand wheel both directions to make sure the bobbin case doesn't move around. Also, watch the thread to see if it is flowing across the top of the bobbin case.
4. You may need to slow down movement of your "free motion". Also, make sure you are using the right pressure foot.
Make sure your bobbin is the right size. If it is too high it won't turn freely. Also, make sure you drop the bobbin in so it rotates clockwise. The tension must adjusted by hanging the bobbin from your hand and bob it up and down gently. It should move about one inch downward once adjusted properly. The hole in your plate should be checked to ensure the center where the thread dispenses is smooth. Use a finger nail file to smoothen if needed. Now, adjust the top tension to four. You may need to adjust just slightly. Just remember when you remove the bobbin assembly to put a drop of oil on the race. (Many forget this). When you rotate the handwheel towards you the bottom thread should come up. If this doesn't happen then you will need to have adjustments made.
It sounds like you need to adjust the bobbin tension. There is a small screw on the bobbin case to tighten/loosen the thread's tension coming out of the case. Refer to the user manual on the procedure to set it.
This is usualy a thread tension problem. Adjust the upper thread tension first. If tightening the upper thread tension doesn't work, then adjust the bobbin holder (lower thread tension) check with the user manual for your specific machine for the correct procedure.
Rule of thumb.. Loops on the bottom, problem on the top. Loops on the top, problems on the bottom.
Set your upper tension at 4, and rethread the machine from the top. Just before you thread the needle, but the presser foot down. If the thread pulls right thru easily, then the thread is not thru the tension wheel right. Because, if you can't pull the thread thru with the presser foot down, you have it threaded right.
Thread tension. Beware of adjusting the bobbin screw. Pfaffs maintain their tensions just fine without adjusting the bobbin tension, unless you're using some crazy thick or fine thread. If you must change your bobbin tension, you would be well-advised to buy an extra bobbin case, because re-calibrating your tensions after changing them can be less than fun.
Increase your top tension, and your looping should cease. I normally keep my tension around 4.5. Also make sure you're using a good quality thread, and that there's nothing in the upper tension assemblies. Sometimes a tiny piece of debris can keep the top tension from applying enough tension, so turning the machine off and blowing some canned air in there can help as well.
I don't have the same brand as yours, but on my machine there is a little screw on the bobbin case that you tighten to increase the bobbin tension. If you've got one, turn it 1/8 to 1/4 turn at a time.
all machines thread the same. TTN tension,take up,needle.
Beginning with the spool, guide the
thread through the thread guides to the tension assembly. Pull the thread
through the tension assembly and test it to make sure the tension is working
(To do this test, adjust your tension setting to normal or medium or 5 or
something in the middle. Raise the presser foot and pull the thread through the
tension. It should pull easily!! Lower the presser foot and pull the thread. It
should pull noticeably harder.) If it passes this test, continue up through the
take up lever,then down through the thread guides to the needle. Make sure your
needle is fully inserted and turned the correct way.( If you load your bobbin
case from the left side,the needle rule is normally FLAT to the RIGHT is RIGHT.
There are some exceptions. If you have a newer style drop in bobbin or your
bobbin case loads in the front then the rule is FLAT to the BACK.