18
MA_218D-TP-R_A4_181015_en
3.5
In order to achieve a starting stitch as even as possible, it is also important to
set an even, synchronous feed motion.
Feed motion
3.5.1
The machine cl. 218D-TP-R is factory-fitted with a pyramid-teethed feed (3).
Feed (bottom feed) (Fig. 9)
3.5.2
The feed cam (1) on the main shaft must be set so that feed begins when the
eye of the needle is located 5 ±1 mm before centre of the plunger on its return
(after lower dead point), measured on the bottom feed, given a stitch length of
6 mm.
At maximum stitch length, the distance between the feed in its rearmost
position and the presser plate must be 0.3 mm.
Setting the feed motion (Fig. 8)
The feed cam is drilled on the main shaft - in other words, the first threaded pin
in the direction of rotation has a tip.
Fig. 8
