Ann K. Johnson – Industrial Sewing Machine Maintenance
The videos below are supplemental to this Circle Time presentation; use the outlines and timestamps to view the topics most applicable to you. To download a copy of the full outline, click here.
Download this handy troubleshooting guide to use for a common, frustrating issue – breaking thread!
Lesson 1 – Industrial Straight Stitch Machine (49:50)
00:35 – tools at the machine
01:30 – machine frame
- parts of the frame
- function and placement of pedal
- adjusting the pedal
- adding wheels/furniture movers
- adjusting height of frame
05:38 – machine motor
- connection to machine
- function of motor
- cleaning
- clutch vs. servo motors
- adjusting motor to tighten/loosen belt
09:55 – straight stitch function
10:17 – safety features
11:00 – thread
- recommended thread types & weights
- re-hydrating thread
13:48 – oiling the machine
- function of self-oiling machine
- draining and refilling oil pan
- cleaning oil pan
- ensuring oil is flowing
- type of oil
16:20 – needles
- recommended needles
- characteristics of needles
- determining correct thread weight
18:13 – bobbin casing
- loading bobbin
- adjusting tension
21:37 – thread tension
- testing tension
- adjusting tension
27:42 – presser foot
- pressure problems
30:11 – troubleshooting – breaking thread
- change the needle
- check that everything is threaded properly
- check and clean tension points
- remove foot, bobbin, and throat plate
- clean and inspect throat plate
- replace throat plate and feed dog
- clean and inspect feed dog
- inspect shuttles for nicks
- walk away and revisit later
42:44 – routine machine cleaning
44:40 – winding the bobbin
47:45 – electronic straight stitch machine
- similarities and differences
Lesson 2 – Blind Hemmer (17:28)
00:36 – how it works
- fabric placement
- function of needle
- chain stitch
02:40 – regulate the tension
- test on the same fabric, with the same thread, in the same direction
- adjusting the tension
04:52 – adjust the bite
- function of dials
- testing the bite
08:40 – troubleshooting – skipped stitches
- replacing needle
- adjusting bite
- adjusting tension
10:10 – lock the chain stitch
11:21 – oil the machine
13:55 – adjust the timing
14:47 – thread the blind hemmer
- how to thread the needle
- thread recommendations
Lesson 3 – Serger (16:50)
00:14 – four-thread serger
00:27 – thread the machine
- color coded threads
- replacing a cone of thread
- thread recommendations
02:22 – cutter maintenance
- sharpen the blades
03:25 – clean the machine
- open the machine
06:23 – oil the machine
07:30 – troubleshooting – four-thread serger
10:07 – reattach machine to motor
- refilling oil
- threading the machine
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