Bernette Airlock b64 - Page 4

Table of Contents
4
2020-09 EN 5040064.00A.04
6.8 Adjusting the Differential Feed ............................... 49
Default value "1" ....................................................... 50
Gathering "1.5 – 2" ................................................... 50
Stretching "0.6" ......................................................... 51
6.9 Setting the Stitch Length ........................................ 52
7 Threading ............................................................. 53
7.1 Threading preparation ............................................ 53
7.2 Air Threader ........................................................... 54
Threading the Looper Threads UL/blue, LL/red ............. 55
Threading the Looper Thread with an auxiliary thread . 57
Using the Threading Wire ........................................... 57
7.3 Threading the needle thread .................................. 58
Threading the Right Needle Thread RN/green .............. 58
Threading the Left Needle Thread LN/yellow ............... 59
7.4 Thread change ....................................................... 60
Knotting thick thread .................................................. 60
Changing the needle thread ....................................... 61
Changing the looper thread ........................................ 61
8 Sewing test .......................................................... 62
8.1 Performing a sewing test for an overlock stitch ...... 62
8.2 Optimizing stitches ................................................. 62
4-/3-thread Overlock ................................................... 63
3-Thread Narrow Seam ............................................... 64
3-thread super-stretch / 2-thread wrapped overlock .... 65
3-thread flatlock ......................................................... 66
3-thread rolled hem / 3-thread picot stitch .................. 67
2-thread rolled hem .................................................... 68
2-thread flatlock / 2-thread overlock ........................... 69
9 Practical overlocking ........................................... 70
9.1 Securing overlock stitches ...................................... 70
Sewing in the overlock chain at the start of the seam . 70
Sewing in the overlock chain at the end of the seam .. 70
Securing overlock stitches ........................................... 71
Knotting the overlock chain ........................................ 71
9.2 Undoing overlock stitches ...................................... 71
9.3 Flatlock .................................................................. 72
9.4 Gathering .............................................................. 73
Increasing the differential feed .................................... 73
Pulling the needle thread ............................................ 73
9.5 Sew outer corners .................................................. 74
9.6 Sewing inner corners .............................................. 75
9.7 Sewing inner curves ............................................... 75
9.8 Sew outer curves and circles ................................... 76
10 Appendix .............................................................. 77
10.1 Storing and transporting the machine ..................... 77
Storing the machine ..................................................... 77
Transporting the machine ............................................ 77
10.2 Maintenance and cleaning the machine .................. 77
Cleaning the machine .................................................. 77
Cleaning the Looper Area ............................................ 78
Cleaning the air threader pipes .................................... 79
Cleaning the suction feet ............................................ 79
Oiling the machine ....................................................... 80
10.3 Troubleshooting ...................................................... 81
10.4 Specifications .......................................................... 82