Floor Loom Annual Heddle, Reed & Tie-Up Inspection Log

ContextPlace your loom at a comfortable height, take a breath, and drag your fingertip through every single dent, one column at a time. You're feeling for tines that are bent inward (they'll catch your finger), bent outward (the gap feels wider, finger passes without resistance), or missing entirely. A single bent tine in a 10-dent reed woven at high density will leave a visible stripe at the same warp position in every inch of fabric you produce until you find the cause. Don't skim — a standard 36" reed at 10 dpi has roughly 360 dents; the inspection takes about three minutes and is worth every second.

ContextReed manufacturers specify dents-per-inch (dpi) or dents-per-centimeter, but reeds distort over time, especially wooden-framed reeds in humid climates. Place a 1" ruler flat against the reed face and count the dents within that span at the left edge, center, and right edge. If the count differs by more than 1 dent between positions, the reed has racked and will produce inconsistent sett across the warp width — most noticeable in color-block designs or with highly twist-sensitive yarns. Steel-framed reeds are far more dimensionally stable than wood; if you've had recurring sett inconsistencies, upgrading to a stainless-steel reed ($60–$150 for a standard weaving width) is often the single most impactful loom investment you can make.

ContextWooden reed frames are glued and sometimes pinned at the corners. Squeeze each corner gently — any give, creaking, or visible gap indicates glue failure. A reed with a separated frame will rack progressively under beating force, skewing your woven cloth wider on one side. Minor separation can be re-glued with wood glue, clamped for 24 hours, and checked for square with a carpenter's square while drying. If a corner has failed more than once on the same reed, replace it — a re-glued frame never returns to full rigidity and will fail again at an inconvenient moment.

ContextEven stainless steel reeds develop fine surface oxidation in high-humidity studios. Hold the reed up to a bright light and look for reddish-brown patches (rust on carbon steel) or white powdery deposits (oxidation on aluminum). Carbon steel reeds with surface rust can be treated with 0000 steel wool — always work with the grain of the tines, never across — followed by a light wipe with camellia or sewing machine oil. Reeds with rust that has formed pits into the tine surface must be replaced; pitted metal will abrade and snap fine threads regardless of any lubricant applied. Aluminum reeds with light oxidation are generally safe unless the deposits are thick enough to create noticeable friction during sleying.

ContextLower the reed into the beater and close the top cap or clamp. Shake the beater firmly side to side — the reed should not rattle, shift laterally, or tilt forward. A reed that shifts during beating causes inconsistent beat density; some picks will be packed tighter than others, producing visible horizontal irregularities in the cloth. In extreme cases a loose reed can jump out of the beater mid-swing. If your beater cap clamps are loose, tighten the bolts and check the wooden or plastic jaw surfaces for compression damage. Replace worn jaw material if needed — this is as much a safety issue as a quality one.

ContextHold each cord at mid-length and flex it 90 degrees. Braided cotton or linen tie-up cords that are near failure will show individual strands splaying out, or surface fibers that fuzz when bent. Texsolv tie-up segments should be inspected at the peg holes where they attach — these holes concentrate stress and are the most common failure point on Texsolv systems. A snapping cord mid-weave can cause a shaft to drop or shoot upward unexpectedly, potentially tangling with adjacent shafts. Budget about $15–$30 to replace all tie-up cords on a 4-shaft loom if you find widespread wear — replacing cords in one batch is far better than having them fail one at a time across several projects.

ContextLams (also called lamms or levers depending on brand) pivot on metal rods that pass through the lam ends. These pivot points accumulate debris and develop play over years of use. Hold each lam at its far end and try to wiggle it vertically — more than 3–4mm of play means the pivot hole has enlarged, and the lam will not deliver a consistent angle to the shaft. Clean pivot rods with a dry cloth to remove lint, then apply a small amount of beeswax or paste wax (not liquid oil, which runs down and soaks lower lams). If a lam has cracked at the pivot hole, replace it before further weaving — a lam failing under tension can splinter dangerously.

ContextMetal tie-up hooks screwed into the castle uprights are load-bearing every time you depress a treadle. Grip each hook and try to turn it — any that spin freely have stripped threads in the wood and will pull out under weaving tension. A stripped hook can be reset with a drop of epoxy wood filler, allowed to cure for 48 hours, before re-threading the hook. On looms that use wooden pegs (some Scandinavian designs), check for splitting along the grain and replace immediately with a properly-sized hardwood peg rather than any makeshift substitute.

ContextPress each treadle slowly through its full range with your hand — not your foot. You're checking for lateral wobble (the treadle slides sideways instead of pivoting purely up and down), grinding at the pivot, or inconsistent resistance. Lateral wobble usually means a worn pivot rod or a loose treadle-to-rod connection; it forces your foot to do extra corrective work and can accidentally activate adjacent treadles. Grinding usually means the pivot rod needs cleaning and light lubrication. If two adjacent treadles bind against each other, check whether the loom frame has shifted — this can happen after moving the loom or after extreme seasonal humidity changes.

ContextSystematically press each treadle and visually verify which shafts rise — or sink, for countermarch looms. Write down or photograph each result and compare it against your most recently saved tie-up chart. It is not uncommon for cords to be accidentally swapped during previous cleanings, creating a tie-up that produces the wrong interlacement with no obvious mechanical fault. Catching this before a warp is threaded takes 10 minutes; catching it after three inches of weaving takes much longer and may require cutting off and re-sleying.

