Hello all! I'm hoping someone else has seen this problem and worked out a solution, because it has been baffling me.
I have an older Baby Mac -- I think I am its third owner. It is an add-a-harness loom with all eight harness and ten treadles. When I am weaving, some of the lamms, especially the back four, but sometimes even the front four, will jump tracks. This means that I end up with lamm 7 in the same groove as lamm 8 and, obviously, the harness doesn't move properly any more.
Other problems: my shed is not consistently clean and open; and the uprights frequently fall out of the harness. The shed not being open could be worked with once I felt I could trust the loom in other ways, but the uprights falling out is, I think, connected to the leaping lamm problem.
I have taken some pictures and uploaded them to flickr: http://www.flickr.com/photos/bibliotecaria2/4374055475/in/set-72157600238235061 this is one, and there are several after it that try to give different views of the problem.
I am deeply frustrated by this, as it interrupts my zen weaving state. I feel like I am fighting my loom. So many people love their Macs, I would like to love mine as well, but right now, my emotions are fairly negative.