Tie-Up Diagonal

This option, accessible on the menu in the tie-up group, allows one or more treadles to be copied to others by stepping the contents. Often this is a diagonal line, such as in a twill. The default values, as shown in the picture below on a draft with 8 treadles, allow for the tie-up to be generated based on the value on the first treadle, and shifting each of the shaft selections up by 1 on each subsequent treadle in the tie-up, wrapping when the shift goes past the highest shaft. Any prior values in the tie-up are erased and replaced.

The fields that may be selected for the Tie-Up diagonal button are:

• Start - first treadle in the tie-up to use as the copy-from

• Step - number of shafts to step when copying the values from the prior treadle. The direction of the step is UP, unless the down Down button is clicked.

• Treadles - Number of treadles to copy on each iternation of the copy.

• Stop - Treadle for the last copy operation. Shaft selections in the Treadles after the Stop value will not be changed.

• Down - direction of the copy.

Example - Copying one treadle to the end

For example, the following tie-up shows treadle one with shafts 1,2,4,6 and 8 selected.

Tie-up With Shaft One Entered

Generated Tie-up with Diagonal Options

Example - Copying two treadles and stepping by 2

Starting Tie-Up

Using these options: Starting with 1, using 2 treadles (1 and 2), stepping by 2 and stopping at treadle 8

Result:

Result of Diagonal Shift

Note that in this example, shafts that were selected on Treadle 1 (1,2,4,5,7) are now copied to Treadle 3; since step was 2, the 1 moved to 3, 2 moved to 4, 4 moved to 6, 5 moved to 7, and 7 wrapped around and moved to 1.

A similar action was taken on treadle 2 to generate the entries on treadle 4.

Next, the new values on treadle 3 are used to generate values in treadle 5, etc.