Machine knitting cables: single bed, introducing the ribber

Using two beds is the obvious means of creating a purl ground in combination with your cables, it will be addressed in later posts. If you are trying to cable more than 4 stitches on the main bed, using the ribber to provide extra yarn for the cross over may solve problems in accomplishing the cross. The ribber needs to be set at half pitch the row before the cables. Needles on the ribber are kept out of work until that row, pushed up to work position, and the row is knit. The loops formed on those needles are then dropped off, the ribber needles are put out of work, and the cables are crossed. The main bed knits until the next row before the cable crossings are once again due. I have recently begun to use water-soluble markers to mark needles positions on metal beds clearly for help in keeping track of locations for specific manipulations.

An illustration of 2 (or more) possible places to pick up extra yarn for a 6 stitch cable crossxtra_yarn

Below is a revision of a punchcard used in a previous post to track crossings for 3X3 cables, with punched holes added, taking into consideration locations for picking up extra yarn on the ribber. After 2 needles are selected on the main bed, one needle on the ribber on either side of them is brought into work. As the carriages knit across, the ribber needles pick up loops, while 6 needles are selected indicating the location of the cable cross on the next row. Ribber loops are dropped, and the needles creating them are returned to out of work position. The cable stitches are then crossed, and knitting resumes, continuing until needle selection once again indicates that an action is required.

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An alternative solution: reverse the beds, with the ribber doing the knitting. A card may then be drawn to select needles for picking up those extra loops, now on the main bed. The knit carriage is set to slip throughout. Punched holes (or programmed pixels in downloads, black squares in mylars) will preselect in Brother KMs, not only keeping the needle selection error free, but also tracking rows knit between cable crosses being made. Brother ribbers tend to knit more tightly than main beds, so tensions will require adjustment as well. With a bit of planning ahead and doing some “air” knitting, all needles not involved in picking up the extra yarn may be noted and placed out of work. Only the needles for selection will remain in work, thus making it easier drop the loops formed on them during knitting.

This method allows for creating the cables while retaining a somewhat tighter tension. Since the ribber carriage has no wheels or brushes to help hold the knit in place, weight must be used. Too much of it will lead to more frequently dropped stitches. It is always good to bring cable group stitches out to holding (E) in order to visually check that transfers have occurred properly,  and that there are no dropped stitches before continuing to knit.

 

 

Some cables to try, hand knit

The first repeat below is for a vertical cable panel 24 stitches wide, 12 rows high (2 repeats shown); within the repeat, odd rows are all knit, even rows are all purl. Colors are indicative of cable crossings.

Borders in swatch, or area in between multiple vertical panels, may be worked as 1. purl on even numbered rows, knit on odd numbered rows to create a purl ground behind the cables on the “right side”, or 2. knit every row for garter stitch in same areas.

Abbreviations : RS: right side, WS: wrong side. CF and CB indicate where the cable needle (CN) is held during the process.

CF: CN to front | LC: Left Cross, cable leans toward left

CB: CN to back | RC: Right Cross, cable leans toward right

Dotted borders in chart outline columns 3 stitches wide; all cables in sample are 3X3 crosses.

An alternative way to picture things: numbers on left of chart below indicate row numbers; on the right they indicate number of stitches knit before crossing cable stitches begins on that row

the hand knit swatch

IMG_1656Adding a purl stitch ground: a shortened chart using Aire River Design font, odd rows only shown

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using color in Excel, showing every row

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screenshot_03Avisualizing multiple repeats

in repeat

a very quick, hand knit test swatch, knit with needles a bit too large for yarn used

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another possible charted in Excel, multiple repeats shown

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If patterns are for publication in specific venues, conventions in symbols may or should have to be observed. To keep track of personal projects we often differ in what format or shorthand makes the most sense to us. If the like of the above result appeals to you, I am sharing a workbook with pertaining puzzle pieces. I find working at 200% magnification is the easiest for me, that may be easily changed to suit.

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PS: My working palette in the original document was as seen in the images above. You may find some of the colors will be different in your download, depending on your computer. I have read on other sites in the past that the color change can be an issue in excel knit charting downloads. The image below reflects such a change. It is a quick capture of part of the chart when I tested the download myself. The large color blocks are the ones affected, and may be easily changed to match the cable crossing colors.

color change

A bit on ribbers: Japanese KMs, alignment, and symbols

Before approaching using ribbers in relationship to cables I thought I would mention a bit on alignment. Online sources reviewing the topic with downloadable PDFs: Brother bulky , Brother standard . Studio machines’ how to may be found on youtube video by Roberta Rose Kelley. Before making any adjustments check that the clamps that hold the ribber in place are flush with the table and securely clamped; that the screws in the setting plate are not loose, and that they are installed at the same depth.

Make any adjustments based on needles at each end. Ribbers tend to bow in the center with wear and age. To check how needles in both beds line up in relationship to each other: with the racking lever on 5, the pitch lever on P, pull forward at least 10 needles on each end of both the main bed and the ribber, they should line up point to point. If any of the needles do not touch or line up, loosen the 2 screws to the left end of the ribber just a bit, tap the end of the ribber with your hand just enough to the right or left to line up needle positions. Recheck the alignment on several spots across both beds, tighten screws, check again.

