Bernina Artista 730, Instruction Manual

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18
The Sewing Computer – Operating Instructions
Needle/Thread Combination
In order to check the needle/thread compatibility, the correct size thread must correspond with the correct
size needle.
Needle Summary
BERNINA uses needle system
130/705 H. This system number
refers to shank shape as well as
to length and form of the needle
point.
130/705 H S 70
Shank diameter
= 0.7 mm (needle
size)
Needle point
e.g. medium ball point
Needle scarf
Flat shank
Shank length
Checking the Needle Condition
The needle condition should be checked and the needle
replaced regularly. A defective needle not only damages the
sewing but also the sewing computer.
The following are the guidelines: replace needle when starting a
new sewing project or as required.
•
more about this subject see «Trouble Shooting» on page 186
••••••••••••
Correct Needle/Thread
Combination
When sewing, the thread should
travel smoothly down the long
groove on the front of the
needle. The thread can be
secured optimally.
Too Thin Thread or Too Thick
Needle
The thread does not travel
smoothly in the groove. Faulty
stitches and damage of the
thread can occur.
Too Thick Thread or Too Fine
Needle
The thread rubs on the edges of
the groove and can get jammed.
This can break the thread.
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