There are four- and six-color changes available as additional attachments for most flat-bed knitting machines.
Double-bed knitting machines often come with their own built-in color changers (2-color changer for Passap 80 and 4-color changer for Passape E6000), which can be upgraded to 4- and 6-color changers (for Passap 80 and Passap E6000, respectively).
The list of color changers below is split by manufacturer and then by main features.
Brother
The model name of Brother color changers hints on what the color changer can/should be used with. If you see an “R” in the model number, that means the color changer can be used on a knitting machine setup attached to a ribber. If there is no “R” in the model number and only “H “, the color changer can be used when only the main bed is forming the stitches.
Brother KHC800, 4-colors, for single beds
Brother KHC820, 4-colors, for single beds
Brother KHC820A, 4-colors, for single beds
Brother KRC800, 4-colors, for double beds
Brother KRC830, 4-colors, for double beds
Brother KRC840, 4-colors, for double beds
Brother KRC900, 4-colors, for double beds
Brother KRC-1000E, 6-colors, electronic, for double beds
Brother KRC-1100M, 6-colors, for double beds
KnitKing
KnitKing KCC, for single beds
KnitKing RCC, for double beds
MITSIBISHI
COLOR 7 MH700
Passap
DM80 Color Changer
E6000 Auto color changer
Singer/Studio/SiLver Reed
My analysis and deduction method revealed that the acronyms YC and AC stand for “yarn changer” and “automatic yarn changer”, respectively. So, basically, AC and YC indicate almost the same (the numbers are sometimes), and the AC and YC terms are often used interchangeably depending on the branding.
AC2
YC1
YC2
YC3
YC5
YC6
Superba
Superba Colour Changer
Toyota
KR86A
Superchanger