To check the height of the ribber: pitch lever on H, bring it to full up position (Brother has 2 up positions) and bring forward at least 10 needles at each end of the main bed. Use spacers ie. a credit card, or claw weight hangers that came with ribber as measuring aides; they should slip easily between main bed needles and ribber gate pegs, the recommended distance between the back of the KR needles and the KH gate pegs is 0-0.6 mm.

The online PDF has additional photographs of the nut that needs to be loosened in order to change the height. To loosen it, the ribber needs to be brought to its down position. Use the spacer tool, start with a quarter turn to begin with, (lefty loosey, righty tighty) . Lift the ribber into place. By moving the thin metal lever (adjuster plate) up and down the height may be adjusted, one side at a time. Bring the ribber down to tighten bolt, up again for a final check.

Lastly, with main bed needles out of work bring groups of ribber needles out to E. A single claw weight should slip behind the ribber needles and in front of the main bed gate pegs. Repeat adjustments if needed so the space between the beds is as equal as possible. The space between the bottom of the main bed and the top of the ribber gate pegs should be between 1.1 and 1.7 mm.

To adjust the distance between the 2 beds: bring at least 10 needles out at each end of the ribber. Use the spanner to loosen the thumbscrews, and a screwdriver to loosen the flat clamps. My own ribber actually bows in the center toward the knit bed, so its ends need to be further away than any recommended mm. As adjustments are being made, and the thumbscrew is tightened, the setting plate may actually slide toward the main bed, narrowing the gap. To prevent that from happening I had to use a metal spacer between the stopper and the main bed. After adjustments are satisfactory, return to needles to A position, drop the ribber, and tighten the flat clamps.

Yarn thickness and needle arrangements may also require some tweaking of height and other adjustments. Listening for changes in machine sounds as the fabric is knit, and visual checks over time are a great help in avoiding problems.

Knitting symbols used for the ribbing attachment show what the stitches would look like on the “wrong” side of the knit. In Brother system, KR refers to ribber bed, KH  to the knit one: typical illustration of symbols as found in Brother punchcard pattern and technique books:

rib set up

 

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A swatch experiment

A while ago the image of a sweater attributed to Armani  caught my attention in Pinterest, and I became obsessed with creating a variant.

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Lace is actually an interesting 3D fabric until it is blocked and made to lie flat. I went the lace route to work out my “scales”. The swatch I created below is hand knit, could be reproduced as a machine knit hand technique with the aid of multiple transfer tools. I would recommend a yarn with “memory”, such as wool. The bottom of 3 sets of “shells” were knit on #  7 needles, and the remainder on #5. I found I preferred to control the lean of knit together stitches on the knit side, but did not deem it necessary on the purl.

the knit side

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and purl side!

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my working notes  (Excel) showing multiple repeats

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symbols used symbolsa printable PDF  scales_all_info

A mini-me version knit on 4.5 mm. machine, using the same yarn as in hand knit sample above, at tension 10+. Repeats are worked out around 2 center needles, on which stitches are doubled as transfers are made. When the the pairs of doubled up stitches are reached with loops on either side of them after the last transfer/knit one row in sequence, knit one additional row across all stitches before reversing direction of transfers. That row is represented in green in the chart below. Symbols used are minimal since the same side of the knit is in constant view (incomplete full pattern repeat)

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knit side

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purl side

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see update3/28/2015

Visualizing knit cables in color_ Excel

In the past I have suggested methods for working in Excel, and provided links to excellent material shared by others online. Of late I became interested in using the program to produce simple color graphics for cable illustrations. It is helpful to have prior experience in using Excel for knit charting. This is not intended as a complete tutorial. I am providing a document for experimentation. I would suggest copying and pasting the individual shapes to a different part of the document before playing with color changes, resizing, etc. This may be done within the chart in progress, or separately, and then copying /pasting or moving the final result into place.

The resulting charts may be used in both hand and machine knitting. My illustrations here are intended for machine knits, so they do not combine purls and knits on their ground. Images represent single side view: as they would appear on the knit side facing hand knitters, or the purl side facing the machine knitter. Stitch, row marking, and text may be added as wanted.

Chosen from the view menu, the object palette allows selection of built in available shapes. Once a shape is drawn into the workbook, the formatting palette allows access to image size, rotation (including flipping both vertically and horizontally, and alignment (moving front to back and reverse).

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Color fill – unless standard colors are chosen, there will be issues matching colors combined when using with bucket fill from toolbar to add color to cell(s)

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formatting options: fill

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shape border: line, color (or not)

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one of the ways to access size, rotation, aspect ratio

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sample results

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an in progress document for experimentation: blog_color_cables. Adjust zoom to personal preference for either viewing or working, grab portions of working screen for images of sections of workbook to save, or save as, and explore PDF options.