Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2502887.
Changeover Cams for the Silver Reed Knitting Machine AW1 Weaving Arm.
Silver Reed machines were called several names depending on which country they were sold in. They were also knows as Studio, Singer, Empisal, and KnitMaster.
The AW1 Weaving Arm fits the SK326, 327, 328, 329, 560, 580, 260, 360 700, and 740 standard gauge (4.5mm) machines. Supposedly you could also use the Weaving Arm on fine gauge machines with modifications. These Changeover Cams fit the standard gauge machines only.
With the AW1 Weaving Arm, you can weave a larger (chunky) yarn through the stitches of a standard gauge machine. Weaving can be accomplished with the standard presser foot of most machines, but requires manually moving the yarn from one side of the carriage to the other after each row. The AW1 Weaving Arm automates this task. Unfortunately most AW1 Weaving Arms are missing the Changeover Cams. The Changeover Cams are placed on either side of the knitted garment and trigger the cam lever on the AW1 arm. Without the Changeover Cams, you have to manually manipulate the cam lever on each row.
After many months of searching, I obtained a set of the original Changeover Cams for my AW1 Weaving Arm. From those original Changeover Cams I was able to measure and model up a 3D Printed replacement for the Cams.
Originally you were supplied two sets of the Cams, two for the left and two for the right. Normally only one Cam is used on each side of the garment, but it is recommended to place both cams on the bed together when knitting full bed garments to ensure the cam lever trips properly.