TOWA TM-501 User manual

From the Library of Superior Sewing Machine & Supply LLC
{Y) 9141a. ,,, A
BOBBIN CASE DIGITAL TENSION GAUGE
Service Manual
Thank you for purchasing our product. Please read this instruction manual before using the
Bobbin Case Tension Gauge.
[LOW] Lamp [LOW] Lamp Display Screen
[mN/gf] Switch [mN/gf] Switch
Pulley
No . 2
Pulley
No . 3
Pulley
No . l
[mN] Lamp
[gf] Lamp
[ON/OFF] Switch
Th read Cutting Groove
Thread Holding
Pin
Thread Guide
Bobbin
Case Holder
Exchangeab le . Please check section 2 below
LOW Lamp: When this light is on, the battery is low. Please change the batteries soon (3 AAA
batteries facing the correct. direction)
mN Lamp: When this light is on, the measurement unit is set to [mN].
gf Lamp: When this light is on, the measurement unit is set to [gf].
Display Screen: Usually displays the tension reading.
In case of any irregularity, it will display
one ofthe readouts below:
[OF]: The maximum "plus" value was exceeded.
[ -
]: Indicates "sleep" mode.
TM-501
TM-502 BC-DB1, BC-DBZ
BC-DBM
How to switch bobbin cases
Industrial Use Rotary Types
All Large Types
1- Push down the movable clasp and release the bobbin case
holder.
2- Insert a new bobbin case into the fixed clasp and push it into
the movable clasp
to complete the operation.

From the Library of Superior Sewing Machine & Supply LLC
{Y) 9141a. ,,, A
BOBBIN CASE DIGITAL TENSION GAUGE
1- Hold the [ON/OFF] switch for over 7 seconds to turn the
device
on or off.
2- Use the [mN/gf] switch to choose the desired
measurement range.
3- Press the [ON/OFF] switch again to reset.
4- Insert a threaded bobbin into the bobbin case and pull the
thread out
of the tension spring. Set the bobbin case by
matching the pointed end
of the latch with the bobbin case
stopper. After threading the thread through pulley #1, #2,
#3 and the thread guide, carefully pull the thread to the
right. At this time the digital display should begin to show
the thread tension.
5- Adjusting the thread tension: Turn the bobbin case
adjustment screw to adjust the tension to the desired
amount.
6- Cutting away extra thread: After measuring and adjusting
the thread tension, keep holding down the unneeded
thread at the thread guide and insert
it into the thread
cutting groove, then push down to cut
it off.
7- After finishing measurement, hold the [ON/OFF] switch for
approximately 1-2 seconds to turn the device off.
• If the device
is left alone for 50 seconds after
measurement, if will go into sleep mode
[-] and 5 minutes
after that
it will automatically shut off.
• Pressing the [ON/OFF] switch or touching pulley #3 while
the device
is n sleep mode will turn the device back on.
1- Thread the needle thread through pulley #3, then
through the thread guide. Next wrap the needle thread
around the thread holding
pin (2-3 times) and hold the en
of the thread against the device body with your finger to
keep
it in place. While doing so, measure the thread
tension.
1- As this device
is a precise measuring apparatus that has been carefully tested and adjusted, please do not
drop
it, hit it against anything or disassemble it.
2- There are several adjustments necessary for garment sewing. Among them is the measuring of thread
tension
of the under thread in the bobbin case before starting any sewing work when the material or cloth to
be sewn has been changed to a new one.
3- Please keep this device away from thinner oil, benzine oil, alcohol or petroleum.