Re-Setting The Needle Bar Height - Strongarm Walking Foot Sewing machine User Manual

Timing a sewing machine is all about lining up the needle and the hook so the hook can catch
the thread and make the stitch.
There are three things to set, in order of importance-
1. How far down the needle travels, otherwise known as needle bar height;
2. How close the hook is set to brush past the needle, or left-right timing; and
3. How far around the hook is when the needle is all the way down, or rotational timing.

Re-setting the Needle Bar Height

If the needle on your Strongarm sewing machine hits a hard object such as a grommet or zip,
or if you run into impenetrable fabric such as the reinforced ends of heavy sails, the needle
bar may slip to prevent damage to the machine's gears. Fortunately re-setting the needle bar
height is a simple job.
First, remove the end cover from the machine.
Then turn the balance wheel forward until the needle is at its LOWEST point.
To check the correct needle bar height, measure the distance between the top of the needle
bar and the top of the needle bar support. The distance should be about 16mm.