Reading a Machine Renata Brenner The Design Machine

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Reading a Machine Renata Brenner

Reading a Machine Renata Brenner

The Design • • • Machine made - stamped/pressed parts/molded Metal & Plastic (Bakelite)

The Design • • • Machine made - stamped/pressed parts/molded Metal & Plastic (Bakelite) Sturdy Interchangeable/universal – fits multiple machines Gears, ratchet, ball bearings Interchangeable cams –cast Adjustable – Interchangeable cams – changed by hand – Bight adjustment – stitch width – depress lever to slide – Cloth clamp – position • • • Install w/ screwdriver Lubricate Cloth clamp – toothed surface

The Design • • Power input is through fork arm – from needle clamp

The Design • • Power input is through fork arm – from needle clamp Drives ratchet – Advances material through path determined by cam on needle upstroke – Moves material back & forth perpendicular to path of needle on needle upstroke – Stripping arm holds cloth down on needle upstroke – Holds material stationary on needle downstroke • • Can be advanced manually with knob Need to cover/retract feeddogs

The Design

The Design

What were the designers were trying to accomplish?

What were the designers were trying to accomplish?

What were the designers were trying to accomplish? • Sewing machine stitches in a

What were the designers were trying to accomplish? • Sewing machine stitches in a straight line • Create a buttonhole – opening with bound edges (retain shape -prevent fraying)

What is the object designed to do?

What is the object designed to do?

Is it part of a system?

Is it part of a system?

If so, where and how does it fit in? • Screws onto machine presser

If so, where and how does it fit in? • Screws onto machine presser bar • Fits onto needle clamp

What is the expected input and where will its output go? • Device holds

What is the expected input and where will its output go? • Device holds and moves fabric in synchrony with the sewing machine needle in order to create a buttonhole

Who would use it?

Who would use it?

What they were assuming about the people who would use it? • • Knew

What they were assuming about the people who would use it? • • Knew how to sew Read instructions/diagrams Use a screwdriver Reasonably mechanical

What is that person expected to know? • Parts and Functions • How to

What is that person expected to know? • Parts and Functions • How to perform basic tasks with the sewing machine

What is she or he supposed to be able to learn? • • •

What is she or he supposed to be able to learn? • • • How to install Position/adjust Choose thread/size/style based on fabric/button Adjust width Maintenance: open & lubricate

Phylogeny

Phylogeny

Sew Long!

Sew Long!