ContextThe mortise joints where heddle bars insert into the shaft uprights are the highest-stress point on most shaft frames. Shine a flashlight along each upright and look for hairline cracks radiating from the mortise — they are often invisible under normal overhead studio lighting. A cracking mortise will eventually shear through, dropping the heddle bar mid-weave and sending heddles across your warp. If you find a hairline crack, contact your loom manufacturer for a replacement shaft upright before loading another warp. Do not reinforce with tape or glue as a permanent solution — the forces involved make that approach unsafe.

ContextCountermarch and counterbalance looms rely on suspension cords or horses to link shafts into a balanced system. Hang a small weight from each cord and check for any lateral lean — a cord that has stretched more than its paired counterpart will cause one shaft to hang lower, producing an uneven shed that is difficult to diagnose without tracing it to this source. For jack looms, inspect jack springs or pivot arms for metal fatigue. A shaft suspension cord replacement typically costs under $20 in materials but requires a full re-tie — an afternoon of work that is far easier to schedule during an annual inspection than mid-project.

ContextWith no warp on the loom, release all tie-ups and let the shafts hang freely. Stand at the back beam and sight across all shaft frames — they should all sit at the same height. A visibly lower shaft indicates either a stretched suspension cord, a heavier heddle load on that shaft, or a lam alignment problem. Even a 5mm difference in resting shaft height can cause one shaft's shed to open noticeably narrower than others, showing up as shuttle-catching on certain treadles. Adjust cord lengths in small increments of 2–3mm, retesting after each adjustment.

ContextThe castle is the vertical structure holding the entire shaft-and-heddle system. Grip the castle at the top and apply a small lateral force — any rocking or creaking means a joint has worked loose, most often from seasonal wood movement in humidity-variable studios. Tighten all castle bolts and check wooden wedge joints (common on Scandinavian-style looms) for shrinkage gaps. A loose castle transmits shock unevenly to the shafts during beating, which over time enlarges pivot holes and distorts tie-up geometry. Looms kept in garages or unheated spaces require this check especially after winter.

ContextThe beater must swing in a true arc to pack weft evenly across the full weaving width. Hold the beater at the top and swing it through its full range — it should feel balanced and return to rest consistently without veering left or right. Side-to-side wobble at the pivot indicates wear in the pivot socket. Most looms use a bolt-through-wood pivot; check whether the wood has compressed or cracked at that point, and whether the bolt has worn an oval hole rather than a round one. An oval pivot hole causes the beater to kick sideways as you beat, producing diagonal weft threads rather than true horizontals — a defect that is almost impossible to fix after the cloth is woven.

ContextOpen the beater top cap and run your fingertip along the inner seating channel that holds the reed. This surface should feel uniformly flat. Wooden seating channels compress unevenly over time, creating high and low spots that grip the reed inconsistently. If the reed rocks in the beater even when the cap is fully clamped, shim the low spots with thin self-adhesive felt strip — this is a recognized repair used on production looms worldwide and does not compromise the beater's function.

ContextThe lower attachment point of each beater upright absorbs a repeated impact load — every beat for the loom's working life. Look for horizontal cracks in the wood grain at this point; they signal fatigue failure beginning. Also check for any wobble between the upright and its base attachment — a loose lower joint causes the beater to twist slightly during each beat rather than swinging straight, distorting weft insertion angles over time. Tighten bolts, replace damaged washers, and if cracking is present, contact the manufacturer for a replacement upright before continuing to weave.

ContextThis entry transforms your inspection from a one-off task into a traceable maintenance record. If you ever sell the loom, a complete log demonstrates care history and meaningfully adds to resale value — buyers of well-documented floor looms consistently pay more. If a component fails six months from now, the log tells you whether it was recently inspected and what condition it was in, helping diagnose whether the failure was predictable wear or a sudden event. Keep the log inside the loom cabinet in a paper binder or in a shared digital document — whichever format you will actually maintain year over year.

ContextMost weavers accumulate multiple reeds over time — 8 dent, 10 dent, 12 dent, 15 dent, perhaps a metric reed or a specialty fine-dent reed. Assign each a three-level rating: Good (no issues found), Monitor (minor wear, check again at next project start), or Replace (degraded beyond safe use). Include the date you acquired each reed and its approximate age if known. This rating system gives you an at-a-glance inventory when starting a new project so you can select the best available reed for your fiber and sett without re-inspecting the full collection each time.

ContextShaft heddle configurations change over time — you may have borrowed heddles from shaft 7 to supplement shaft 2 for a wide dense warp and never restored them. Document these changes explicitly. Six months from now, when you go to thread a balanced 8-shaft draft and find shaft 7 suspiciously light, the log tells you exactly what happened and what needs restoring. Also record heddle types per shaft (wire, Texsolv, flat steel) since mixing types on the same shaft causes inconsistent warp-to-heddle friction that manifests as uneven shed tension.

ContextEnd the inspection with a clear action list organized by urgency, not just a stack of observations. Order Now covers parts with lead times — some loom manufacturers ship specialty parts in 4–8 weeks, so order heddle bars, shaft uprights, or specific reed sizes immediately if you know they'll be needed before your next warp. Schedule Repair covers tasks requiring an empty loom window, such as replacing shaft suspension cords that need a full re-tie. Recheck in 90 Days covers wear that isn't yet critical but needs re-evaluation before your next major warp. This triage prevents the log from becoming a record of observations that never become actions.