double box shifting mechanism - maintenance?

The improvised picker returns work fairly well, but now I have another problem: the shifitng of the boxes.

Sometimes (maybe a third of the times?) when I shift the boxes, the one coming up stops short of at the correct height. Another try will get it all up. This happens at both sides, and from what I can see the elastics are not in the way.

Is there some maintenance I should have done? I looked through the manual but couldn't find anything on that. It has been more than 6 months since I last used the double boxes. I have tried to lubricate everything I could think of, but the problem doesn't go away.

Any tips?

Comments

Posted on Sun, 07/08/2012 - 15:17

On my AVL double box there are set screws that can be adjusted to fine tune the drop and lift height.  Maybe they need re-adjusting?

Dawn

 

Posted on Sun, 07/08/2012 - 16:28

Is it the shuttle sticking out too far preventing the box from moving all the way?  (That's what happens on mine, but I have a different system so it may be unique to my loom.)

cheers,

Laura

Posted on Sun, 07/08/2012 - 16:42

It can't be the screws, as their function basically is to prevent the box from rising too high - mine now stick at the middle height.

I don't think it can be the shuttle sticking, as the shuttle in q is trapped on the lower level. When I want it up for weaving, it sticks. I'm thinking that the fact I was able to lower the box with shuttle inside should nudge the shuttle "enough" not to create a problem? The side that lowers always goes the whole way - it is just the rising side that sticks.

(I suppose it can be a pilot error - as I said, for the last 6 mo or so I have been using the single box... a longer session tomorrow will tell)

Posted on Mon, 07/09/2012 - 21:09

The problem is identified. It is partially a result of the improvised picker return, partially a pilot error.

The way I mounted the improvised "returns" (buttonhole elastic) means that the picker does not quite return to the starting point (a matter of about 0,5 cm, more or less 1/5") and the pilot's hard throwing of the shuttle - the shuttle sometimes can stick out "under" the picker, preventing the free movement of the box:

As you can guess, the workaround is "put something on the picker to make the shuttle move over a bit" - in this case a piece of paper, tied to the picker.

It works, but after some 1500 picks, it looks like this:

which means I have to find something more durable than paper...

What I'm weaving? A double-layer scarf:

(the back:

)

However: I still can't understand: as I first send the shuttle to the left, then lower the left side box - why doesn that not "nudge" the shuttle far enought to let the box come up next time?