WORK IN PROGRESS
From Dubied pattern books,
1: matching needle set up
2: stitch positions after racking to the right
3: stitch positions after racking to the left
These images illustrate the differences produced depending on the number of rows knit without racking: four on the left and 2 on the right. The knit is reversible, is lightly pleated, and lies flat. 
In this swatch, no rows were knit between racking sequences. 
A pattern that requires no cam changes 
is knit in tubular tuck stitch, using opposite buttons on the knit bed and ribber. The starting size matters in this case to allow for the use of the color changer every 2 rows. Knitting begins on the left, using the settings shown on the left. 
My third color, white, was knit in plain ribbing, would be too narrow if used in a final project, and, if used, should be knit using the same settings as the remainder of the knitting. 
This pattern requires more interpretation, as seen in the blue text notes. 
The knit bed may be programmed, thus automating its functions. The repeat as suitable for punchcard models, 24X36 
the corresponding PNG
and proof of concept, knit on 40 stitches, testing a one stitch knit vertical border on the left side, and 2 stictch one on the other. The 930 automatically mirrors the design.
The needle arrangement 
the program for the top bed, 24X36, usable on punchcard models 
the swatch repeat, 53X36
the starting setup on the machine
The knit bed is set to tuck in both directions, all black pixel rows will form knit stitches. When pairs of rows with non-selected needles occur on the top bed, the ribber is set to knit, the tuck lever may be left in the up position. 
When all needles are selected on the top bed, the ribber is set to tuck
A closer look at the structure on the knit side
Slip stitch designs, beginning with “ripple stitch” sample
Using a spreadsheet to plan racking sequences and respective row numbers:
the repeat is 10 rows in height
1-5 the knit carriage is set to knit, the ribber carriage is set to slip in both directions
for 5 rows, marked with yellow cells
rack by four positions at once. The yarn and tension will need testing to allow for that much movement and for knitting the next row without yarn breakage or carriage jams
6-10 set the ribber to knit, 
knit one row
rack by one position every row X4, returning to the original position
set the ribber to slip in both directions again, repeat the 10 rows.
Following the charted sequence, set up with 3 needles only on the main bed on the right. As the sequence is completed there will be three needles on the knit bed on the left. The original needle setup is restored with return to the original racking position. 
The proof of concept knit in a 2/20 wool 
Cumulative references
Cross-brand pattern interpretations: Dubied to Brother
Double bed embossed patterns
Origami-inspired 2: more pleats and folds using ribber
Racking on EON rib: some considerations
Racking mechanical handle repair saga
Racked patterns 5: Passap/Brother 2
More dragon scales and chevrons in ribbed, racked (4) fabrics
Racking: Passap/Brother 3
Fisherman and English rib checks patterns, Brother and Passap
Ribber fabrics produced with 2 knit carriages selecting needles
Combining knit carriage needle selection with racking
Vertical racking 3: automating half fisherman in pattern (2)
Racking 2: vertical chevrons/ herringbone +
Ribber pitch, a bit on racking 1: chevrons/ horizontal herringbone
Unconventional uses for punchcards 1: tracking racking positions
Racked ribber cast on