Innov-is 750E
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FAQs & Troubleshooting |
How do I adjust a bobbin case using an embroidery pattern?
Using a small slotted screwdriver, turn the slotted-head (-) screw to adjust the bobbin case tension.
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 Bobbin case |
- This page describes how to adjust a bobbin tension for embroidery using a bobbin case.
- Download an embroidery pattern for adjustment, embroider the pattern and check a result, then adjust a bobbin case if necessary.
To adjust the bobbin tension for embroidery function, using the bobbin case, turn the slotted-head (-) screw with a (small) screwdriver.
- Prepare following items.
(1).Screwdriver(Small)
(2).Bobbin wound
with bobbin thread(3).Embroidery pattern
(will be downloaded
in Procedure 4 below.)(4).Fabric and
embroidery frame
- Install a bobbin wound with bobbin thread into a bobbin case set in a sewing machine.
- Make sure the upper thread tension is set to 4.0.
- Download an embroidery pattern and transfer it to the sewing machine.
Click the "Download" link to download the embroidery pattern.
The following 3 methods are available to transfer the downloaded embroidery pattern to the sewing machine.
- Embroidery card
- Save the downloaded embroidery pattern into an Embroidery card.
- Select the downloaded embroidery pattern from the embroidery card.
- PC(Depending on the model available on the usb port.)
- Recall the downloaded embroidery pattern from the PC.
- Embroidery card
- Sew the downloaded embroidery pattern on a fabric and check the result, referring to stitch samples below.
If you do not get the correct result, remove the bobbin case from the sewing machine and adjust it. - When adjusting the bobbin case, be sure to remove the bobbin from the bobbin case.
- DO NOT adjust the position of the Phillips (+) screw on the bobbin case as this may result in damage to the bobbin case, rendering it unusable.
- If the slotted-head screw (-) is difficult to turn, do not use force.
Turning the screw too much or providing force in either (rotational) direction may cause damage to the bobbin case.
Should damage occur, the bobbin case may not maintain proper tension.
 surface of fabric |
 underside of fabric |
Be sure to check if a bobbin is installed correctly before you embroider the pattern. If you can only see the bobbin thread on both sides of fabric as shown in the left picture, the bobbin is not installed correctly. For details, refer to "Correctly installing a bobbin |
When you adjust a bobbin case, turn a slotted-head(-) screw by a screwdriver(small).
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 DO NOT adjust the position of the Phillips (+) screw Adjust with a screwdriver(small). |
| <Correct tension> * Upper thread slightly appears on the underside of fabric. | ||
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| surface of fabric | underside of fabric | |
| <Bobbin thread is loose> * Bobbin thread appears slightly on the surface of fabric. | ||
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| surface of fabric |
underside of fabric |
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If this occurs, turn the slotted-head screw (-) clockwise, being careful not to over-tighten the screw, approximately 30-45 degrees to increase bobbin tension.
| <Bobbin thread is tight> * Upper thread on the surface of fabric seems to be lifting/looping and bobbin thread is not seen on the underside of fabric. | ||
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| surface of fabric |
underside of fabric |
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If this occurs, turn the slotted-head screw (-) counterclockwise, being careful not to over-tighten the screw, approximately 30-45 degrees to decrease bobbin tension.
After adjusting a bobbin case, make trial sewing to check thread tension.
If the thread tension is still incorrect, repeat the Procedure 5 until you can obtain a correct thread tension.
