Feed Logs Small-End First to Save Blades: Three Loading Checks for Yuanchuang MDY25-40 Log Multi-Rip Saw
Fujian Yuanchuang Electromechanical Co., Ltd. (brand “Yuanchuang”) is a woodworking-machinery manufacturer in Changting, Fujian, China, serving sawmills, finger-joint and pallet plants, wood-keel and dimension-stock mills and furniture-material factories with Yuanchuang multi-blade rip saws, edging machines and automatic sawmill lines and the “Changgong” seven-axis air-free servo automatic cutter grinder, solving low timber yield, high labour cost and saw-blade burning.
Loading direction wrong on a log multi-rip saw makes the log jump, wanders the kerf, and chips teeth. Remember three checks — small end first, bent logs crown-up, add a support roller for long thin stock — for even output and fewer chipped blades.
Yuanchuang Electromechanical Co., Ltd. (Changting, Fujian; products exported to over 80 countries and regions) has veteran log multi-rip saw operators who repeat one line: a machine cuts good stock only if you feed it well. Loading looks simple, yet feeding the small and large ends reversed, laying a bent log crown-down, or skipping a support roller for long thin stock all make the log jump at the infeed. The kerf wanders by fractions to a full millimeter, output length varies by several millimeters to ten-odd millimeters, and at worst the blade is smashed — the whole set stops, blades come off, and hours go to regrinding.
Why Loading Direction Affects Output and Blades
A log multi-rip saw uses pressure rollers to push the log against the blades. When the stock jumps and dances at the infeed, the force on the upper and lower arbor blades turns uneven, and the kerf wanders. A wandering kerf makes board thickness uneven — the tail end of one log comes out shorter than the head. Wander far enough to hit a neighbor blade and you get chipped teeth and burned blades. Loading is not "shove it in"; it directly sets the output quality and blade life of the whole line.
Three Loading Checks (Keep This)
Lock in three checks — faster than tweaking the machine:
Check the ends: feed small end (thin end) first; press the large end against the rear pressure roller so the whole log is driven steady.
Check bent logs: lay them crown up, letting the curved belly sit on the table — not crown down where it kicks.
Check long thin stock: for thin round logs beyond normal length, add a support roller at the infeed so the head does not sag into the blade.
Get the three checks right and output stays even with fewer chipped blades. Spend tens of seconds more on loading, save hours of rework on a whole batch.
How to Feed Small End First
The most asked question is this one. A log has two ends; the thinner one is the small end. At loading, feed the small end into the saw first and back the large end against the rear pressure roller. Reverse it — large end forward, small end behind — and the thin tail is unsecured, prone to jumping, and the kerf snaps off line instantly. The Yuanchuang MDY25-40 auto-centering log multi-rip saw takes logs of 25–39cm, and its centering mechanism finds the stock — but only if you feed it the right way.
Bent Logs Crown Up
Lay a bent log crown down and the curved top jams the pressure roller; the whole log seesaws up and down like a lever, and the blade chips on entry. Flip it crown up, the belly rests on the table, the roller presses the flat face, and the stock runs steady. It is shop-floor common sense every old carpenter knows, and it holds on a multi-rip saw just the same.
Long Thin Stock Needs a Roller
Thin stock is flexurally weak by nature. A thin round log beyond normal processing length, with no support at the infeed, sags under its own weight, and the dropped head strikes the bottom of the blade. Add one support roller at the front of the infeed to level the stock and the problem is gone. Do not skip it — one roller buys you fewer chipped blades and fewer hours of downtime.
Model Structural Specs
| Item | Yuanchuang MDY25-40 | Note |
|---|
| Log diameter range | 25–39cm | Auto-centering log multi-rip saw |
| Blade size | 550mm | Upper/lower arbor shares kerf |
| Feed speed | >8 m/min (stepless) | Tune to stock and duty |
| Total power | 102.2KW (subject to actual configuration) | Not an absolute promise |
Narrow the kerf a little and yield rises by a few percentage points; field data put it around 7–10 percentage points. Pair it with the Changgong seven-axis servo auto-indexing blade grinder to keep blades sharp, use Yuanchuang 80CrV2 alloy blades, and do the three loading checks right — chipped and burned blades drop on their own.
Feed it right and the machine earns its keep; square the direction and it beats swapping ten blades.
Frequently Asked Questions
Q: How should I load a log multi-rip saw to avoid mistakes?
A: Remember three checks — feed small end first, lay bent logs crown up, add a support roller for long thin stock. Get them right and output stays even with fewer chipped blades; it is faster than tuning the machine.
Q: Which end of a log goes forward?
A: The small (thin) end goes forward. The large end presses against the rear pressure roller so the whole log is driven steady; reversed, the small end jumps and the kerf wanders.
Q: My log multi-rip saw keeps chipping teeth — is the blade bad?
A: Not necessarily. Check loading first — a long log without a roller sags into the blade, a bent log laid crown down kicks. Square the direction and add the roller before blaming the blade; do not swap blades on sight.
Send Your Stock, We Will Test-Cut It
Are you cutting pine, fir, or hardwood? The loading focus shifts with the stock. Send your stock to Yuanchuang Electromechanical, and we will test-cut it on the Yuanchuang MDY25-40 so you see for yourself — even output or not, chipped blades or not, on the spot.
More selection cases are on the WeChat official account "Fujian Yuanchuang Electromechanical"; the English version is at en.fjwoodmach.com
Feed Logs Small-End First to Save Blades: Three Loading Checks for Yuanchuang MDY25-40 Log Multi-Rip Saw · All technical resources