Saturday, 30 October 2010

treble-cloth construction

I am currently in the process of designing a triple layered fabric. One layer shall carry conductive warp threads (one out of every three), another layer shall carry conductive weft threads (again, one out of every three) and a third layer shall lay between them and act as an insulator, keeping them apart and preventing unwanted contact between the two conductive layers.

Constructing a treble cloth is a compicated process. The way that a treble cloth is woven is that first the face cloth is woven, then the centre cloth is woven, then the back cloth is woven.
This is a draft for a treble cloth. The crosses indicate weaving marks for the cloth currently being woven, the dashes are lifts and are used to indicate shafts that are being lifted in the case of layers that are above the layer currently being woven.

Blue is back, Red is front, Green is centre

(All three layers are plain weave btw)

The cloth is constructed like so

1: Back cloth is woven. All red and green marks are lifted up
2: Middle Cloth is woven. All red marks are lifted, blue marks are all left down
3: Front cloth is woven. All blue and green marks are left down.
and repeat.

 I now make the plan for the other section, where the back and front faces interchange. The only difference here is that the lifting marks are swapped around so that the colour that was once on the face is now on the back and vice versa
 I want to be creating a checkerboard effect here, so i combine these two weaves together like so:

There is my finished draft, which i shall have to run past my lecturer on monday to make double sure i haven't bolloxed anything up.

In order to create the checked effect, i have to alternate the shafts which i'm threading up. So section is threaded on the front 6 shafts, and the other section, where the front and back faces are reversed, is threaded on the other 6 shafts.

I'd love to say i was anywhere near finished working this out, but i'm not. heyho

Saturday, 23 October 2010

having lots of fun with grid paper

i've been having fun today, weaving away and making up new drafts.

 This is a selection of the drafts i've been making up as I idly whittle my time away, avoiding doing what i'm supposed to be doing in my timetabled class time. Also what I've been doing at home when i should be studying for a test on colour chemistry, which isn't going to be easy. We're also going to get tested on weave structures and processes, but I know most of that and besides it tends to conform to logical rules. Colour chemistry and dyeing and all that though you just have to know. I guess there probably is some logical consistency to it, but probably only if you already happen to be shit-hot at molecular chemistry and physics and biology. Which I'm not
 I've also been weaving away (as I say) and have just finished my first sample of a pattern repeat i took from the knotwork book i mentioned before. It's working out rather well, although you can blatantly see the reed lines in the warp, it's a pain. With any luck it'll even itself out in finishing.
These pictures were taken with my new USB microscope. I got it for my birthday from my parents along with a beginner's Arduino kit, for which to be playing with textile electronics. i want to make an array of switches. It's difficult to explain. But now i have a microcontroller. Here is a picture close-up of a fucked-up bit of my bag where the fabric has been stretched and distorted due to rakes of stuff being stuffed into a small bag:

Is a little bit fuzzy, i forgot to take the lenscap off. Is good for examining fine fabrics close up and that. You can see how the fabric there's been damaged, is pretty good eh?

Anyhow, I've got a 24 shaft warp of 2/19's cotton to play with and more ideas than i know what to do with. considering that it takes me about an hour and a half to hammer in a 24 lag peg plan, it's probably worth taking care in what exactly i'm going to be weaving, as I can't spend all year making this one warp. I also have my special project to be working on, as well as a christmas present for my mum, which is a linen table runner and matching placemats. It's a surprise, but it's ok because she's allergic to the internet so she'll never know as long as noone tells her.
Having looked at some of these drafts a bit more closely it occurs they're occassionally flawed and wouldn't work actually. The above weave is a classic example of what happens when my love of symettry isn't working with commonsense and such.


Wednesday, 6 October 2010

week 4 of 2nd year

and we're spending pretty much all of our time in the weave shed.

pretty much everybody has ended up doing double weave, which means that pretty much everybody is behind. i'm doing an interchanging double weave with 2/2 twill on both shafts, meaning i'm using 16 shafts. my lecturer tried to talk me out of it, but i wasnae listening.

i hadn't thought of this before i started, but it turns out that areas of the fabric where the two faces interhange often tighten up a lot quicker than those areas of the warp where the faces don't interchange. as you can see in the second one the interchanging is occuring every 8 picks, by the time i'd finished i had to cut the fabric off and retie onto the front stick 'cause the warp was slack on the sides and in the middle and it was becoming impossible to weave properly.

that's why you're seeing these before i've finished the 3rd sample. we have 3 samples to do. it was supposed to be finished by the end of the week, but as some people have only just started weaving we've got an extension.

the weave department is understaffed, the college administration have no understanding of it whatsoever

in other news, i've just ordered a 400X magnification USB microscope (for examining textile fibres) and an Arduino Microcontroller newbie's kit, for to play with electronic. for my next project i want to create a fabric with conductive warps and wefts that can act as a touchpad by connecting one warp with one weft via the conductivity of the finger and all that. but i need to get the electronic part sorted out.

i need at least two layers of fabric (one with weft and one with warp) so the two sets of conductors are seperated from each other. i also possibly need an insulating layer in between, but i'm not sure about that yet.

it would be kinda groovy to make triple layered interchanging fabric though, a proper challenge for the old brainbox and that. would make me feel dead clever that would