Operation Manual

Operation
50 Operating manual 969 - 00.0 - 08/2014
5.12Setting presser foot stroke
The presser foot stroke has twelve levels of 1 mm each.
Correct presser foot stroke setting
Set the presser foot stroke as low as possible, but enough so that
the material can pass through evenly with a consistent stitch
length. In general, the thicker the material and the greater the
changes in thickness over the course of the seam, the higher the
pressure foot stroke should be.
Defects due to incorrect setting
• Stroke too high:
The heavy impact of the presser foot can damage the mate-
rial and the machine is unusually loud.
• Stroke too low:
Stitch is shortened – its length is much shorter than the
length set by the adjusting wheel. Specifically, the machine
does not feed material properly at places where the material
thickness suddenly changes.
5.12.1 Limitation of sewing speed
If the pressure foot stroke is high, the operator must limit sewing
speed to the maximum RPM according to the table, regardless of
material,  Table of maximum machine speeds, page 110.
ATTENTION
The machine can be damaged if the sewing speed is too
high for the presser foot stroke.
Make sure the permitted sewing speed in the table in the
Appendix is not exceeded.