1. Lecture 6
Sewing Machine Beds …

2. Sewing Machine Beds … There are different type of sewing machine beds.
The purpose of designing different type of beds is just to allow the easy movement of the components being sewn.
An inappropriate bed makes the operator’s work more tedious and time consuming.

3. Types of sewing machine beds ….
There are four basic types of sewing machine beds
Flat bed
Cylinder bed
Feed of the arm bed
Post bed

4. Machine tables….
There may be a difference with the mounting of machine with machine table.
This is commonly used in over edging machines.
The purpose is just to provide the operator correct and proper work area.
There are two possibilities
Raised Mounting
Submerged Mounting

5. Sewing Machine Beds … Flat Bed Cylinder bed
Flat bed is the most commonly used sewing machine bed.
Cylinder bed
The shape of this bed allows the easy rotation of tubular parts like cuffs

6. Sewing Machine Beds … Post Bed Feed of the Arm Bed
It has relatively small sewing area.
Feed of the Arm Bed
This is typically used for closing the cylindrical parts.
i.e. Trousers out seam after inseam has been sewn

7. Balancing… Order Quantity = 30000 SMV = 10 Shift Time = 480
Lead Time = 10 days
Plant Utilization = 80 %
Attendance = 90 %
Average performance of operators = 90 %

8. Labor required Total minutes required = 30000*10
Daily required output = /10 SM
Hourly required output = /8 SM
= 3750 SM
Output required per min = 3750/60
= 62.5 SM
Labor Required = 62.5 /80% * 90% * 90%

9. Labor required
62.5 * 100 * 100 * = * 90 * 90
= 96.45
= 97 People