• Document: GENERAL INFORMATION RELATING TO ALL LECLERC LOOMS
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GENERAL INFORMATION RELATING TO ALL LECLERC LOOMS All Leclerc looms and accessories are guaranteed for one year, covering materials and workmanship. Parts are replaced free of charge upon proof of defect. All Leclerc looms are made of selected, well-seasoned, kiln dried Canadian maple except for the harness frames and a few parts that require a lighter wood. The metal pieces are of aluminum dye cast, cast iron or steel protected by metal zinc plating. Heddle support bars are now stainless steel. Looms are pre-packed with their assembly equipment. All looms are shipped partially knocked down for easier handling. Assembly is simple and instructions are included. On all Leclerc looms, the tie-up system is very simple. Nylon cords insure years of ser- vice. All floor looms have non-sliding polyvinyl pads under the uprights. A plain warp beam is supplied with each loom. However, a set of rake-like pieces can be added to the pre-drilled warp beam to convert it into a sectional warp beam for direct beaming. (see sectional warp beam system) The looms always have two treadles more than the number of harness frames. A weaving book, giving basic techniques and important information is supplied with each loom. When you choose a Leclerc loom, you buy from a company that: » guarantees its products » gives prompt delivery » offers replacement parts » sells you a loom that has excellent resale value. Your Leclerc dealer can help you in choosing your equipment and will insure you receive after sales service. CA 2016 3 TECHNICAL INFORMATION Counterbalance Loom, Jack-Type loom, Countermarche loom or Jack-Type with back hinge treadles 1) COUNTERBALANCE SYSTEM The threads (in normal position) from the front breast beam to the back thread beam are in the center of the heddle eye and reed. When shafts one and four are pulled down by the action of one or two lams and treadles, shafts two and three automatically move up, from the action of the lower rollers, giving a large, clean shed. ADVANTAGES: - Large, clean shed - Effortless treadling - Good system for rug making when high pressure is needed on the warp - Easy threading because you have to attach only the shaft you want to lower. - You always have the same tension on the upper and lower warp threads - Less expensive than other systems. DISADVANTAGES: - You are always limited to 4 shafts. - It is always more difficult to have a clean shed with an uneven threading like 3 shafts against one. The shed regulator on the Nilus II, Fanny II and Mira II helps correct this problem. 2) JACK-TYPE LOOM With this type of loom, the threads (in normal position) rest at the bottom of the reed, on the shutle race. If a treadle tied to shafts #2 and #3 is pushed down, the jacks will raise these shafts, while all the others remain in place. This kind of shed can be very large or small depending on the pressure there is on the warp threads and how many threads there are. For example, it is easer to obtain a clean shed with a 36" loom that has 20 threads per inch than with a 60" loom with 40 threads per inch.The more threads and tension you have the more difficult it will be to raise the shafts. ADVANTAGES: - You may have more than 4 shafts (8, 12,16) - Threading is easy - Loom assembly is easy - You can change from 4 to 8 shafts at any time. DISADVANTAGES: - More tension to the warp requires more effort to raise the treadles; it may reduce the size of the shed. - In some threading with 8 or more harnesses, some shafts tend to float even if they are not pushed up. This can be improved by adding springs to the treadles or weight to the shafts but may make raising the shafts even more difficult. CA 2016 4 3) COUNTERMARCHE SYSTEM This system resembles the counter balance loom and has the same advantages without its disadvantages.Instead of having the rollers at the top of the harnesses, the system has one set of lams, two sets of pulleys above the shafts and one set of pulleys below. In our diagram you can see the treadle pulling down shaft #1 while the other three are lifted by the action of the lam. When the lam moves down, the cord attached to it goes around the lower pulley, then around the upper one, lifting the shaft attached to it. In a countermarche loom, every shaft is actively involved in each shed: each shaft is either lifted up or pulled down by each treadle. Unbalanced sheds like 3 shafts against 1 are always large and clean . Because you actually lift or pull down every shaft, you never have any problem with one shaft lifting when it should not. ADVANTAGES: - Always gives a clean shed - Effortless treadling - Quiet - You always have the same tension on the upper and lower warp threads DISADVANTAGES: - More tie-ups are needed before you begin to weave because

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