Janome MB-7e - Adjusting the Timing Belt Tension

54
5 mm
Adjusting the Timing Belt Tension
1. Remove the spool stand, head set right cover and
left cover (see pages 4 to 6).
2. Place a scale on the DC motor. Set the push-pull
gauge in line with the scale as illustrated and push
the timing belt. The gauge should read 300 grams
 whenthebeltdeect5mm.
3. If the belt tension is too tight or loose, remove the
setscrews A (3 pcs.) and Shielding case B, then slightly
loosen the setscrews B (2 pcs.) and move the idler in
the direction of the arrow to adjust the belt tension.
Tighten the tow setscrews B securely and check the
tension again.
4. Attach the parts removed in step 1.
Push-pull gauge Timing belt
Shielding case B
Setscrew A
Idler
Setscrew B